Merge commit 'pci/linux-next'

Conflicts:
	arch/powerpc/kernel/pci_64.c

Documentation/ABI/testing/sysfs-bus-pci

@@ -84,6 +84,16 @@ Description:
 		from this part of the device tree.
 		Depends on CONFIG_HOTPLUG.
 
+What:		/sys/bus/pci/devices/.../reset
+Date:		July 2009
+Contact:	Michael S. Tsirkin <mst@redhat.com>
+Description:
+		Some devices allow an individual function to be reset
+		without affecting other functions in the same device.
+		For devices that have this support, a file named reset
+		will be present in sysfs.  Writing 1 to this file
+		will perform reset.
+
 What:		/sys/bus/pci/devices/.../vpd
 Date:		February 2008
 Contact:	Ben Hutchings <bhutchings@solarflare.com>

Documentation/vgaarbiter.txt

+
+VGA Arbiter
+===========
+
+Graphic devices are accessed through ranges in I/O or memory space. While most
+modern devices allow relocation of such ranges, some "Legacy" VGA devices
+implemented on PCI will typically have the same "hard-decoded" addresses as
+they did on ISA. For more details see "PCI Bus Binding to IEEE Std 1275-1994
+Standard for Boot (Initialization Configuration) Firmware Revision 2.1"
+Section 7, Legacy Devices.
+
+The Resource Access Control (RAC) module inside the X server [0] existed for
+the legacy VGA arbitration task (besides other bus management tasks) when more
+than one legacy device co-exists on the same machine. But the problem happens
+when these devices are trying to be accessed by different userspace clients
+(e.g. two server in parallel). Their address assignments conflict. Moreover,
+ideally, being an userspace application, it is not the role of the the X
+server to control bus resources. Therefore an arbitration scheme outside of
+the X server is needed to control the sharing of these resources. This
+document introduces the operation of the VGA arbiter implemented for Linux
+kernel.
+
+----------------------------------------------------------------------------
+
+I.  Details and Theory of Operation
+        I.1 vgaarb
+        I.2 libpciaccess
+        I.3 xf86VGAArbiter (X server implementation)
+II. Credits
+III.References
+
+
+I. Details and Theory of Operation
+==================================
+
+I.1 vgaarb
+----------
+
+The vgaarb is a module of the Linux Kernel. When it is initially loaded, it
+scans all PCI devices and adds the VGA ones inside the arbitration. The
+arbiter then enables/disables the decoding on different devices of the VGA
+legacy instructions. Device which do not want/need to use the arbiter may
+explicitly tell it by calling vga_set_legacy_decoding().
+
+The kernel exports a char device interface (/dev/vga_arbiter) to the clients,
+which has the following semantics:
+
+ open       : open user instance of the arbiter. By default, it's attached to
+              the default VGA device of the system.
+
+ close      : close user instance. Release locks made by the user
+
+ read       : return a string indicating the status of the target like:
+
+              "<card_ID>,decodes=<io_state>,owns=<io_state>,locks=<io_state> (ic,mc)"
+
+              An IO state string is of the form {io,mem,io+mem,none}, mc and
+              ic are respectively mem and io lock counts (for debugging/
+              diagnostic only). "decodes" indicate what the card currently
+              decodes, "owns" indicates what is currently enabled on it, and
+              "locks" indicates what is locked by this card. If the card is
+              unplugged, we get "invalid" then for card_ID and an -ENODEV
+              error is returned for any command until a new card is targeted.
+
+
+ write       : write a command to the arbiter. List of commands:
+
+  target <card_ID>   : switch target to card <card_ID> (see below)
+  lock <io_state>    : acquires locks on target ("none" is an invalid io_state)
+  trylock <io_state> : non-blocking acquire locks on target (returns EBUSY if
+                       unsuccessful)
+  unlock <io_state>  : release locks on target
+  unlock all         : release all locks on target held by this user (not
+                       implemented yet)
+  decodes <io_state> : set the legacy decoding attributes for the card
+
+  poll               : event if something changes on any card (not just the
+                       target)
+
+  card_ID is of the form "PCI:domain:bus:dev.fn". It can be set to "default"
+  to go back to the system default card (TODO: not implemented yet). Currently,
+  only PCI is supported as a prefix, but the userland API may support other bus
+  types in the future, even if the current kernel implementation doesn't.
+
+Note about locks:
+
+The driver keeps track of which user has which locks on which card. It
+supports stacking, like the kernel one. This complexifies the implementation
+a bit, but makes the arbiter more tolerant to user space problems and able
+to properly cleanup in all cases when a process dies.
+Currently, a max of 16 cards can have locks simultaneously issued from
+user space for a given user (file descriptor instance) of the arbiter.
+
+In the case of devices hot-{un,}plugged, there is a hook - pci_notify() - to
+notify them being added/removed in the system and automatically added/removed
+in the arbiter.
+
+There's also a in-kernel API of the arbiter in the case of DRM, vgacon and
+others which may use the arbiter.
+
+
+I.2 libpciaccess
+----------------
+
+To use the vga arbiter char device it was implemented an API inside the
+libpciaccess library. One fieldd was added to struct pci_device (each device
+on the system):
+
+    /* the type of resource decoded by the device */
+    int vgaarb_rsrc;
+
+Besides it, in pci_system were added:
+
+    int vgaarb_fd;
+    int vga_count;
+    struct pci_device *vga_target;
+    struct pci_device *vga_default_dev;
+
+
+The vga_count is usually need to keep informed how many cards are being
+arbitrated, so for instance if there's only one then it can totally escape the
+scheme.
+
+
+These functions below acquire VGA resources for the given card and mark those
+resources as locked. If the resources requested are "normal" (and not legacy)
+resources, the arbiter will first check whether the card is doing legacy
+decoding for that type of resource. If yes, the lock is "converted" into a
+legacy resource lock. The arbiter will first look for all VGA cards that
+might conflict and disable their IOs and/or Memory access, including VGA
+forwarding on P2P bridges if necessary, so that the requested resources can
+be used. Then, the card is marked as locking these resources and the IO and/or
+Memory access is enabled on the card (including VGA forwarding on parent
+P2P bridges if any). In the case of vga_arb_lock(), the function will block
+if some conflicting card is already locking one of the required resources (or
+any resource on a different bus segment, since P2P bridges don't differentiate
+VGA memory and IO afaik). If the card already owns the resources, the function
+succeeds.  vga_arb_trylock() will return (-EBUSY) instead of blocking. Nested
+calls are supported (a per-resource counter is maintained).
+
+
+Set the target device of this client.
+    int  pci_device_vgaarb_set_target   (struct pci_device *dev);
+
+
+For instance, in x86 if two devices on the same bus want to lock different
+resources, both will succeed (lock). If devices are in different buses and
+trying to lock different resources, only the first who tried succeeds.
+    int  pci_device_vgaarb_lock         (void);
+    int  pci_device_vgaarb_trylock      (void);
+
+Unlock resources of device.
+    int  pci_device_vgaarb_unlock       (void);
+
+Indicates to the arbiter if the card decodes legacy VGA IOs, legacy VGA
+Memory, both, or none. All cards default to both, the card driver (fbdev for
+example) should tell the arbiter if it has disabled legacy decoding, so the
+card can be left out of the arbitration process (and can be safe to take
+interrupts at any time.
+    int  pci_device_vgaarb_decodes      (int new_vgaarb_rsrc);
+
+Connects to the arbiter device, allocates the struct
+    int  pci_device_vgaarb_init         (void);
+
+Close the connection
+    void pci_device_vgaarb_fini         (void);
+
+
+I.3 xf86VGAArbiter (X server implementation)
+--------------------------------------------
+
+(TODO)
+
+X server basically wraps all the functions that touch VGA registers somehow.
+
+
+II. Credits
+===========
+
+Benjamin Herrenschmidt (IBM?) started this work when he discussed such design
+with the Xorg community in 2005 [1, 2]. In the end of 2007, Paulo Zanoni and
+Tiago Vignatti (both of C3SL/Federal University of Paraná) proceeded his work
+enhancing the kernel code to adapt as a kernel module and also did the
+implementation of the user space side [3]. Now (2009) Tiago Vignatti and Dave
+Airlie finally put this work in shape and queued to Jesse Barnes' PCI tree.
+
+
+III. References
+==============
+
+[0] http://cgit.freedesktop.org/xorg/xserver/commit/?id=4b42448a2388d40f257774fbffdccaea87bd0347
+[1] http://lists.freedesktop.org/archives/xorg/2005-March/006663.html
+[2] http://lists.freedesktop.org/archives/xorg/2005-March/006745.html
+[3] http://lists.freedesktop.org/archives/xorg/2007-October/029507.html

arch/alpha/include/asm/pci.h

@@ -52,7 +52,6 @@ struct pci_controller {
    bus numbers.  */
 
 #define pcibios_assign_all_busses()	1
-#define pcibios_scan_all_fns(a, b)	0
 
 #define PCIBIOS_MIN_IO		alpha_mv.min_io_address
 #define PCIBIOS_MIN_MEM		alpha_mv.min_mem_address

arch/arm/include/asm/pci.h

@@ -6,8 +6,6 @@
 
 #include <mach/hardware.h> /* for PCIBIOS_MIN_* */
 
-#define pcibios_scan_all_fns(a, b)	0
-
 #ifdef CONFIG_PCI_HOST_ITE8152
 /* ITE bridge requires setting latency timer to avoid early bus access
    termination by PIC bus mater devices

arch/frv/mb93090-mb00/pci-frv.c

@@ -86,7 +86,7 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
 	struct pci_bus *bus;
 	struct pci_dev *dev;
 	int idx;
-	struct resource *r, *pr;
+	struct resource *r;
 
 	/* Depth-First Search on bus tree */
 	for (ln=bus_list->next; ln != bus_list; ln=ln->next) {
@@ -96,8 +96,7 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
 				r = &dev->resource[idx];
 				if (!r->start)
 					continue;
-				pr = pci_find_parent_resource(dev, r);
-				if (!pr || request_resource(pr, r) < 0)
+				if (pci_claim_resource(dev, idx) < 0)
 					printk(KERN_ERR "PCI: Cannot allocate resource region %d of bridge %s\n", idx, pci_name(dev));
 			}
 		}
@@ -110,7 +109,7 @@ static void __init pcibios_allocate_resources(int pass)
 	struct pci_dev *dev = NULL;
 	int idx, disabled;
 	u16 command;
-	struct resource *r, *pr;
+	struct resource *r;
 
 	for_each_pci_dev(dev) {
 		pci_read_config_word(dev, PCI_COMMAND, &command);
@@ -127,8 +126,7 @@ static void __init pcibios_allocate_resources(int pass)
 			if (pass == disabled) {
 				DBG("PCI: Resource %08lx-%08lx (f=%lx, d=%d, p=%d)\n",
 				    r->start, r->end, r->flags, disabled, pass);
-				pr = pci_find_parent_resource(dev, r);
-				if (!pr || request_resource(pr, r) < 0) {
+				if (pci_claim_resource(dev, idx) < 0) {
 					printk(KERN_ERR "PCI: Cannot allocate resource region %d of device %s\n", idx, pci_name(dev));
 					/* We'll assign a new address later */
 					r->end -= r->start;

arch/h8300/include/asm/pci.h

@@ -8,7 +8,6 @@
  */
 
 #define pcibios_assign_all_busses()	0
-#define pcibios_scan_all_fns(a, b)	0
 
 static inline void pcibios_set_master(struct pci_dev *dev)
 {

arch/ia64/include/asm/pci.h

@@ -17,7 +17,6 @@
  * loader.
  */
 #define pcibios_assign_all_busses()     0
-#define pcibios_scan_all_fns(a, b)	0
 
 #define PCIBIOS_MIN_IO		0x1000
 #define PCIBIOS_MIN_MEM		0x10000000
@@ -135,7 +134,18 @@ extern void pcibios_resource_to_bus(struct pci_dev *dev,
 extern void pcibios_bus_to_resource(struct pci_dev *dev,
 		struct resource *res, struct pci_bus_region *region);
 
-#define pcibios_scan_all_fns(a, b)	0
+static inline struct resource *
+pcibios_select_root(struct pci_dev *pdev, struct resource *res)
+{
+	struct resource *root = NULL;
+
+	if (res->flags & IORESOURCE_IO)
+		root = &ioport_resource;
+	if (res->flags & IORESOURCE_MEM)
+		root = &iomem_resource;
+
+	return root;
+}
 
 #define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)

arch/mips/include/asm/pci.h

@@ -65,8 +65,6 @@ extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
 
 extern unsigned int pcibios_assign_all_busses(void);
 
-#define pcibios_scan_all_fns(a, b)	0
-
 extern unsigned long PCIBIOS_MIN_IO;
 extern unsigned long PCIBIOS_MIN_MEM;
 

arch/mn10300/include/asm/pci.h

@@ -101,7 +101,18 @@ extern void pcibios_bus_to_resource(struct pci_dev *dev,
 				    struct resource *res,
 				    struct pci_bus_region *region);
 
-#define pcibios_scan_all_fns(a, b)	0
+static inline struct resource *
+pcibios_select_root(struct pci_dev *pdev, struct resource *res)
+{
+	struct resource *root = NULL;
+
+	if (res->flags & IORESOURCE_IO)
+		root = &ioport_resource;
+	if (res->flags & IORESOURCE_MEM)
+		root = &iomem_resource;
+
+	return root;
+}
 
 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 {

arch/parisc/include/asm/pci.h

@@ -233,7 +233,6 @@ static inline void pcibios_register_hba(struct pci_hba_data *x)
  *   rp7420/8420 boxes and then revisit this issue.
  */
 #define pcibios_assign_all_busses()     (1)
-#define pcibios_scan_all_fns(a, b)	(0)
 
 #define PCIBIOS_MIN_IO          0x10
 #define PCIBIOS_MIN_MEM         0x1000 /* NBPG - but pci/setup-res.c dies */

arch/powerpc/include/asm/pci.h

@@ -45,7 +45,6 @@ struct pci_dev;
  */
 #define pcibios_assign_all_busses() \
 	(ppc_pci_has_flag(PPC_PCI_REASSIGN_ALL_BUS))
-#define pcibios_scan_all_fns(a, b)	0
 
 static inline void pcibios_set_master(struct pci_dev *dev)
 {

arch/powerpc/kernel/pci_of_scan.c

@@ -139,6 +139,7 @@ struct pci_dev *of_create_pci_dev(struct device_node *node,
 	dev->dev.bus = &pci_bus_type;
 	dev->devfn = devfn;
 	dev->multifunction = 0;		/* maybe a lie? */
+	dev->needs_freset = 0;		/* pcie fundamental reset required */
 
 	dev->vendor = get_int_prop(node, "vendor-id", 0xffff);
 	dev->device = get_int_prop(node, "device-id", 0xffff);

arch/powerpc/platforms/pseries/eeh.c

@@ -744,7 +744,15 @@ int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state stat
 
 static void __rtas_set_slot_reset(struct pci_dn *pdn)
 {
-	rtas_pci_slot_reset (pdn, 1);
+	struct pci_dev *dev = pdn->pcidev;
+
+	/* Determine type of EEH reset required by device,
+	 * default hot reset or fundamental reset
+	 */
+	if (dev->needs_freset)
+		rtas_pci_slot_reset(pdn, 3);
+	else
+		rtas_pci_slot_reset(pdn, 1);
 
 	/* The PCI bus requires that the reset be held high for at least
 	 * a 100 milliseconds. We wait a bit longer 'just in case'.  */

arch/sh/include/asm/pci.h

@@ -10,7 +10,6 @@
    or architectures with incomplete PCI setup by the loader */
 
 #define pcibios_assign_all_busses()	1
-#define pcibios_scan_all_fns(a, b)	0
 
 /*
  * A board can define one or more PCI channels that represent built-in (or

arch/sparc/include/asm/pci_32.h

@@ -10,7 +10,6 @@
  * or architectures with incomplete PCI setup by the loader.
  */
 #define pcibios_assign_all_busses()	0
-#define pcibios_scan_all_fns(a, b)	0
 
 #define PCIBIOS_MIN_IO		0UL
 #define PCIBIOS_MIN_MEM		0UL

arch/sparc/include/asm/pci_64.h

@@ -10,7 +10,6 @@
  * or architectures with incomplete PCI setup by the loader.
  */
 #define pcibios_assign_all_busses()	0
-#define pcibios_scan_all_fns(a, b)	0
 
 #define PCIBIOS_MIN_IO		0UL
 #define PCIBIOS_MIN_MEM		0UL

arch/um/include/asm/pci.h

@@ -2,6 +2,5 @@
 #define __UM_PCI_H
 
 #define PCI_DMA_BUS_IS_PHYS     (1)
-#define pcibios_scan_all_fns(a, b)	0
 
 #endif

arch/x86/include/asm/pci.h

@@ -48,7 +48,6 @@ extern unsigned int pcibios_assign_all_busses(void);
 #else
 #define pcibios_assign_all_busses()	0
 #endif
-#define pcibios_scan_all_fns(a, b)	0
 
 extern unsigned long pci_mem_start;
 #define PCIBIOS_MIN_IO		0x1000

arch/x86/kernel/pci-dma.c

@@ -225,10 +225,8 @@ static __init int iommu_setup(char *p)
 		if (!strncmp(p, "soft", 4))
 			swiotlb = 1;
 #endif
-		if (!strncmp(p, "pt", 2)) {
+		if (!strncmp(p, "pt", 2))
 			iommu_pass_through = 1;
-			return 1;
-		}
 
 		gart_parse_options(p);
 

arch/x86/kernel/quirks.c

@@ -508,7 +508,7 @@ static void __init quirk_amd_nb_node(struct pci_dev *dev)
 
 	pci_read_config_dword(nb_ht, 0x60, &val);
 	set_dev_node(&dev->dev, val & 7);
-	pci_dev_put(dev);
+	pci_dev_put(nb_ht);
 }
 
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_K8_NB,

arch/x86/pci/amd_bus.c

@@ -15,63 +15,6 @@
  * also get peer root bus resource for io,mmio
  */
 
-#ifdef CONFIG_NUMA
-
-#define BUS_NR 256
-
-#ifdef CONFIG_X86_64
-
-static int mp_bus_to_node[BUS_NR];
-
-void set_mp_bus_to_node(int busnum, int node)
-{
-	if (busnum >= 0 &&  busnum < BUS_NR)
-		mp_bus_to_node[busnum] = node;
-}
-
-int get_mp_bus_to_node(int busnum)
-{
-	int node = -1;
-
-	if (busnum < 0 || busnum > (BUS_NR - 1))
-		return node;
-
-	node = mp_bus_to_node[busnum];
-
-	/*
-	 * let numa_node_id to decide it later in dma_alloc_pages
-	 * if there is no ram on that node
-	 */
-	if (node != -1 && !node_online(node))
-		node = -1;
-
-	return node;
-}
-
-#else /* CONFIG_X86_32 */
-
-static unsigned char mp_bus_to_node[BUS_NR];
-
-void set_mp_bus_to_node(int busnum, int node)
-{
-	if (busnum >= 0 &&  busnum < BUS_NR)
-	mp_bus_to_node[busnum] = (unsigned char) node;
-}
-
-int get_mp_bus_to_node(int busnum)
-{
-	int node;
-
-	if (busnum < 0 || busnum > (BUS_NR - 1))
-		return 0;
-	node = mp_bus_to_node[busnum];
-	return node;
-}
-
-#endif /* CONFIG_X86_32 */
-
-#endif /* CONFIG_NUMA */
-
 #ifdef CONFIG_X86_64
 
 /*
@@ -301,11 +244,6 @@ static int __init early_fill_mp_bus_info(void)
 	u64 val;
 	u32 address;
 
-#ifdef CONFIG_NUMA
-	for (i = 0; i < BUS_NR; i++)
-		mp_bus_to_node[i] = -1;
-#endif
-
 	if (!early_pci_allowed())
 		return -1;
 
@@ -346,7 +284,7 @@ static int __init early_fill_mp_bus_info(void)
 		node = (reg >> 4) & 0x07;
 #ifdef CONFIG_NUMA
 		for (j = min_bus; j <= max_bus; j++)
-			mp_bus_to_node[j] = (unsigned char) node;
+			set_mp_bus_to_node(j, node);
 #endif
 		link = (reg >> 8) & 0x03;
 

arch/x86/pci/common.c

@@ -600,3 +600,72 @@ struct pci_bus * __devinit pci_scan_bus_with_sysdata(int busno)
 {
 	return pci_scan_bus_on_node(busno, &pci_root_ops, -1);
 }
+
+/*
+ * NUMA info for PCI busses
+ *
+ * Early arch code is responsible for filling in reasonable values here.
+ * A node id of "-1" means "use current node".  In other words, if a bus
+ * has a -1 node id, it's not tightly coupled to any particular chunk
+ * of memory (as is the case on some Nehalem systems).
+ */
+#ifdef CONFIG_NUMA
+
+#define BUS_NR 256
+
+#ifdef CONFIG_X86_64
+
+static int mp_bus_to_node[BUS_NR] = {
+	[0 ... BUS_NR - 1] = -1
+};
+
+void set_mp_bus_to_node(int busnum, int node)
+{
+	if (busnum >= 0 &&  busnum < BUS_NR)
+		mp_bus_to_node[busnum] = node;
+}
+
+int get_mp_bus_to_node(int busnum)
+{
+	int node = -1;
+
+	if (busnum < 0 || busnum > (BUS_NR - 1))
+		return node;
+
+	node = mp_bus_to_node[busnum];
+
+	/*
+	 * let numa_node_id to decide it later in dma_alloc_pages
+	 * if there is no ram on that node
+	 */
+	if (node != -1 && !node_online(node))
+		node = -1;
+
+	return node;
+}
+
+#else /* CONFIG_X86_32 */
+
+static unsigned char mp_bus_to_node[BUS_NR] = {
+	[0 ... BUS_NR - 1] = -1
+};
+
+void set_mp_bus_to_node(int busnum, int node)
+{
+	if (busnum >= 0 &&  busnum < BUS_NR)
+	mp_bus_to_node[busnum] = (unsigned char) node;
+}
+
+int get_mp_bus_to_node(int busnum)
+{
+	int node;
+
+	if (busnum < 0 || busnum > (BUS_NR - 1))
+		return 0;
+	node = mp_bus_to_node[busnum];
+	return node;
+}
+
+#endif /* CONFIG_X86_32 */
+
+#endif /* CONFIG_NUMA */

drivers/acpi/pci_root.c

@@ -61,20 +61,6 @@ static struct acpi_driver acpi_pci_root_driver = {
 		},
 };
 
-struct acpi_pci_root {
-	struct list_head node;
-	struct acpi_device *device;
-	struct pci_bus *bus;
-	u16 segment;
-	u8 bus_nr;
-
-	u32 osc_support_set;	/* _OSC state of support bits */
-	u32 osc_control_set;	/* _OSC state of control bits */
-	u32 osc_control_qry;	/* the latest _OSC query result */
-
-	u32 osc_queried:1;	/* has _OSC control been queried? */
-};
-
 static LIST_HEAD(acpi_pci_roots);
 
 static struct acpi_pci_driver *sub_driver;
@@ -317,7 +303,7 @@ static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
 	return status;
 }
 
-static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
+struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
 {
 	struct acpi_pci_root *root;
 
@@ -327,6 +313,7 @@ static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
 	}
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(acpi_pci_find_root);
 
 struct acpi_handle_node {
 	struct list_head node;

drivers/acpi/power.c

@@ -44,6 +44,8 @@
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
 
+#include "sleep.h"
+
 #define _COMPONENT			ACPI_POWER_COMPONENT
 ACPI_MODULE_NAME("power");
 #define ACPI_POWER_CLASS		"power_resource"
@@ -361,17 +363,15 @@ int acpi_device_sleep_wake(struct acpi_device *dev,
  */
 int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
 {
-	int i, err;
+	int i, err = 0;
 
 	if (!dev || !dev->wakeup.flags.valid)
 		return -EINVAL;
 
-	/*
-	 * Do not execute the code below twice in a row without calling
-	 * acpi_disable_wakeup_device_power() in between for the same device
-	 */
-	if (dev->wakeup.flags.prepared)
-		return 0;
+	mutex_lock(&acpi_device_lock);
+
+	if (dev->wakeup.prepare_count++)
+		goto out;
 
 	/* Open power resource */
 	for (i = 0; i < dev->wakeup.resources.count; i++) {
@@ -379,7 +379,8 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
 		if (ret) {
 			printk(KERN_ERR PREFIX "Transition power state\n");
 			dev->wakeup.flags.valid = 0;
-			return -ENODEV;
+			err = -ENODEV;
+			goto err_out;
 		}
 	}
 
@@ -388,9 +389,13 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
 	 * in arbitrary power state afterwards.
 	 */
 	err = acpi_device_sleep_wake(dev, 1, sleep_state, 3);
-	if (!err)
-		dev->wakeup.flags.prepared = 1;
 
+ err_out:
+	if (err)
+		dev->wakeup.prepare_count = 0;
+
+ out:
+	mutex_unlock(&acpi_device_lock);
 	return err;
 }
 
@@ -402,35 +407,42 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
  */
 int acpi_disable_wakeup_device_power(struct acpi_device *dev)
 {
-	int i, ret;
+	int i, err = 0;
 
 	if (!dev || !dev->wakeup.flags.valid)
 		return -EINVAL;
 
+	mutex_lock(&acpi_device_lock);
+
+	if (--dev->wakeup.prepare_count > 0)
+		goto out;
+
 	/*
-	 * Do not execute the code below twice in a row without calling
-	 * acpi_enable_wakeup_device_power() in between for the same device
+	 * Executing the code below even if prepare_count is already zero when
+	 * the function is called may be useful, for example for initialisation.
 	 */
-	if (!dev->wakeup.flags.prepared)
-		return 0;
+	if (dev->wakeup.prepare_count < 0)
+		dev->wakeup.prepare_count = 0;
 
-	dev->wakeup.flags.prepared = 0;
-
-	ret = acpi_device_sleep_wake(dev, 0, 0, 0);
-	if (ret)
-		return ret;
+	err = acpi_device_sleep_wake(dev, 0, 0, 0);
+	if (err)
+		goto out;
 
 	/* Close power resource */
 	for (i = 0; i < dev->wakeup.resources.count; i++) {
-		ret = acpi_power_off_device(dev->wakeup.resources.handles[i], dev);
+		int ret = acpi_power_off_device(
+				dev->wakeup.resources.handles[i], dev);
 		if (ret) {
 			printk(KERN_ERR PREFIX "Transition power state\n");
 			dev->wakeup.flags.valid = 0;
-			return -ENODEV;
+			err = -ENODEV;
+			goto out;
 		}
 	}
 
-	return ret;
+ out:
+	mutex_unlock(&acpi_device_lock);
+	return err;
 }
 
 /* --------------------------------------------------------------------------

drivers/acpi/scan.c

@@ -781,6 +781,7 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
 	kfree(buffer.pointer);
 
 	device->wakeup.flags.valid = 1;
+	device->wakeup.prepare_count = 0;
 	/* Call _PSW/_DSW object to disable its ability to wake the sleeping
 	 * system for the ACPI device with the _PRW object.
 	 * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.

drivers/acpi/sleep.c

@@ -689,19 +689,25 @@ int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
 {
 	acpi_handle handle;
 	struct acpi_device *adev;
+	int error;
 
-	if (!device_may_wakeup(dev))
+	if (!device_can_wakeup(dev))
 		return -EINVAL;
 
 	handle = DEVICE_ACPI_HANDLE(dev);
 	if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
-		printk(KERN_DEBUG "ACPI handle has no context!\n");
+		dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__);
 		return -ENODEV;
 	}
 
-	return enable ?
+	error = enable ?
 		acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
 		acpi_disable_wakeup_device_power(adev);
+	if (!error)
+		dev_info(dev, "wake-up capability %s by ACPI\n",
+				enable ? "enabled" : "disabled");
+
+	return error;
 }
 #endif
 

drivers/acpi/wakeup.c

@@ -68,7 +68,7 @@ void acpi_enable_wakeup_device(u8 sleep_state)
 		/* If users want to disable run-wake GPE,
 		 * we only disable it for wake and leave it for runtime
 		 */
-		if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+		if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
 		    || sleep_state > (u32) dev->wakeup.sleep_state) {
 			if (dev->wakeup.flags.run_wake) {
 				/* set_gpe_type will disable GPE, leave it like that */
@@ -100,7 +100,7 @@ void acpi_disable_wakeup_device(u8 sleep_state)
 		if (!dev->wakeup.flags.valid)
 			continue;
 
-		if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+		if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
 		    || sleep_state > (u32) dev->wakeup.sleep_state) {
 			if (dev->wakeup.flags.run_wake) {
 				acpi_set_gpe_type(dev->wakeup.gpe_device,

drivers/gpu/Makefile

-obj-y			+= drm/
+obj-y			+= drm/ vga/

drivers/gpu/vga/Kconfig

+config VGA_ARB
+	bool "VGA Arbitration" if EMBEDDED
+	default y
+	depends on PCI
+	help
+	  Some "legacy" VGA devices implemented on PCI typically have the same
+	  hard-decoded addresses as they did on ISA. When multiple PCI devices
+	  are accessed at same time they need some kind of coordination. Please
+	  see Documentation/vgaarbiter.txt for more details. Select this to
+	  enable VGA arbiter.

drivers/gpu/vga/Makefile

+obj-$(CONFIG_VGA_ARB)  += vgaarb.o

drivers/pci/Makefile

@@ -8,6 +8,9 @@ obj-y		+= access.o bus.o probe.o remove.o pci.o quirks.o \
 obj-$(CONFIG_PROC_FS) += proc.o
 obj-$(CONFIG_SYSFS) += slot.o
 
+obj-$(CONFIG_PCI_LEGACY) += legacy.o
+CFLAGS_legacy.o += -Wno-deprecated-declarations
+
 # Build PCI Express stuff if needed
 obj-$(CONFIG_PCIEPORTBUS) += pcie/
 

drivers/pci/hotplug/acpi_pcihp.c

@@ -500,18 +500,18 @@ check_hotplug(acpi_handle handle, u32 lvl, void *context, void **rv)
 
 /**
  * acpi_pci_detect_ejectable - check if the PCI bus has ejectable slots
- * @pbus - PCI bus to scan
+ * @handle - handle of the PCI bus to scan
  *
  * Returns 1 if the PCI bus has ACPI based ejectable slots, 0 otherwise.
  */
-int acpi_pci_detect_ejectable(struct pci_bus *pbus)
+int acpi_pci_detect_ejectable(acpi_handle handle)
 {
-	acpi_handle handle;
 	int found = 0;
 
-	if (!(handle = acpi_pci_get_bridge_handle(pbus)))
-		return 0;
-	acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
+	if (!handle)
+		return found;
+
+	acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
 			    check_hotplug, (void *)&found, NULL);
 	return found;
 }

drivers/pci/hotplug/acpiphp_glue.c

@@ -261,14 +261,11 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
 
 
 /* see if it's worth looking at this bridge */
-static int detect_ejectable_slots(struct pci_bus *pbus)
+static int detect_ejectable_slots(acpi_handle handle)
 {
-	int found = acpi_pci_detect_ejectable(pbus);
+	int found = acpi_pci_detect_ejectable(handle);
 	if (!found) {
-		acpi_handle bridge_handle = acpi_pci_get_bridge_handle(pbus);
-		if (!bridge_handle)
-			return 0;
-		acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge_handle, (u32)1,
+		acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
 				    is_pci_dock_device, (void *)&found, NULL);
 	}
 	return found;
@@ -399,9 +396,10 @@ static inline void config_p2p_bridge_flags(struct acpiphp_bridge *bridge)
 
 
 /* allocate and initialize host bridge data structure */
-static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus)
+static void add_host_bridge(acpi_handle *handle)
 {
 	struct acpiphp_bridge *bridge;
+	struct acpi_pci_root *root = acpi_pci_find_root(handle);
 
 	bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
 	if (bridge == NULL)
@@ -410,7 +408,7 @@ static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus)
 	bridge->type = BRIDGE_TYPE_HOST;
 	bridge->handle = handle;
 
-	bridge->pci_bus = pci_bus;
+	bridge->pci_bus = root->bus;
 
 	spin_lock_init(&bridge->res_lock);
 
@@ -419,7 +417,7 @@ static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus)
 
 
 /* allocate and initialize PCI-to-PCI bridge data structure */
-static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev)
+static void add_p2p_bridge(acpi_handle *handle)
 {
 	struct acpiphp_bridge *bridge;
 
@@ -433,8 +431,8 @@ static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev)
 	bridge->handle = handle;
 	config_p2p_bridge_flags(bridge);
 
-	bridge->pci_dev = pci_dev_get(pci_dev);
-	bridge->pci_bus = pci_dev->subordinate;
+	bridge->pci_dev = acpi_get_pci_dev(handle);
+	bridge->pci_bus = bridge->pci_dev->subordinate;
 	if (!bridge->pci_bus) {
 		err("This is not a PCI-to-PCI bridge!\n");
 		goto err;
@@ -451,7 +449,7 @@ static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev)
 	init_bridge_misc(bridge);
 	return;
  err:
-	pci_dev_put(pci_dev);
+	pci_dev_put(bridge->pci_dev);
 	kfree(bridge);
 	return;
 }
@@ -462,39 +460,21 @@ static acpi_status
 find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
 {
 	acpi_status status;
-	acpi_handle dummy_handle;
-	unsigned long long tmp;
-	int device, function;
 	struct pci_dev *dev;
-	struct pci_bus *pci_bus = context;
-
-	status = acpi_get_handle(handle, "_ADR", &dummy_handle);
-	if (ACPI_FAILURE(status))
-		return AE_OK;		/* continue */
-
-	status = acpi_evaluate_integer(handle, "_ADR", NULL, &tmp);
-	if (ACPI_FAILURE(status)) {
-		dbg("%s: _ADR evaluation failure\n", __func__);
-		return AE_OK;
-	}
-
-	device = (tmp >> 16) & 0xffff;
-	function = tmp & 0xffff;
-
-	dev = pci_get_slot(pci_bus, PCI_DEVFN(device, function));
 
+	dev = acpi_get_pci_dev(handle);
 	if (!dev || !dev->subordinate)
 		goto out;
 
 	/* check if this bridge has ejectable slots */
-	if ((detect_ejectable_slots(dev->subordinate) > 0)) {
+	if ((detect_ejectable_slots(handle) > 0)) {
 		dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev));
-		add_p2p_bridge(handle, dev);
+		add_p2p_bridge(handle);
 	}
 
 	/* search P2P bridges under this p2p bridge */
 	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
-				     find_p2p_bridge, dev->subordinate, NULL);
+				     find_p2p_bridge, NULL, NULL);
 	if (ACPI_FAILURE(status))
 		warn("find_p2p_bridge failed (error code = 0x%x)\n", status);
 
@@ -509,9 +489,7 @@ static int add_bridge(acpi_handle handle)
 {
 	acpi_status status;
 	unsigned long long tmp;
-	int seg, bus;
 	acpi_handle dummy_handle;
-	struct pci_bus *pci_bus;
 
 	/* if the bridge doesn't have _STA, we assume it is always there */
 	status = acpi_get_handle(handle, "_STA", &dummy_handle);
@@ -526,36 +504,15 @@ static int add_bridge(acpi_handle handle)
 			return 0;
 	}
 
-	/* get PCI segment number */
-	status = acpi_evaluate_integer(handle, "_SEG", NULL, &tmp);
-
-	seg = ACPI_SUCCESS(status) ? tmp : 0;
-
-	/* get PCI bus number */
-	status = acpi_evaluate_integer(handle, "_BBN", NULL, &tmp);
-
-	if (ACPI_SUCCESS(status)) {
-		bus = tmp;
-	} else {
-		warn("can't get bus number, assuming 0\n");
-		bus = 0;
-	}
-
-	pci_bus = pci_find_bus(seg, bus);
-	if (!pci_bus) {
-		err("Can't find bus %04x:%02x\n", seg, bus);
-		return 0;
-	}
-
 	/* check if this bridge has ejectable slots */
-	if (detect_ejectable_slots(pci_bus) > 0) {
+	if (detect_ejectable_slots(handle) > 0) {
 		dbg("found PCI host-bus bridge with hot-pluggable slots\n");
-		add_host_bridge(handle, pci_bus);
+		add_host_bridge(handle);
 	}
 
 	/* search P2P bridges under this host bridge */
 	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1,
-				     find_p2p_bridge, pci_bus, NULL);
+				     find_p2p_bridge, NULL, NULL);
 
 	if (ACPI_FAILURE(status))
 		warn("find_p2p_bridge failed (error code = 0x%x)\n", status);
@@ -1387,24 +1344,23 @@ static void acpiphp_sanitize_bus(struct pci_bus *bus)
 /* Program resources in newly inserted bridge */
 static int acpiphp_configure_bridge (acpi_handle handle)
 {
-	struct pci_dev *dev;
 	struct pci_bus *bus;
 
-	dev = acpi_get_pci_dev(handle);
-	if (!dev) {
-		err("cannot get PCI domain and bus number for bridge\n");
-		return -EINVAL;
+	if (acpi_is_root_bridge(handle)) {
+		struct acpi_pci_root *root = acpi_pci_find_root(handle);
+		bus = root->bus;
+	} else {
+		struct pci_dev *pdev = acpi_get_pci_dev(handle);
+		bus = pdev->subordinate;
+		pci_dev_put(pdev);
 	}
 
-	bus = dev->bus;
-
 	pci_bus_size_bridges(bus);
 	pci_bus_assign_resources(bus);
 	acpiphp_sanitize_bus(bus);
 	acpiphp_set_hpp_values(handle, bus);
 	pci_enable_bridges(bus);
 	acpiphp_configure_ioapics(handle);
-	pci_dev_put(dev);
 	return 0;
 }
 

drivers/pci/hotplug/pci_hotplug_core.c

@@ -86,7 +86,8 @@ static char *pci_bus_speed_strings[] = {
 	"66 MHz PCIX 533",	/* 0x11 */
 	"100 MHz PCIX 533",	/* 0x12 */
 	"133 MHz PCIX 533",	/* 0x13 */
-	"25 GBps PCI-E",	/* 0x14 */
+	"2.5 GT/s PCI-E",	/* 0x14 */
+	"5.0 GT/s PCI-E",	/* 0x15 */
 };
 
 #ifdef CONFIG_HOTPLUG_PCI_CPCI

drivers/pci/hotplug/pciehp_acpi.c

@@ -47,7 +47,7 @@ int pciehp_acpi_slot_detection_check(struct pci_dev *dev)
 {
 	if (slot_detection_mode != PCIEHP_DETECT_ACPI)
 		return 0;
-	if (acpi_pci_detect_ejectable(dev->subordinate))
+	if (acpi_pci_detect_ejectable(DEVICE_ACPI_HANDLE(&dev->dev)))
 		return 0;
 	return -ENODEV;
 }
@@ -76,9 +76,9 @@ static int __init dummy_probe(struct pcie_device *dev)
 {
 	int pos;
 	u32 slot_cap;
+	acpi_handle handle;
 	struct slot *slot, *tmp;
 	struct pci_dev *pdev = dev->port;
-	struct pci_bus *pbus = pdev->subordinate;
 	/* Note: pciehp_detect_mode != PCIEHP_DETECT_ACPI here */
 	if (pciehp_get_hp_hw_control_from_firmware(pdev))
 		return -ENODEV;
@@ -94,7 +94,8 @@ static int __init dummy_probe(struct pcie_device *dev)
 			dup_slot_id++;
 	}
 	list_add_tail(&slot->slot_list, &dummy_slots);
-	if (!acpi_slot_detected && acpi_pci_detect_ejectable(pbus))
+	handle = DEVICE_ACPI_HANDLE(&pdev->dev);
+	if (!acpi_slot_detected && acpi_pci_detect_ejectable(handle))
 		acpi_slot_detected = 1;
 	return -ENODEV;         /* dummy driver always returns error */
 }

drivers/pci/hotplug/pciehp_ctrl.c

@@ -246,11 +246,6 @@ static int board_added(struct slot *p_slot)
 		goto err_exit;
 	}
 
-	/*
-	 * Some PCI Express root ports require fixup after hot-plug operation.
-	 */
-	if (pcie_mch_quirk)
-		pci_fixup_device(pci_fixup_final, ctrl->pci_dev);
 	if (PWR_LED(ctrl))
   		p_slot->hpc_ops->green_led_on(p_slot);
 

drivers/pci/hotplug/pciehp_hpc.c

@@ -693,7 +693,10 @@ static int hpc_get_max_lnk_speed(struct slot *slot, enum pci_bus_speed *value)
 
 	switch (lnk_cap & 0x000F) {
 	case 1:
-		lnk_speed = PCIE_2PT5GB;
+		lnk_speed = PCIE_2_5GB;
+		break;
+	case 2:
+		lnk_speed = PCIE_5_0GB;
 		break;
 	default:
 		lnk_speed = PCIE_LNK_SPEED_UNKNOWN;
@@ -772,7 +775,10 @@ static int hpc_get_cur_lnk_speed(struct slot *slot, enum pci_bus_speed *value)
 
 	switch (lnk_status & PCI_EXP_LNKSTA_CLS) {
 	case 1:
-		lnk_speed = PCIE_2PT5GB;
+		lnk_speed = PCIE_2_5GB;
+		break;
+	case 2:
+		lnk_speed = PCIE_5_0GB;
 		break;
 	default:
 		lnk_speed = PCIE_LNK_SPEED_UNKNOWN;

drivers/pci/hotplug/pciehp_pci.c

@@ -285,11 +285,6 @@ int pciehp_unconfigure_device(struct slot *p_slot)
 		}
 		pci_dev_put(temp);
 	}
-	/*
-	 * Some PCI Express root ports require fixup after hot-plug operation.
-	 */
-	if (pcie_mch_quirk)
-		pci_fixup_device(pci_fixup_final, p_slot->ctrl->pci_dev);
 
 	return rc;
 }

drivers/pci/legacy.c

+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include "pci.h"
+
+/**
+ * pci_find_device - begin or continue searching for a PCI device by vendor/device id
+ * @vendor: PCI vendor id to match, or %PCI_ANY_ID to match all vendor ids
+ * @device: PCI device id to match, or %PCI_ANY_ID to match all device ids
+ * @from: Previous PCI device found in search, or %NULL for new search.
+ *
+ * Iterates through the list of known PCI devices.  If a PCI device is found
+ * with a matching @vendor and @device, a pointer to its device structure is
+ * returned.  Otherwise, %NULL is returned.
+ * A new search is initiated by passing %NULL as the @from argument.
+ * Otherwise if @from is not %NULL, searches continue from next device
+ * on the global list.
+ *
+ * NOTE: Do not use this function any more; use pci_get_device() instead, as
+ * the PCI device returned by this function can disappear at any moment in
+ * time.
+ */
+struct pci_dev *pci_find_device(unsigned int vendor, unsigned int device,
+				struct pci_dev *from)
+{
+	struct pci_dev *pdev;
+
+	pci_dev_get(from);
+	pdev = pci_get_subsys(vendor, device, PCI_ANY_ID, PCI_ANY_ID, from);
+	pci_dev_put(pdev);
+	return pdev;
+}
+EXPORT_SYMBOL(pci_find_device);

drivers/pci/pci-acpi.c

@@ -109,15 +109,32 @@ static bool acpi_pci_can_wakeup(struct pci_dev *dev)
 	return handle ? acpi_bus_can_wakeup(handle) : false;
 }
 
+static void acpi_pci_propagate_wakeup_enable(struct pci_bus *bus, bool enable)
+{
+	while (bus->parent) {
+		struct pci_dev *bridge = bus->self;
+		int ret;
+
+		ret = acpi_pm_device_sleep_wake(&bridge->dev, enable);
+		if (!ret || bridge->is_pcie)
+			return;
+		bus = bus->parent;
+	}
+
+	/* We have reached the root bus. */
+	if (bus->bridge)
+		acpi_pm_device_sleep_wake(bus->bridge, enable);
+}
+
 static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
 {
-	int error = acpi_pm_device_sleep_wake(&dev->dev, enable);
+	if (acpi_pci_can_wakeup(dev))
+		return acpi_pm_device_sleep_wake(&dev->dev, enable);
 
-	if (!error)
-		dev_printk(KERN_INFO, &dev->dev,
-				"wake-up capability %s by ACPI\n",
-				enable ? "enabled" : "disabled");
-	return error;
+	if (!dev->is_pcie)
+		acpi_pci_propagate_wakeup_enable(dev->bus, enable);
+
+	return 0;
 }
 
 static struct pci_platform_pm_ops acpi_pci_platform_pm = {

drivers/pci/pci-driver.c

@@ -19,37 +19,98 @@
 #include <linux/cpu.h>
 #include "pci.h"
 
-/*
- * Dynamic device IDs are disabled for !CONFIG_HOTPLUG
- */
-
 struct pci_dynid {
 	struct list_head node;
 	struct pci_device_id id;
 };
 
-#ifdef CONFIG_HOTPLUG
+/**
+ * pci_add_dynid - add a new PCI device ID to this driver and re-probe devices
+ * @drv: target pci driver
+ * @vendor: PCI vendor ID
+ * @device: PCI device ID
+ * @subvendor: PCI subvendor ID
+ * @subdevice: PCI subdevice ID
+ * @class: PCI class
+ * @class_mask: PCI class mask
+ * @driver_data: private driver data
+ *
+ * Adds a new dynamic pci device ID to this driver and causes the
+ * driver to probe for all devices again.  @drv must have been
+ * registered prior to calling this function.
+ *
+ * CONTEXT:
+ * Does GFP_KERNEL allocation.
+ *
+ * RETURNS:
+ * 0 on success, -errno on failure.
+ */
+int pci_add_dynid(struct pci_driver *drv,
+		  unsigned int vendor, unsigned int device,
+		  unsigned int subvendor, unsigned int subdevice,
+		  unsigned int class, unsigned int class_mask,
+		  unsigned long driver_data)
+{
+	struct pci_dynid *dynid;
+	int retval;
+
+	dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
+	if (!dynid)
+		return -ENOMEM;
+
+	dynid->id.vendor = vendor;
+	dynid->id.device = device;
+	dynid->id.subvendor = subvendor;
+	dynid->id.subdevice = subdevice;
+	dynid->id.class = class;
+	dynid->id.class_mask = class_mask;
+	dynid->id.driver_data = driver_data;
+
+	spin_lock(&drv->dynids.lock);
+	list_add_tail(&dynid->node, &drv->dynids.list);
+	spin_unlock(&drv->dynids.lock);
+
+	get_driver(&drv->driver);
+	retval = driver_attach(&drv->driver);
+	put_driver(&drv->driver);
+
+	return retval;
+}
+
+static void pci_free_dynids(struct pci_driver *drv)
+{
+	struct pci_dynid *dynid, *n;
 
+	spin_lock(&drv->dynids.lock);
+	list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
+		list_del(&dynid->node);
+		kfree(dynid);
+	}
+	spin_unlock(&drv->dynids.lock);
+}
+
+/*
+ * Dynamic device ID manipulation via sysfs is disabled for !CONFIG_HOTPLUG
+ */
+#ifdef CONFIG_HOTPLUG
 /**
- * store_new_id - add a new PCI device ID to this driver and re-probe devices
+ * store_new_id - sysfs frontend to pci_add_dynid()
  * @driver: target device driver
  * @buf: buffer for scanning device ID data
  * @count: input size
  *
- * Adds a new dynamic pci device ID to this driver,
- * and causes the driver to probe for all devices again.
+ * Allow PCI IDs to be added to an existing driver via sysfs.
  */
 static ssize_t
 store_new_id(struct device_driver *driver, const char *buf, size_t count)
 {
-	struct pci_dynid *dynid;
 	struct pci_driver *pdrv = to_pci_driver(driver);
 	const struct pci_device_id *ids = pdrv->id_table;
 	__u32 vendor, device, subvendor=PCI_ANY_ID,
 		subdevice=PCI_ANY_ID, class=0, class_mask=0;
 	unsigned long driver_data=0;
 	int fields=0;
-	int retval=0;
+	int retval;
 
 	fields = sscanf(buf, "%x %x %x %x %x %x %lx",
 			&vendor, &device, &subvendor, &subdevice,
@@ -72,27 +133,8 @@ store_new_id(struct device_driver *driver, const char *buf, size_t count)
 			return retval;
 	}
 
-	dynid = kzalloc(sizeof(*dynid), GFP_KERNEL);
-	if (!dynid)
-		return -ENOMEM;
-
-	dynid->id.vendor = vendor;
-	dynid->id.device = device;
-	dynid->id.subvendor = subvendor;
-	dynid->id.subdevice = subdevice;
-	dynid->id.class = class;
-	dynid->id.class_mask = class_mask;
-	dynid->id.driver_data = driver_data;
-
-	spin_lock(&pdrv->dynids.lock);
-	list_add_tail(&dynid->node, &pdrv->dynids.list);
-	spin_unlock(&pdrv->dynids.lock);
-
-	if (get_driver(&pdrv->driver)) {
-		retval = driver_attach(&pdrv->driver);
-		put_driver(&pdrv->driver);
-	}
-
+	retval = pci_add_dynid(pdrv, vendor, device, subvendor, subdevice,
+			       class, class_mask, driver_data);
 	if (retval)
 		return retval;
 	return count;
@@ -145,19 +187,6 @@ store_remove_id(struct device_driver *driver, const char *buf, size_t count)
 }
 static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id);
 
-static void
-pci_free_dynids(struct pci_driver *drv)
-{
-	struct pci_dynid *dynid, *n;
-
-	spin_lock(&drv->dynids.lock);
-	list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) {
-		list_del(&dynid->node);
-		kfree(dynid);
-	}
-	spin_unlock(&drv->dynids.lock);
-}
-
 static int
 pci_create_newid_file(struct pci_driver *drv)
 {
@@ -186,7 +215,6 @@ static void pci_remove_removeid_file(struct pci_driver *drv)
 	driver_remove_file(&drv->driver, &driver_attr_remove_id);
 }
 #else /* !CONFIG_HOTPLUG */
-static inline void pci_free_dynids(struct pci_driver *drv) {}
 static inline int pci_create_newid_file(struct pci_driver *drv)
 {
 	return 0;
@@ -417,8 +445,6 @@ static int pci_legacy_suspend(struct device *dev, pm_message_t state)
 	struct pci_dev * pci_dev = to_pci_dev(dev);
 	struct pci_driver * drv = pci_dev->driver;
 
-	pci_dev->state_saved = false;
-
 	if (drv && drv->suspend) {
 		pci_power_t prev = pci_dev->current_state;
 		int error;
@@ -514,7 +540,6 @@ static int pci_restore_standard_config(struct pci_dev *pci_dev)
 static void pci_pm_default_resume_noirq(struct pci_dev *pci_dev)
 {
 	pci_restore_standard_config(pci_dev);
-	pci_dev->state_saved = false;
 	pci_fixup_device(pci_fixup_resume_early, pci_dev);
 }
 
@@ -580,8 +605,6 @@ static int pci_pm_suspend(struct device *dev)
 	if (pci_has_legacy_pm_support(pci_dev))
 		return pci_legacy_suspend(dev, PMSG_SUSPEND);
 
-	pci_dev->state_saved = false;
-
 	if (!pm) {
 		pci_pm_default_suspend(pci_dev);
 		goto Fixup;
@@ -694,7 +717,7 @@ static int pci_pm_resume(struct device *dev)
 		pci_pm_reenable_device(pci_dev);
 	}
 
-	return 0;
+	return error;
 }
 
 #else /* !CONFIG_SUSPEND */
@@ -716,8 +739,6 @@ static int pci_pm_freeze(struct device *dev)
 	if (pci_has_legacy_pm_support(pci_dev))
 		return pci_legacy_suspend(dev, PMSG_FREEZE);
 
-	pci_dev->state_saved = false;
-
 	if (!pm) {
 		pci_pm_default_suspend(pci_dev);
 		return 0;
@@ -793,6 +814,8 @@ static int pci_pm_thaw(struct device *dev)
 		pci_pm_reenable_device(pci_dev);
 	}
 
+	pci_dev->state_saved = false;
+
 	return error;
 }
 
@@ -804,8 +827,6 @@ static int pci_pm_poweroff(struct device *dev)
 	if (pci_has_legacy_pm_support(pci_dev))
 		return pci_legacy_suspend(dev, PMSG_HIBERNATE);
 
-	pci_dev->state_saved = false;
-
 	if (!pm) {
 		pci_pm_default_suspend(pci_dev);
 		goto Fixup;
@@ -1106,6 +1127,7 @@ static int __init pci_driver_init(void)
 
 postcore_initcall(pci_driver_init);
 
+EXPORT_SYMBOL_GPL(pci_add_dynid);
 EXPORT_SYMBOL(pci_match_id);
 EXPORT_SYMBOL(__pci_register_driver);
 EXPORT_SYMBOL(pci_unregister_driver);

drivers/pci/pci-stub.c

@@ -19,8 +19,16 @@
 #include <linux/module.h>
 #include <linux/pci.h>
 
+static char ids[1024] __initdata;
+
+module_param_string(ids, ids, sizeof(ids), 0);
+MODULE_PARM_DESC(ids, "Initial PCI IDs to add to the stub driver, format is "
+		 "\"vendor:device[:subvendor[:subdevice[:class[:class_mask]]]]\""
+		 " and multiple comma separated entries can be specified");
+
 static int pci_stub_probe(struct pci_dev *dev, const struct pci_device_id *id)
 {
+	dev_printk(KERN_INFO, &dev->dev, "claimed by stub\n");
 	return 0;
 }
 
@@ -32,7 +40,42 @@ static struct pci_driver stub_driver = {
 
 static int __init pci_stub_init(void)
 {
-	return pci_register_driver(&stub_driver);
+	char *p, *id;
+	int rc;
+
+	rc = pci_register_driver(&stub_driver);
+	if (rc)
+		return rc;
+
+	/* add ids specified in the module parameter */
+	p = ids;
+	while ((id = strsep(&p, ","))) {
+		unsigned int vendor, device, subvendor = PCI_ANY_ID,
+			subdevice = PCI_ANY_ID, class=0, class_mask=0;
+		int fields;
+
+		fields = sscanf(id, "%x:%x:%x:%x:%x:%x",
+				&vendor, &device, &subvendor, &subdevice,
+				&class, &class_mask);
+
+		if (fields < 2) {
+			printk(KERN_WARNING
+			       "pci-stub: invalid id string \"%s\"\n", id);
+			continue;
+		}
+
+		printk(KERN_INFO
+		       "pci-stub: add %04X:%04X sub=%04X:%04X cls=%08X/%08X\n",
+		       vendor, device, subvendor, subdevice, class, class_mask);
+
+		rc = pci_add_dynid(&stub_driver, vendor, device,
+				   subvendor, subdevice, class, class_mask, 0);
+		if (rc)
+			printk(KERN_WARNING
+			       "pci-stub: failed to add dynamic id (%d)\n", rc);
+	}
+
+	return 0;
 }
 
 static void __exit pci_stub_exit(void)

drivers/pci/pci-sysfs.c

@@ -916,6 +916,24 @@ int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev)
 	return 0;
 }
 
+static ssize_t reset_store(struct device *dev,
+			   struct device_attribute *attr, const char *buf,
+			   size_t count)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	unsigned long val;
+	ssize_t result = strict_strtoul(buf, 0, &val);
+
+	if (result < 0)
+		return result;
+
+	if (val != 1)
+		return -EINVAL;
+	return pci_reset_function(pdev);
+}
+
+static struct device_attribute reset_attr = __ATTR(reset, 0200, NULL, reset_store);
+
 static int pci_create_capabilities_sysfs(struct pci_dev *dev)
 {
 	int retval;
@@ -943,7 +961,22 @@ static int pci_create_capabilities_sysfs(struct pci_dev *dev)
 	/* Active State Power Management */
 	pcie_aspm_create_sysfs_dev_files(dev);
 
+	if (!pci_probe_reset_function(dev)) {
+		retval = device_create_file(&dev->dev, &reset_attr);
+		if (retval)
+			goto error;
+		dev->reset_fn = 1;
+	}
 	return 0;
+
+error:
+	pcie_aspm_remove_sysfs_dev_files(dev);
+	if (dev->vpd && dev->vpd->attr) {
+		sysfs_remove_bin_file(&dev->dev.kobj, dev->vpd->attr);
+		kfree(dev->vpd->attr);
+	}
+
+	return retval;
 }
 
 int __must_check pci_create_sysfs_dev_files (struct pci_dev *pdev)
@@ -1037,6 +1070,10 @@ static void pci_remove_capabilities_sysfs(struct pci_dev *dev)
 	}
 
 	pcie_aspm_remove_sysfs_dev_files(dev);
+	if (dev->reset_fn) {
+		device_remove_file(&dev->dev, &reset_attr);
+		dev->reset_fn = 0;
+	}
 }
 
 /**

drivers/pci/pci.c

@@ -41,6 +41,12 @@ int pci_domains_supported = 1;
 unsigned long pci_cardbus_io_size = DEFAULT_CARDBUS_IO_SIZE;
 unsigned long pci_cardbus_mem_size = DEFAULT_CARDBUS_MEM_SIZE;
 
+#define DEFAULT_HOTPLUG_IO_SIZE		(256)
+#define DEFAULT_HOTPLUG_MEM_SIZE	(2*1024*1024)
+/* pci=hpmemsize=nnM,hpiosize=nn can override this */
+unsigned long pci_hotplug_io_size  = DEFAULT_HOTPLUG_IO_SIZE;
+unsigned long pci_hotplug_mem_size = DEFAULT_HOTPLUG_MEM_SIZE;
+
 /**
  * pci_bus_max_busnr - returns maximum PCI bus number of given bus' children
  * @bus: pointer to PCI bus structure to search
@@ -848,6 +854,7 @@ pci_restore_state(struct pci_dev *dev)
 
 	if (!dev->state_saved)
 		return 0;
+
 	/* PCI Express register must be restored first */
 	pci_restore_pcie_state(dev);
 
@@ -869,6 +876,8 @@ pci_restore_state(struct pci_dev *dev)
 	pci_restore_msi_state(dev);
 	pci_restore_iov_state(dev);
 
+	dev->state_saved = false;
+
 	return 0;
 }
 
@@ -1214,30 +1223,40 @@ void pci_pme_active(struct pci_dev *dev, bool enable)
  */
 int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable)
 {
-	int error = 0;
-	bool pme_done = false;
+	int ret = 0;
 
 	if (enable && !device_may_wakeup(&dev->dev))
 		return -EINVAL;
 
+	/* Don't do the same thing twice in a row for one device. */
+	if (!!enable == !!dev->wakeup_prepared)
+		return 0;
+
 	/*
 	 * According to "PCI System Architecture" 4th ed. by Tom Shanley & Don
 	 * Anderson we should be doing PME# wake enable followed by ACPI wake
 	 * enable.  To disable wake-up we call the platform first, for symmetry.
 	 */
 
-	if (!enable && platform_pci_can_wakeup(dev))
-		error = platform_pci_sleep_wake(dev, false);
-
-	if (!enable || pci_pme_capable(dev, state)) {
-		pci_pme_active(dev, enable);
-		pme_done = true;
-	}
+	if (enable) {
+		int error;
 
-	if (enable && platform_pci_can_wakeup(dev))
+		if (pci_pme_capable(dev, state))
+			pci_pme_active(dev, true);
+		else
+			ret = 1;
 		error = platform_pci_sleep_wake(dev, true);
+		if (ret)
+			ret = error;
+		if (!ret)
+			dev->wakeup_prepared = true;
+	} else {
+		platform_pci_sleep_wake(dev, false);
+		pci_pme_active(dev, false);
+		dev->wakeup_prepared = false;
+	}
 
-	return pme_done ? 0 : error;
+	return ret;
 }
 
 /**
@@ -1356,6 +1375,7 @@ void pci_pm_init(struct pci_dev *dev)
 	int pm;
 	u16 pmc;
 
+	dev->wakeup_prepared = false;
 	dev->pm_cap = 0;
 
 	/* find PCI PM capability in list */
@@ -2261,6 +2281,22 @@ int __pci_reset_function(struct pci_dev *dev)
 }
 EXPORT_SYMBOL_GPL(__pci_reset_function);
 
+/**
+ * pci_probe_reset_function - check whether the device can be safely reset
+ * @dev: PCI device to reset
+ *
+ * Some devices allow an individual function to be reset without affecting
+ * other functions in the same device.  The PCI device must be responsive
+ * to PCI config space in order to use this function.
+ *
+ * Returns 0 if the device function can be reset or negative if the
+ * device doesn't support resetting a single function.
+ */
+int pci_probe_reset_function(struct pci_dev *dev)
+{
+	return pci_dev_reset(dev, 1);
+}
+
 /**
  * pci_reset_function - quiesce and reset a PCI device function
  * @dev: PCI device to reset
@@ -2504,6 +2540,50 @@ int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type)
 	return 0;
 }
 
+/**
+ * pci_set_vga_state - set VGA decode state on device and parents if requested
+ * @dev the PCI device
+ * @decode - true = enable decoding, false = disable decoding
+ * @command_bits PCI_COMMAND_IO and/or PCI_COMMAND_MEMORY
+ * @change_bridge - traverse ancestors and change bridges
+ */
+int pci_set_vga_state(struct pci_dev *dev, bool decode,
+		      unsigned int command_bits, bool change_bridge)
+{
+	struct pci_bus *bus;
+	struct pci_dev *bridge;
+	u16 cmd;
+
+	WARN_ON(command_bits & ~(PCI_COMMAND_IO|PCI_COMMAND_MEMORY));
+
+	pci_read_config_word(dev, PCI_COMMAND, &cmd);
+	if (decode == true)
+		cmd |= command_bits;
+	else
+		cmd &= ~command_bits;
+	pci_write_config_word(dev, PCI_COMMAND, cmd);
+
+	if (change_bridge == false)
+		return 0;
+
+	bus = dev->bus;
+	while (bus) {
+		bridge = bus->self;
+		if (bridge) {
+			pci_read_config_word(bridge, PCI_BRIDGE_CONTROL,
+					     &cmd);
+			if (decode == true)
+				cmd |= PCI_BRIDGE_CTL_VGA;
+			else
+				cmd &= ~PCI_BRIDGE_CTL_VGA;
+			pci_write_config_word(bridge, PCI_BRIDGE_CONTROL,
+					      cmd);
+		}
+		bus = bus->parent;
+	}
+	return 0;
+}
+
 #define RESOURCE_ALIGNMENT_PARAM_SIZE COMMAND_LINE_SIZE
 static char resource_alignment_param[RESOURCE_ALIGNMENT_PARAM_SIZE] = {0};
 spinlock_t resource_alignment_lock = SPIN_LOCK_UNLOCKED;
@@ -2672,6 +2752,10 @@ static int __init pci_setup(char *str)
 							strlen(str + 19));
 			} else if (!strncmp(str, "ecrc=", 5)) {
 				pcie_ecrc_get_policy(str + 5);
+			} else if (!strncmp(str, "hpiosize=", 9)) {
+				pci_hotplug_io_size = memparse(str + 9, &str);
+			} else if (!strncmp(str, "hpmemsize=", 10)) {
+				pci_hotplug_mem_size = memparse(str + 10, &str);
 			} else {
 				printk(KERN_ERR "PCI: Unknown option `%s'\n",
 						str);

drivers/pci/pci.h

@@ -16,6 +16,7 @@ extern void pci_cleanup_rom(struct pci_dev *dev);
 extern int pci_mmap_fits(struct pci_dev *pdev, int resno,
 			 struct vm_area_struct *vma);
 #endif
+int pci_probe_reset_function(struct pci_dev *dev);
 
 /**
  * struct pci_platform_pm_ops - Firmware PM callbacks
@@ -133,7 +134,6 @@ static inline int pci_no_d1d2(struct pci_dev *dev)
 	return (dev->no_d1d2 || parent_dstates);
 
 }
-extern int pcie_mch_quirk;
 extern struct device_attribute pci_dev_attrs[];
 extern struct device_attribute dev_attr_cpuaffinity;
 extern struct device_attribute dev_attr_cpulistaffinity;

drivers/pci/pcie/aer/aer_inject.c

@@ -22,11 +22,10 @@
 #include <linux/miscdevice.h>
 #include <linux/pci.h>
 #include <linux/fs.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include "aerdrv.h"
 
-struct aer_error_inj
-{
+struct aer_error_inj {
 	u8 bus;
 	u8 dev;
 	u8 fn;
@@ -38,8 +37,7 @@ struct aer_error_inj
 	u32 header_log3;
 };
 
-struct aer_error
-{
+struct aer_error {
 	struct list_head list;
 	unsigned int bus;
 	unsigned int devfn;
@@ -55,8 +53,7 @@ struct aer_error
 	u32 source_id;
 };
 
-struct pci_bus_ops
-{
+struct pci_bus_ops {
 	struct list_head list;
 	struct pci_bus *bus;
 	struct pci_ops *ops;
@@ -150,7 +147,7 @@ static u32 *find_pci_config_dword(struct aer_error *err, int where,
 		target = &err->header_log1;
 		break;
 	case PCI_ERR_HEADER_LOG+8:
-	        target = &err->header_log2;
+		target = &err->header_log2;
 		break;
 	case PCI_ERR_HEADER_LOG+12:
 		target = &err->header_log3;
@@ -258,8 +255,7 @@ static int pci_bus_set_aer_ops(struct pci_bus *bus)
 	bus_ops = NULL;
 out:
 	spin_unlock_irqrestore(&inject_lock, flags);
-	if (bus_ops)
-		kfree(bus_ops);
+	kfree(bus_ops);
 	return 0;
 }
 
@@ -401,10 +397,8 @@ static int aer_inject(struct aer_error_inj *einj)
 	else
 		ret = -EINVAL;
 out_put:
-	if (err_alloc)
-		kfree(err_alloc);
-	if (rperr_alloc)
-		kfree(rperr_alloc);
+	kfree(err_alloc);
+	kfree(rperr_alloc);
 	pci_dev_put(dev);
 	return ret;
 }
@@ -458,8 +452,7 @@ static void __exit aer_inject_exit(void)
 	}
 
 	spin_lock_irqsave(&inject_lock, flags);
-	list_for_each_entry_safe(err, err_next,
-				 &pci_bus_ops_list, list) {
+	list_for_each_entry_safe(err, err_next, &pci_bus_ops_list, list) {
 		list_del(&err->list);
 		kfree(err);
 	}

drivers/pci/pcie/aer/aerdrv.c

@@ -38,7 +38,7 @@ MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 
-static int __devinit aer_probe (struct pcie_device *dev);
+static int __devinit aer_probe(struct pcie_device *dev);
 static void aer_remove(struct pcie_device *dev);
 static pci_ers_result_t aer_error_detected(struct pci_dev *dev,
 	enum pci_channel_state error);
@@ -47,7 +47,7 @@ static pci_ers_result_t aer_root_reset(struct pci_dev *dev);
 
 static struct pci_error_handlers aer_error_handlers = {
 	.error_detected = aer_error_detected,
-	.resume = aer_error_resume,
+	.resume		= aer_error_resume,
 };
 
 static struct pcie_port_service_driver aerdriver = {
@@ -134,12 +134,12 @@ EXPORT_SYMBOL_GPL(aer_irq);
  *
  * Invoked when Root Port's AER service is loaded.
  **/
-static struct aer_rpc* aer_alloc_rpc(struct pcie_device *dev)
+static struct aer_rpc *aer_alloc_rpc(struct pcie_device *dev)
 {
 	struct aer_rpc *rpc;
 
-	if (!(rpc = kzalloc(sizeof(struct aer_rpc),
-		GFP_KERNEL)))
+	rpc = kzalloc(sizeof(struct aer_rpc), GFP_KERNEL);
+	if (!rpc)
 		return NULL;
 
 	/*
@@ -189,26 +189,28 @@ static void aer_remove(struct pcie_device *dev)
  *
  * Invoked when PCI Express bus loads AER service driver.
  **/
-static int __devinit aer_probe (struct pcie_device *dev)
+static int __devinit aer_probe(struct pcie_device *dev)
 {
 	int status;
 	struct aer_rpc *rpc;
 	struct device *device = &dev->device;
 
 	/* Init */
-	if ((status = aer_init(dev)))
+	status = aer_init(dev);
+	if (status)
 		return status;
 
 	/* Alloc rpc data structure */
-	if (!(rpc = aer_alloc_rpc(dev))) {
+	rpc = aer_alloc_rpc(dev);
+	if (!rpc) {
 		dev_printk(KERN_DEBUG, device, "alloc rpc failed\n");
 		aer_remove(dev);
 		return -ENOMEM;
 	}
 
 	/* Request IRQ ISR */
-	if ((status = request_irq(dev->irq, aer_irq, IRQF_SHARED, "aerdrv",
-				dev))) {
+	status = request_irq(dev->irq, aer_irq, IRQF_SHARED, "aerdrv", dev);
+	if (status) {
 		dev_printk(KERN_DEBUG, device, "request IRQ failed\n");
 		aer_remove(dev);
 		return status;

drivers/pci/pcie/aer/aerdrv.h

@@ -16,12 +16,9 @@
 #define AER_NONFATAL			0
 #define AER_FATAL			1
 #define AER_CORRECTABLE			2
-#define AER_UNCORRECTABLE		4
-#define AER_ERROR_MASK			0x001fffff
-#define AER_ERROR(d)			(d & AER_ERROR_MASK)
 
 /* Root Error Status Register Bits */
-#define ROOT_ERR_STATUS_MASKS			0x0f
+#define ROOT_ERR_STATUS_MASKS		0x0f
 
 #define SYSTEM_ERROR_INTR_ON_MESG_MASK	(PCI_EXP_RTCTL_SECEE|	\
 					PCI_EXP_RTCTL_SENFEE|	\
@@ -32,8 +29,6 @@
 #define ERR_COR_ID(d)			(d & 0xffff)
 #define ERR_UNCOR_ID(d)			(d >> 16)
 
-#define AER_SUCCESS			0
-#define AER_UNSUCCESS			1
 #define AER_ERROR_SOURCES_MAX		100
 
 #define AER_LOG_TLP_MASKS		(PCI_ERR_UNC_POISON_TLP|	\
@@ -43,13 +38,6 @@
 					PCI_ERR_UNC_UNX_COMP|		\
 					PCI_ERR_UNC_MALF_TLP)
 
-/* AER Error Info Flags */
-#define AER_TLP_HEADER_VALID_FLAG	0x00000001
-#define AER_MULTI_ERROR_VALID_FLAG	0x00000002
-
-#define ERR_CORRECTABLE_ERROR_MASK	0x000031c1
-#define ERR_UNCORRECTABLE_ERROR_MASK	0x001ff010
-
 struct header_log_regs {
 	unsigned int dw0;
 	unsigned int dw1;
@@ -61,11 +49,20 @@ struct header_log_regs {
 struct aer_err_info {
 	struct pci_dev *dev[AER_MAX_MULTI_ERR_DEVICES];
 	int error_dev_num;
-	u16 id;
-	int severity;			/* 0:NONFATAL | 1:FATAL | 2:COR */
-	int flags;
+
+	unsigned int id:16;
+
+	unsigned int severity:2;	/* 0:NONFATAL | 1:FATAL | 2:COR */
+	unsigned int __pad1:5;
+	unsigned int multi_error_valid:1;
+
+	unsigned int first_error:5;
+	unsigned int __pad2:2;
+	unsigned int tlp_header_valid:1;
+
 	unsigned int status;		/* COR/UNCOR Error Status */
-	struct header_log_regs tlp; 	/* TLP Header */
+	unsigned int mask;		/* COR/UNCOR Error Mask */
+	struct header_log_regs tlp;	/* TLP Header */
 };
 
 struct aer_err_source {
@@ -125,6 +122,7 @@ extern void aer_delete_rootport(struct aer_rpc *rpc);
 extern int aer_init(struct pcie_device *dev);
 extern void aer_isr(struct work_struct *work);
 extern void aer_print_error(struct pci_dev *dev, struct aer_err_info *info);
+extern void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info);
 extern irqreturn_t aer_irq(int irq, void *context);
 
 #ifdef CONFIG_ACPI
@@ -136,4 +134,4 @@ static inline int aer_osc_setup(struct pcie_device *pciedev)
 }
 #endif
 
-#endif //_AERDRV_H_
+#endif /* _AERDRV_H_ */

drivers/pci/pcie/aer/aerdrv_core.c

@@ -49,10 +49,11 @@ int pci_enable_pcie_error_reporting(struct pci_dev *dev)
 		PCI_EXP_DEVCTL_NFERE |
 		PCI_EXP_DEVCTL_FERE |
 		PCI_EXP_DEVCTL_URRE;
-	pci_write_config_word(dev, pos+PCI_EXP_DEVCTL,
-			reg16);
+	pci_write_config_word(dev, pos+PCI_EXP_DEVCTL, reg16);
+
 	return 0;
 }
+EXPORT_SYMBOL_GPL(pci_enable_pcie_error_reporting);
 
 int pci_disable_pcie_error_reporting(struct pci_dev *dev)
 {
@@ -68,10 +69,11 @@ int pci_disable_pcie_error_reporting(struct pci_dev *dev)
 			PCI_EXP_DEVCTL_NFERE |
 			PCI_EXP_DEVCTL_FERE |
 			PCI_EXP_DEVCTL_URRE);
-	pci_write_config_word(dev, pos+PCI_EXP_DEVCTL,
-			reg16);
+	pci_write_config_word(dev, pos+PCI_EXP_DEVCTL, reg16);
+
 	return 0;
 }
+EXPORT_SYMBOL_GPL(pci_disable_pcie_error_reporting);
 
 int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
 {
@@ -92,6 +94,7 @@ int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(pci_cleanup_aer_uncorrect_error_status);
 
 #if 0
 int pci_cleanup_aer_correct_error_status(struct pci_dev *dev)
@@ -110,7 +113,6 @@ int pci_cleanup_aer_correct_error_status(struct pci_dev *dev)
 }
 #endif  /*  0  */
 
-
 static int set_device_error_reporting(struct pci_dev *dev, void *data)
 {
 	bool enable = *((bool *)data);
@@ -164,8 +166,9 @@ static int add_error_device(struct aer_err_info *e_info, struct pci_dev *dev)
 		e_info->dev[e_info->error_dev_num] = dev;
 		e_info->error_dev_num++;
 		return 1;
-	} else
-		return 0;
+	}
+
+	return 0;
 }
 
 
@@ -193,7 +196,7 @@ static int find_device_iter(struct pci_dev *dev, void *data)
 		 * If there is no multiple error, we stop
 		 * or continue based on the id comparing.
 		 */
-		if (!(e_info->flags & AER_MULTI_ERROR_VALID_FLAG))
+		if (!e_info->multi_error_valid)
 			return result;
 
 		/*
@@ -233,24 +236,16 @@ static int find_device_iter(struct pci_dev *dev, void *data)
 	status = 0;
 	mask = 0;
 	if (e_info->severity == AER_CORRECTABLE) {
-		pci_read_config_dword(dev,
-				pos + PCI_ERR_COR_STATUS,
-				&status);
-		pci_read_config_dword(dev,
-				pos + PCI_ERR_COR_MASK,
-				&mask);
-		if (status & ERR_CORRECTABLE_ERROR_MASK & ~mask) {
+		pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &status);
+		pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK, &mask);
+		if (status & ~mask) {
 			add_error_device(e_info, dev);
 			goto added;
 		}
 	} else {
-		pci_read_config_dword(dev,
-				pos + PCI_ERR_UNCOR_STATUS,
-				&status);
-		pci_read_config_dword(dev,
-				pos + PCI_ERR_UNCOR_MASK,
-				&mask);
-		if (status & ERR_UNCORRECTABLE_ERROR_MASK & ~mask) {
+		pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
+		pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, &mask);
+		if (status & ~mask) {
 			add_error_device(e_info, dev);
 			goto added;
 		}
@@ -259,7 +254,7 @@ static int find_device_iter(struct pci_dev *dev, void *data)
 	return 0;
 
 added:
-	if (e_info->flags & AER_MULTI_ERROR_VALID_FLAG)
+	if (e_info->multi_error_valid)
 		return 0;
 	else
 		return 1;
@@ -411,8 +406,7 @@ static pci_ers_result_t broadcast_error_message(struct pci_dev *dev,
 			pci_cleanup_aer_uncorrect_error_status(dev);
 			dev->error_state = pci_channel_io_normal;
 		}
-	}
-	else {
+	} else {
 		/*
 		 * If the error is reported by an end point, we think this
 		 * error is related to the upstream link of the end point.
@@ -473,7 +467,7 @@ static pci_ers_result_t reset_link(struct pcie_device *aerdev,
 	if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE)
 		udev = dev;
 	else
-		udev= dev->bus->self;
+		udev = dev->bus->self;
 
 	data.is_downstream = 0;
 	data.aer_driver = NULL;
@@ -576,7 +570,7 @@ static pci_ers_result_t do_recovery(struct pcie_device *aerdev,
  *
  * Invoked when an error being detected by Root Port.
  */
-static void handle_error_source(struct pcie_device * aerdev,
+static void handle_error_source(struct pcie_device *aerdev,
 	struct pci_dev *dev,
 	struct aer_err_info *info)
 {
@@ -682,7 +676,7 @@ static void disable_root_aer(struct aer_rpc *rpc)
  *
  * Invoked by DPC handler to consume an error.
  */
-static struct aer_err_source* get_e_source(struct aer_rpc *rpc)
+static struct aer_err_source *get_e_source(struct aer_rpc *rpc)
 {
 	struct aer_err_source *e_source;
 	unsigned long flags;
@@ -702,32 +696,50 @@ static struct aer_err_source* get_e_source(struct aer_rpc *rpc)
 	return e_source;
 }
 
+/**
+ * get_device_error_info - read error status from dev and store it to info
+ * @dev: pointer to the device expected to have a error record
+ * @info: pointer to structure to store the error record
+ *
+ * Return 1 on success, 0 on error.
+ */
 static int get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
 {
-	int pos;
+	int pos, temp;
+
+	info->status = 0;
+	info->tlp_header_valid = 0;
 
 	pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
 
 	/* The device might not support AER */
 	if (!pos)
-		return AER_SUCCESS;
+		return 1;
 
 	if (info->severity == AER_CORRECTABLE) {
 		pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS,
 			&info->status);
-		if (!(info->status & ERR_CORRECTABLE_ERROR_MASK))
-			return AER_UNSUCCESS;
+		pci_read_config_dword(dev, pos + PCI_ERR_COR_MASK,
+			&info->mask);
+		if (!(info->status & ~info->mask))
+			return 0;
 	} else if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE ||
 		info->severity == AER_NONFATAL) {
 
 		/* Link is still healthy for IO reads */
 		pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
 			&info->status);
-		if (!(info->status & ERR_UNCORRECTABLE_ERROR_MASK))
-			return AER_UNSUCCESS;
+		pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_MASK,
+			&info->mask);
+		if (!(info->status & ~info->mask))
+			return 0;
+
+		/* Get First Error Pointer */
+		pci_read_config_dword(dev, pos + PCI_ERR_CAP, &temp);
+		info->first_error = PCI_ERR_CAP_FEP(temp);
 
 		if (info->status & AER_LOG_TLP_MASKS) {
-			info->flags |= AER_TLP_HEADER_VALID_FLAG;
+			info->tlp_header_valid = 1;
 			pci_read_config_dword(dev,
 				pos + PCI_ERR_HEADER_LOG, &info->tlp.dw0);
 			pci_read_config_dword(dev,
@@ -739,7 +751,7 @@ static int get_device_error_info(struct pci_dev *dev, struct aer_err_info *info)
 		}
 	}
 
-	return AER_SUCCESS;
+	return 1;
 }
 
 static inline void aer_process_err_devices(struct pcie_device *p_device,
@@ -753,14 +765,14 @@ static inline void aer_process_err_devices(struct pcie_device *p_device,
 				e_info->id);
 	}
 
+	/* Report all before handle them, not to lost records by reset etc. */
 	for (i = 0; i < e_info->error_dev_num && e_info->dev[i]; i++) {
-		if (get_device_error_info(e_info->dev[i], e_info) ==
-				AER_SUCCESS) {
+		if (get_device_error_info(e_info->dev[i], e_info))
 			aer_print_error(e_info->dev[i], e_info);
-			handle_error_source(p_device,
-					e_info->dev[i],
-					e_info);
-		}
+	}
+	for (i = 0; i < e_info->error_dev_num && e_info->dev[i]; i++) {
+		if (get_device_error_info(e_info->dev[i], e_info))
+			handle_error_source(p_device, e_info->dev[i], e_info);
 	}
 }
 
@@ -806,7 +818,9 @@ static void aer_isr_one_error(struct pcie_device *p_device,
 		if (e_src->status &
 			(PCI_ERR_ROOT_MULTI_COR_RCV |
 			 PCI_ERR_ROOT_MULTI_UNCOR_RCV))
-			e_info->flags |= AER_MULTI_ERROR_VALID_FLAG;
+			e_info->multi_error_valid = 1;
+
+		aer_print_port_info(p_device->port, e_info);
 
 		find_source_device(p_device->port, e_info);
 		aer_process_err_devices(p_device, e_info);
@@ -863,10 +877,5 @@ int aer_init(struct pcie_device *dev)
 	if (aer_osc_setup(dev) && !forceload)
 		return -ENXIO;
 
-	return AER_SUCCESS;
+	return 0;
 }
-
-EXPORT_SYMBOL_GPL(pci_enable_pcie_error_reporting);
-EXPORT_SYMBOL_GPL(pci_disable_pcie_error_reporting);
-EXPORT_SYMBOL_GPL(pci_cleanup_aer_uncorrect_error_status);
-

drivers/pci/pcie/aer/aerdrv_errprint.c

@@ -27,69 +27,70 @@
 #define AER_AGENT_COMPLETER		2
 #define AER_AGENT_TRANSMITTER		3
 
-#define AER_AGENT_REQUESTER_MASK	(PCI_ERR_UNC_COMP_TIME|	\
-					PCI_ERR_UNC_UNSUP)
-
-#define AER_AGENT_COMPLETER_MASK	PCI_ERR_UNC_COMP_ABORT
-
-#define AER_AGENT_TRANSMITTER_MASK(t, e) (e & (PCI_ERR_COR_REP_ROLL| \
-	((t == AER_CORRECTABLE) ? PCI_ERR_COR_REP_TIMER: 0)))
+#define AER_AGENT_REQUESTER_MASK(t)	((t == AER_CORRECTABLE) ?	\
+	0 : (PCI_ERR_UNC_COMP_TIME|PCI_ERR_UNC_UNSUP))
+#define AER_AGENT_COMPLETER_MASK(t)	((t == AER_CORRECTABLE) ?	\
+	0 : PCI_ERR_UNC_COMP_ABORT)
+#define AER_AGENT_TRANSMITTER_MASK(t)	((t == AER_CORRECTABLE) ?	\
+	(PCI_ERR_COR_REP_ROLL|PCI_ERR_COR_REP_TIMER) : 0)
 
 #define AER_GET_AGENT(t, e)						\
-	((e & AER_AGENT_COMPLETER_MASK) ? AER_AGENT_COMPLETER :		\
-	(e & AER_AGENT_REQUESTER_MASK) ? AER_AGENT_REQUESTER :		\
-	(AER_AGENT_TRANSMITTER_MASK(t, e)) ? AER_AGENT_TRANSMITTER :	\
+	((e & AER_AGENT_COMPLETER_MASK(t)) ? AER_AGENT_COMPLETER :	\
+	(e & AER_AGENT_REQUESTER_MASK(t)) ? AER_AGENT_REQUESTER :	\
+	(e & AER_AGENT_TRANSMITTER_MASK(t)) ? AER_AGENT_TRANSMITTER :	\
 	AER_AGENT_RECEIVER)
 
-#define AER_PHYSICAL_LAYER_ERROR_MASK	PCI_ERR_COR_RCVR
-#define AER_DATA_LINK_LAYER_ERROR_MASK(t, e)	\
-		(PCI_ERR_UNC_DLP|		\
-		PCI_ERR_COR_BAD_TLP| 		\
-		PCI_ERR_COR_BAD_DLLP|		\
-		PCI_ERR_COR_REP_ROLL| 		\
-		((t == AER_CORRECTABLE) ?	\
-		PCI_ERR_COR_REP_TIMER: 0))
-
 #define AER_PHYSICAL_LAYER_ERROR	0
 #define AER_DATA_LINK_LAYER_ERROR	1
 #define AER_TRANSACTION_LAYER_ERROR	2
 
-#define AER_GET_LAYER_ERROR(t, e)				\
-	((e & AER_PHYSICAL_LAYER_ERROR_MASK) ?			\
-	AER_PHYSICAL_LAYER_ERROR :				\
-	(e & AER_DATA_LINK_LAYER_ERROR_MASK(t, e)) ?		\
-		AER_DATA_LINK_LAYER_ERROR : 			\
-		AER_TRANSACTION_LAYER_ERROR)
+#define AER_PHYSICAL_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ?	\
+	PCI_ERR_COR_RCVR : 0)
+#define AER_DATA_LINK_LAYER_ERROR_MASK(t) ((t == AER_CORRECTABLE) ?	\
+	(PCI_ERR_COR_BAD_TLP|						\
+	PCI_ERR_COR_BAD_DLLP|						\
+	PCI_ERR_COR_REP_ROLL|						\
+	PCI_ERR_COR_REP_TIMER) : PCI_ERR_UNC_DLP)
+
+#define AER_GET_LAYER_ERROR(t, e)					\
+	((e & AER_PHYSICAL_LAYER_ERROR_MASK(t)) ? AER_PHYSICAL_LAYER_ERROR : \
+	(e & AER_DATA_LINK_LAYER_ERROR_MASK(t)) ? AER_DATA_LINK_LAYER_ERROR : \
+	AER_TRANSACTION_LAYER_ERROR)
+
+#define AER_PR(info, pdev, fmt, args...)				\
+	printk("%s%s %s: " fmt, (info->severity == AER_CORRECTABLE) ?	\
+		KERN_WARNING : KERN_ERR, dev_driver_string(&pdev->dev),	\
+		dev_name(&pdev->dev), ## args)
 
 /*
  * AER error strings
  */
-static char* aer_error_severity_string[] = {
+static char *aer_error_severity_string[] = {
 	"Uncorrected (Non-Fatal)",
 	"Uncorrected (Fatal)",
 	"Corrected"
 };
 
-static char* aer_error_layer[] = {
+static char *aer_error_layer[] = {
 	"Physical Layer",
 	"Data Link Layer",
 	"Transaction Layer"
 };
-static char* aer_correctable_error_string[] = {
-	"Receiver Error        ",	/* Bit Position 0 	*/
+static char *aer_correctable_error_string[] = {
+	"Receiver Error        ",	/* Bit Position 0	*/
 	NULL,
 	NULL,
 	NULL,
 	NULL,
 	NULL,
-	"Bad TLP               ",	/* Bit Position 6 	*/
-	"Bad DLLP              ",	/* Bit Position 7 	*/
-	"RELAY_NUM Rollover    ",	/* Bit Position 8 	*/
+	"Bad TLP               ",	/* Bit Position 6	*/
+	"Bad DLLP              ",	/* Bit Position 7	*/
+	"RELAY_NUM Rollover    ",	/* Bit Position 8	*/
 	NULL,
 	NULL,
 	NULL,
-	"Replay Timer Timeout  ",	/* Bit Position 12 	*/
-	"Advisory Non-Fatal    ", 	/* Bit Position 13	*/
+	"Replay Timer Timeout  ",	/* Bit Position 12	*/
+	"Advisory Non-Fatal    ",	/* Bit Position 13	*/
 	NULL,
 	NULL,
 	NULL,
@@ -110,7 +111,7 @@ static char* aer_correctable_error_string[] = {
 	NULL,
 };
 
-static char* aer_uncorrectable_error_string[] = {
+static char *aer_uncorrectable_error_string[] = {
 	NULL,
 	NULL,
 	NULL,
@@ -123,10 +124,10 @@ static char* aer_uncorrectable_error_string[] = {
 	NULL,
 	NULL,
 	NULL,
-	"Poisoned TLP          ",	/* Bit Position 12 	*/
+	"Poisoned TLP          ",	/* Bit Position 12	*/
 	"Flow Control Protocol ",	/* Bit Position 13	*/
-	"Completion Timeout    ",	/* Bit Position 14 	*/
-	"Completer Abort       ",	/* Bit Position 15 	*/
+	"Completion Timeout    ",	/* Bit Position 14	*/
+	"Completer Abort       ",	/* Bit Position 15	*/
 	"Unexpected Completion ",	/* Bit Position 16	*/
 	"Receiver Overflow     ",	/* Bit Position 17	*/
 	"Malformed TLP         ",	/* Bit Position 18	*/
@@ -145,98 +146,69 @@ static char* aer_uncorrectable_error_string[] = {
 	NULL,
 };
 
-static char* aer_agent_string[] = {
+static char *aer_agent_string[] = {
 	"Receiver ID",
 	"Requester ID",
 	"Completer ID",
 	"Transmitter ID"
 };
 
-static char * aer_get_error_source_name(int severity,
-			unsigned int status,
-			char errmsg_buff[])
+static void __aer_print_error(struct aer_err_info *info, struct pci_dev *dev)
 {
-	int i;
-	char * errmsg = NULL;
+	int i, status;
+	char *errmsg = NULL;
+
+	status = (info->status & ~info->mask);
 
 	for (i = 0; i < 32; i++) {
 		if (!(status & (1 << i)))
 			continue;
 
-		if (severity == AER_CORRECTABLE)
+		if (info->severity == AER_CORRECTABLE)
 			errmsg = aer_correctable_error_string[i];
 		else
 			errmsg = aer_uncorrectable_error_string[i];
 
-		if (!errmsg) {
-			sprintf(errmsg_buff, "Unknown Error Bit %2d  ", i);
-			errmsg = errmsg_buff;
-		}
-
-		break;
+		if (errmsg)
+			AER_PR(info, dev, "   [%2d] %s%s\n", i, errmsg,
+				info->first_error == i ? " (First)" : "");
+		else
+			AER_PR(info, dev, "   [%2d] Unknown Error Bit%s\n", i,
+				info->first_error == i ? " (First)" : "");
 	}
-
-	return errmsg;
 }
 
-static DEFINE_SPINLOCK(logbuf_lock);
-static char errmsg_buff[100];
 void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
 {
-	char * errmsg;
-	int err_layer, agent;
-	char * loglevel;
-
-	if (info->severity == AER_CORRECTABLE)
-		loglevel = KERN_WARNING;
-	else
-		loglevel = KERN_ERR;
-
-	printk("%s+------ PCI-Express Device Error ------+\n", loglevel);
-	printk("%sError Severity\t\t: %s\n", loglevel,
-		aer_error_severity_string[info->severity]);
-
-	if ( info->status == 0) {
-		printk("%sPCIE Bus Error type\t: (Unaccessible)\n", loglevel);
-		printk("%sUnaccessible Received\t: %s\n", loglevel,
-			info->flags & AER_MULTI_ERROR_VALID_FLAG ?
-				"Multiple" : "First");
-		printk("%sUnregistered Agent ID\t: %04x\n", loglevel,
-			(dev->bus->number << 8) | dev->devfn);
+	int id = ((dev->bus->number << 8) | dev->devfn);
+
+	if (info->status == 0) {
+		AER_PR(info, dev,
+			"PCIE Bus Error: severity=%s, type=Unaccessible, "
+			"id=%04x(Unregistered Agent ID)\n",
+			aer_error_severity_string[info->severity], id);
 	} else {
-		err_layer = AER_GET_LAYER_ERROR(info->severity, info->status);
-		printk("%sPCIE Bus Error type\t: %s\n", loglevel,
-			aer_error_layer[err_layer]);
-
-		spin_lock(&logbuf_lock);
-		errmsg = aer_get_error_source_name(info->severity,
-				info->status,
-				errmsg_buff);
-		printk("%s%s\t: %s\n", loglevel, errmsg,
-			info->flags & AER_MULTI_ERROR_VALID_FLAG ?
-				"Multiple" : "First");
-		spin_unlock(&logbuf_lock);
+		int layer, agent;
 
+		layer = AER_GET_LAYER_ERROR(info->severity, info->status);
 		agent = AER_GET_AGENT(info->severity, info->status);
-		printk("%s%s\t\t: %04x\n", loglevel,
-			aer_agent_string[agent],
-			(dev->bus->number << 8) | dev->devfn);
-
-		printk("%sVendorID=%04xh, DeviceID=%04xh,"
-			" Bus=%02xh, Device=%02xh, Function=%02xh\n",
-			loglevel,
-			dev->vendor,
-			dev->device,
-			dev->bus->number,
-			PCI_SLOT(dev->devfn),
-			PCI_FUNC(dev->devfn));
-
-		if (info->flags & AER_TLP_HEADER_VALID_FLAG) {
+
+		AER_PR(info, dev,
+			"PCIE Bus Error: severity=%s, type=%s, id=%04x(%s)\n",
+			aer_error_severity_string[info->severity],
+			aer_error_layer[layer], id, aer_agent_string[agent]);
+
+		AER_PR(info, dev,
+			"  device [%04x:%04x] error status/mask=%08x/%08x\n",
+			dev->vendor, dev->device, info->status, info->mask);
+
+		__aer_print_error(info, dev);
+
+		if (info->tlp_header_valid) {
 			unsigned char *tlp = (unsigned char *) &info->tlp;
-			printk("%sTLP Header:\n", loglevel);
-			printk("%s%02x%02x%02x%02x %02x%02x%02x%02x"
+			AER_PR(info, dev, "  TLP Header:"
+				" %02x%02x%02x%02x %02x%02x%02x%02x"
 				" %02x%02x%02x%02x %02x%02x%02x%02x\n",
-				loglevel,
 				*(tlp + 3), *(tlp + 2), *(tlp + 1), *tlp,
 				*(tlp + 7), *(tlp + 6), *(tlp + 5), *(tlp + 4),
 				*(tlp + 11), *(tlp + 10), *(tlp + 9),
@@ -244,5 +216,15 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
 				*(tlp + 13), *(tlp + 12));
 		}
 	}
+
+	if (info->id && info->error_dev_num > 1 && info->id == id)
+		AER_PR(info, dev,
+			"  Error of this Agent(%04x) is reported first\n", id);
 }
 
+void aer_print_port_info(struct pci_dev *dev, struct aer_err_info *info)
+{
+	dev_info(&dev->dev, "AER: %s%s error received: id=%04x\n",
+		info->multi_error_valid ? "Multiple " : "",
+		aer_error_severity_string[info->severity], info->id);
+}

drivers/pci/pcie/portdrv_core.c

@@ -187,14 +187,9 @@ static int pcie_port_enable_msix(struct pci_dev *dev, int *vectors, int mask)
  */
 static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask)
 {
-	struct pcie_port_data *port_data = pci_get_drvdata(dev);
 	int irq, interrupt_mode = PCIE_PORT_NO_IRQ;
 	int i;
 
-	/* Check MSI quirk */
-	if (port_data->port_type == PCIE_RC_PORT && pcie_mch_quirk)
-		goto Fallback;
-
 	/* Try to use MSI-X if supported */
 	if (!pcie_port_enable_msix(dev, vectors, mask))
 		return PCIE_PORT_MSIX_MODE;
@@ -203,7 +198,6 @@ static int assign_interrupt_mode(struct pci_dev *dev, int *vectors, int mask)
 	if (!pci_enable_msi(dev))
 		interrupt_mode = PCIE_PORT_MSI_MODE;
 
- Fallback:
 	if (interrupt_mode == PCIE_PORT_NO_IRQ && dev->pin)
 		interrupt_mode = PCIE_PORT_INTx_MODE;
 

drivers/pci/pcie/portdrv_pci.c

@@ -205,6 +205,7 @@ static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev)
 
 	/* If fatal, restore cfg space for possible link reset at upstream */
 	if (dev->error_state == pci_channel_io_frozen) {
+		dev->state_saved = true;
 		pci_restore_state(dev);
 		pcie_portdrv_restore_config(dev);
 		pci_enable_pcie_error_reporting(dev);

drivers/pci/setup-res.c

@@ -119,6 +119,7 @@ int pci_claim_resource(struct pci_dev *dev, int resource)
 
 	return err;
 }
+EXPORT_SYMBOL(pci_claim_resource);
 
 #ifdef CONFIG_PCI_QUIRKS
 void pci_disable_bridge_window(struct pci_dev *dev)

drivers/video/Kconfig

@@ -7,6 +7,8 @@ menu "Graphics support"
 
 source "drivers/char/agp/Kconfig"
 
+source "drivers/gpu/vga/Kconfig"
+
 source "drivers/gpu/drm/Kconfig"
 
 config VGASTATE

include/asm-generic/pci.h

@@ -30,7 +30,18 @@ pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
 	res->end = region->end;
 }
 
-#define pcibios_scan_all_fns(a, b)	0
+static inline struct resource *
+pcibios_select_root(struct pci_dev *pdev, struct resource *res)
+{
+	struct resource *root = NULL;
+
+	if (res->flags & IORESOURCE_IO)
+		root = &ioport_resource;
+	if (res->flags & IORESOURCE_MEM)
+		root = &iomem_resource;
+
+	return root;
+}
 
 #ifndef HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)