- 27 Sep, 2006 40 commits
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Alan Stern authored
The usbfs code doesn't provide sufficient mutual exclusion among open, release, and remove. Release vs. remove is okay because they both acquire the device lock, but open is not exclusive with either one. All three routines modify the udev->filelist linked list, so they must not run concurrently. Apparently someone gave this a minimum amount of thought in the past by explicitly acquiring the BKL at the start of the usbdev_open routine. Oddly enough, there's a comment pointing out that locking is unnecessary because chrdev_open already has acquired the BKL. But this ignores the point that the files in /proc/bus/usb/* are not char device files; they are regular files and so they don't get any special locking. Furthermore it's necessary to acquire the same lock in the release and remove routines, which the code does not do. Yet another problem arises because the same file_operations structure is accessible through both the /proc/bus/usb/* and /dev/usb/usbdev* file nodes. Even when one of them has been removed, it's still possible for userspace to open the other. So simple locking around the individual remove routines is insufficient; we need to lock the entire usb_notify_remove_device notifier chain. Rather than rely on the BKL, this patch (as723) introduces a new private mutex for the purpose. Holding the BKL while invoking a notifier chain doesn't seem like a good idea. Signed-off-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de>
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Sean Young authored
device_create_file() could fail, add proper error paths for this condition. Signed-off-by:
Sean Young <sean@mess.org> Signed-off-by:
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Sean Young authored
This patch creates a device class phidget and add the phidget drivers to them. Signed-off-by:
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Sean Young authored
This driver add support for the Phidgets Inc., MotorControl via sysfs. Also some minor fixes for the InterfaceKit. Signed-off-by:
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Alan Stern authored
This patch (as737b) does a very small cleanup of core/sysfs.c by adding the configuration_string attribute file to the existing attribute group instead of treating it separately. It doesn't need this separate treatment because unlike the other device string attributes, it changes along with the active configuration. The patch also fixes a simple typo (which, oddly enough, doesn't seem to bother the compiler). Signed-off-by:
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Dmitry Torokhov authored
kfree() handles NULL arguments which is handy in error handling paths as one does need to insert bunch of ifs. How about making usb_buffer_free() do the same? Signed-off-by:
Dmitry Torokhov <dtor@mail.ru> Signed-off-by:
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Werner Lemberg authored
Formatting only. Signed-off-by:
Werner Lemberg <wl@gnu.org> Signed-off-by:
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Werner Lemberg authored
Add (dummy?) support for TIOCGSERIAL and TIOCSSERIAL ioctl calls to the USB serial driver file `ark3116.c'. This is sufficient for me to run wvdial successfully, receive my email, and do webbrowsing with firefox. On the other hand, running the cvs program to update archives seems not to work, and the traceroute command sometimes says send failed: No buffer space available Looks like a buffering problem... My knowledge of serial device drivers is zero, so I can't fix this -- I just did a cut'n'paste from other USB serial drivers... Signed-off-by:
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Tony Lindgren authored
Allows compiling g_ether in and fixes a typo with MUSB_HDRC Signed-off-by:
Tony Lindgren <tony@atomide.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by:
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David Brownell authored
This updates the PXA 25x UDC board-independent infrastructure for VBUS sensing and the D+ pullup. The original code evolved from rather bizarre support on Intel's "Lubbock" reference hardware, so that on more sensible hardware it doesn't work as well as it could/should. The change is just to teach the UDC driver how to use built-in PXA GPIO pins directly. This reduces the amount of board-specfic object code needed, and enables the use of a VBUS sensing IRQ on boards (like Gumstix) that have one. With VBUS sensing, the UDC is unclocked until a host is actually connected. Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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David Brownell authored
Move <linux/usb_otg.h> to <linux/usb/otg.h>. Signed-off-by:
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Andrew Morton authored
drivers/usb/host/Kconfig:87:warning: 'select' used by config symbol 'USB_OHCI_HCD' refer to undefined symbol 'I2C_PNX' Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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Vitaly Wool authored
inlined is the patch that adds basic support for USB OHCI controller support for PNX4008 Philips PNX4008 ARM board. Due to HW design, it depends on I2C driver for PNX4008 which I've recetnly posted to LKML and i2c at lm-sensors. Signed-off-by:
Vitaly Wool <vitalywool@gmail.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by:
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Ben Dooks authored
With the newer Samsung S3C2412 and S3C2413 SoC devices, the 48MHz USB clock has been given an individual gate into the USB OHCI and gadget blocks. This clock is called usb-bus-clock, and we need to replace the old use of the USB PLL (upll) directly with the new usb-bus-host. The S3C2410 clock driver has been updated already to provide a virtual clock which is a child of the UPLL to maintain compatibility. The S3C2412 clock driver correctly enables the PLL when either usb-bus clock is active. Signed-off-by:
Ben Dooks <ben-linux@fluff.org> Signed-off-by:
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David Brownell authored
This teaches OHCI to use the root hub status change (RHSC) IRQ, bypassing root hub timers most of the time and switching over to the "new" root hub polling scheme. It's complicated by the fact that implementations of OHCI trigger and ack that IRQ differently (the spec is vague there). Avoiding root hub timers helps mechanisms like "dynamic tick" leave the CPU in lowpower modes for longer intervals. Signed-off-by:
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Sam Bishop authored
A little more detail on how and when to poll() /proc/bus/usb/devices. Signed-off-by:
Sam Bishop <sam@bishop.dhs.org> Signed-off-by:
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Sam Bishop authored
Grammar, spelling, and stylistic edits. Signed-off-by:
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Phil Dibowitz authored
This patch is a re-diffed version of one originally sent by Jan Mate <mate@fiit.stuba.sk>. Signed-off-by:
Phil Dibowitz <phil@ipom.com> Signed-off-by:
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Alan Stern authored
This patch (as781) adds an entry to unusual_devs.h for the Lacie DVD+-RW drive. Apparently its USB interface has requirements similar to the Genesys Logic interface; it doesn't like data to be sent too soon after a command. This fixes Bugzilla #6817. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6Linus Torvalds authored
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] minor reformatting to vmlinux.lds.S [IA64] CMC/CPE: Reverse the order of fetching log and checking poll threshold [IA64] PAL calls need physical mode, stacked [IA64] ar.fpsr not set on MCA/INIT kernel entry [IA64] printing support for MCA/INIT [IA64] trim output of show_mem() [IA64] show_mem() printk levels [IA64] Make gp value point to Region 5 in mca handler Revert "[IA64] Unwire set/get_robust_list" [IA64] Implement futex primitives [IA64-SGI] Do not request DMA memory for BTE [IA64] Move perfmon tables from thread_struct to pfm_context [IA64] Add interface so modules can discover whether multithreading is on. [IA64] kprobes: fixup the pagefault exception caused by probehandlers [IA64] kprobe opcode 16 bytes alignment on IA64 [IA64] esi-support [IA64] Add "model name" to /proc/cpuinfo
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6: (108 commits) sh: Fix occasional flush_cache_4096() stack corruption. sh: Calculate shm alignment at runtime. sh: dma-mapping compile fixes. sh: Initial vsyscall page support. sh: Clean up PAGE_SIZE definition for assembly use. sh: Selective flush_cache_mm() flushing. sh: More intelligent entry_mask/way_size calculation. sh: Support for L2 cache on newer SH-4A CPUs. sh: Update kexec support for API changes. sh: Optimized readsl()/writesl() support. sh: Report movli.l/movco.l capabilities. sh: CPU flags in AT_HWCAP in ELF auxvt. sh: Add support for 4K stacks. sh: Enable /proc/kcore support. sh: stack debugging support. sh: select CONFIG_EMBEDDED. sh: machvec rework. sh: Solution Engine SH7343 board support. sh: SH7710VoIPGW board support. sh: Enable verbose BUG() support. ...
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Linus Torvalds authored
* master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Kill bogus check from bootmem_init(). [SPARC64]: Update defconfig.
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Andrew Morton authored
Avoid possible deadlock on a BUG() inside down_write(mmap_sem). The deadlock can only occur if something has gone horridly wrong, because a fault here shouldn't happen. Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Andrew Morton authored
Add a version of __get_user() which is safe to call inside mmap_sem. Signed-off-by:
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Eric W. Biederman authored
Ingo Oeser pointed out that because current expands to an inline function it is more space efficient and somewhat faster to simply keep a cached copy of current in another variable. This patch implements that for the de_thread function. (akpm: saves nearly 100 bytes of text on x86) Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Signed-off-by:
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Adrian Bunk authored
Signed-off-by:
Adrian Bunk <bunk@stusta.de> Acked-by:
Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by:
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Martin Bligh authored
Add missing \n to dprintk Signed-off-by:
Martin Bligh <mbligh@google.com> Acked-by:
Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by:
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Eric W. Biederman authored
With the patches flying between Oleg and myself somehow this temporary debug code got left in pid.c. It was never intended to make it to the stable kernel. Signed-off-by:
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Eric W. Biederman authored
In de_thread we move pids from one process to another, a rather ugly case. The function transfer_pid makes it clear what we are doing, and makes the action atomic. This is useful we ever want to atomically traverse the process group and session lists, in a rcu safe manner. Even if the atomic properties this change should be a win as transfer_pid should be less code to execute than executing both attach_pid and detach_pid, and this should make de_thread slightly smaller as only a single function call needs to be emitted. The only downside is that the code might be slower to execute as the odds are against transfer_pid being in cache. Signed-off-by:
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Eric W. Biederman authored
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Eric W. Biederman authored
Since sys_sysctl is deprecated start allow it to be compiled out. This should catch any remaining user space code that cares, and paves the way for further sysctl cleanups. [akpm@osdl.org: If sys_sysctl() is not compiled-in, emit a warning] Signed-off-by:
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Pekka J Enberg authored
Simpler, cleaner. Signed-off-by:
Pekka Enberg <penberg@cs.helsinki.fi> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Marcelo Tosatti authored
The param section is an array of "kernel_param" structures, storing only constant data: pointer to name, permission of the variable pointed to by (void *)arg and pointers to set/get methods. Move end_rodata down to include __param section in the read-only range used by CONFIG_DEBUG_RODATA. Signed-off-by:
Marcelo Tosatti <marcelo@kvack.org> Acked-by:
Arjan van de Ven <arjan@infradead.org> Signed-off-by:
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Andrew Morton authored
free_fdset(NULL, ...) is legal. Signed-off-by:
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Michael Tokarev authored
Add modalias attribute support for the almost forgotten now EISA bus and (at least some) EISA-aware modules. The modalias entry looks like (for an 3c509 NIC): eisa:sTCM5093 and the in-module alias like: eisa:sTCM5093* The patch moves struct eisa_device_id declaration from include/linux/eisa.h to include/linux/mod_devicetable.h (so that the former now #includes the latter), adds proper MODULE_DEVICE_TABLE(eisa, ...) statements for all drivers with EISA IDs I found (some drivers already have that DEVICE_TABLE declared), and adds recognision of __mod_eisa_device_table to scripts/mod/file2alias.c so that proper modules.alias will be generated. There's no support for /lib/modules/$kver/modules.eisamap, as it's not used by any existing tools, and because with in-kernel modalias mechanism those maps are obsolete anyway. The rationale for this patch is: a) to make EISA bus to act as other busses with modalias support, to unify driver loading b) to foget about EISA finally - with this patch, kernel (who still supports EISA) will be the only one who knows how to choose the necessary drivers for this bus ;) [akpm@osdl.org: fix the kbuild bit] Signed-off-by:Michael Tokarev <mjt@tls.msk.ru> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Randy Dunlap <rdunlap@xenotime.net> Acked-the-net-bits-by:
Jeff Garzik <jeff@garzik.org> Acked-the-tulip-bit-by:
Valerie Henson <val_henson@linux.intel.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by:
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Randy Dunlap authored
Consistently use MAX_ERRNO when checking for errors in __syscall_return(). [ralf@linux-mips.org: build fix] Signed-off-by:
Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
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Shaohua Li authored
IA32 manual says if micorcode update's size is 0, then the size is default size (2048 bytes). But this doesn't suggest all microcode update's size should be above 2048 bytes to me. We actually had a microcode update whose size is 1024 bytes. The patch just removed the check. Signed-off-by:
Shaohua Li <shaohua.li@intel.com> Cc: Tigran Aivazian <tigran@veritas.com> Signed-off-by:
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Shaohua Li authored
Add sysfs support. Currently each CPU has three microcode related attributes. One is 'version' which shows current ucode version of CPU. Tools can use the attribute do validation or show CPU ucode status. one is 'reload' which allows manually reloading ucode. Another is 'processor_flags', which exports processor flags, so we can write tools to check if CPU has latest ucode. Also add suspend/resume and CPU hotplug support. [akpm@osdl.org: cleanups, build fix] [bunk@stusta.de: Kconfig fixes] Signed-off-by:
Tigran Aivazian <tigran@veritas.com> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Shaohua Li authored
Using request_firmware to pull ucode from userspace, so we don't need the application 'microcode_ctl' to assist. We name each ucode file according to CPU's info as intel-ucode/family-model-stepping. In this way we could split ucode file as small one. This has a lot of advantages such as selectively update and validate microcode for specific models, better manage microcode file, easily write tools for administerators and so on. with the changes, we should put all intel-ucode/xx-xx-xx microcode files into the firmware dir (I had a tool to split previous big data file into small one and later we will release new style data file). The init script should be changed to just loading the driver without unloading Signed-off-by:
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Shaohua Li authored
Clean up microcode update driver and make it more readable. [akpm@osdl.org: cleanups] Signed-off-by:
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