[PATCH] shpchp - cleanup slot list

This patch changes SHPCHP driver to use list_head structure for
managing slot list.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/pci/hotplug/shpchp.h

@@ -56,7 +56,6 @@ extern int shpchp_debug;
 #define SLOT_MAGIC	0x67267321
 struct slot {
 	u32 magic;
-	struct slot *next;
 	u8 bus;
 	u8 device;
 	u16 status;
@@ -87,7 +86,7 @@ struct controller {
 	struct pci_dev *pci_dev;
 	struct pci_bus *pci_bus;
 	struct event_info event_queue[10];
-	struct slot *slot;
+	struct list_head slot_list;
 	struct hpc_ops *hpc_ops;
 	wait_queue_head_t queue;	/* sleep & wake process */
 	u8 next_event;
@@ -315,23 +314,19 @@ static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const ch
 
 static inline struct slot *shpchp_find_slot (struct controller *ctrl, u8 device)
 {
-	struct slot *p_slot, *tmp_slot = NULL;
+	struct slot *slot;
 
 	if (!ctrl)
 		return NULL;
 
-	p_slot = ctrl->slot;
-
-	while (p_slot && (p_slot->device != device)) {
-		tmp_slot = p_slot;
-		p_slot = p_slot->next;
-	}
-	if (p_slot == NULL) {
-		err("ERROR: shpchp_find_slot device=0x%x\n", device);
-		p_slot = tmp_slot;
+	list_for_each_entry(slot, &ctrl->slot_list, slot_list) {
+		if (slot->device == device)
+			return slot;
 	}
 
-	return (p_slot);
+	err("%s: slot (device=0x%x) not found\n", __FUNCTION__, device);
+
+	return NULL;
 }
 
 static inline int wait_for_ctrl_irq (struct controller *ctrl)

drivers/pci/hotplug/shpchp_core.c

@@ -173,8 +173,7 @@ static int init_slots(struct controller *ctrl)
 			goto error_name;
 		}
 
-		slot->next = ctrl->slot;
-		ctrl->slot = slot;
+		list_add(&slot->slot_list, &ctrl->slot_list);
 	}
 
 	return 0;
@@ -192,15 +191,14 @@ error:
 
 static void cleanup_slots(struct controller *ctrl)
 {
-	struct slot *old_slot, *next_slot;
-
-	old_slot = ctrl->slot;
-	ctrl->slot = NULL;
+	struct list_head *tmp;
+	struct list_head *next;
+	struct slot *slot;
 
-	while (old_slot) {
-		next_slot = old_slot->next;
-		pci_hp_deregister(old_slot->hotplug_slot);
-		old_slot = next_slot;
+	list_for_each_safe(tmp, next, &ctrl->slot_list) {
+		slot = list_entry(tmp, struct slot, slot_list);
+		list_del(&slot->slot_list);
+		pci_hp_deregister(slot->hotplug_slot);
 	}
 }
 
@@ -391,6 +389,7 @@ static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_out_none;
 	}
 	memset(ctrl, 0, sizeof(struct controller));
+	INIT_LIST_HEAD(&ctrl->slot_list);
 
 	rc = shpc_init(ctrl, pdev);
 	if (rc) {