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Message-ID: <47E33937.5050205@jp.fujitsu.com>
Date: Fri, 21 Mar 2008 13:27:35 +0900
From: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
To: Alex Chiang <achiang@...com>, Greg KH <gregkh@...e.de>
CC: Gary Hade <garyhade@...ibm.com>,
Kristen Carlson Accardi <kristen.c.accardi@...el.com>,
Matthew Wilcox <matthew@....cx>, warthog19@...lescrag.net,
rick.jones2@...com, linux-kernel@...r.kernel.org,
linux-pci@...ey.karlin.mff.cuni.cz, linux-acpi@...r.kernel.org
Subject: [PATCH 16/16][BUG] PCI hotplug core: add missing lock for hotplug
slot list (Not for mainline!)
Add missing lock for manipulating pci_hotplug_slot_list.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
---
drivers/pci/hotplug/pci_hotplug_core.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
Index: linux-2.6.25-rc6/drivers/pci/hotplug/pci_hotplug_core.c
===================================================================
--- linux-2.6.25-rc6.orig/drivers/pci/hotplug/pci_hotplug_core.c
+++ linux-2.6.25-rc6/drivers/pci/hotplug/pci_hotplug_core.c
@@ -61,6 +61,7 @@ static int debug;
//////////////////////////////////////////////////////////////////
static LIST_HEAD(pci_hotplug_slot_list);
+static DEFINE_SPINLOCK(pci_hotplug_slot_list_lock);
/* these strings match up with the values in pci_bus_speed */
static char *pci_bus_speed_strings[] = {
@@ -529,12 +530,16 @@ static struct hotplug_slot *get_slot_fro
struct hotplug_slot *slot;
struct list_head *tmp;
+ spin_lock(&pci_hotplug_slot_list_lock);
list_for_each (tmp, &pci_hotplug_slot_list) {
slot = list_entry (tmp, struct hotplug_slot, slot_list);
if (strcmp(slot->name, name) == 0)
- return slot;
+ goto out;
}
- return NULL;
+ slot = NULL;
+out:
+ spin_unlock(&pci_hotplug_slot_list_lock);
+ return slot;
}
/**
@@ -584,7 +589,9 @@ int pci_hp_register(struct hotplug_slot
}
}
+ spin_lock(&pci_hotplug_slot_list_lock);
list_add(&slot->slot_list, &pci_hotplug_slot_list);
+ spin_unlock(&pci_hotplug_slot_list_lock);
result = fs_add_slot(pci_slot);
kobject_uevent(&pci_slot->kobj, KOBJ_ADD);
@@ -613,7 +620,9 @@ int pci_hp_deregister(struct hotplug_slo
if (temp != hotplug)
return -ENODEV;
+ spin_lock(&pci_hotplug_slot_list_lock);
list_del(&hotplug->slot_list);
+ spin_unlock(&pci_hotplug_slot_list_lock);
slot = hotplug->pci_slot;
fs_remove_slot(slot);
--
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