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authorZhang Yanmin <yanmin.zhang@intel.com>2006-06-02 12:35:43 +0800
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-21 12:00:01 -0700
commitd71374dafbba7ec3f67371d3b7e9f6310a588808 (patch)
tree116dcd65fde3701d10fea954cdbd5bb063182b2c /drivers/pci/pci.h
parent733a7fe12248072e1bca729c88a26298666f1956 (diff)
[PATCH] PCI: fix race with pci_walk_bus and pci_destroy_dev
pci_walk_bus has a race with pci_destroy_dev. When cb is called in pci_walk_bus, pci_destroy_dev might unlink the dev pointed by next. Later on in the next loop, pointer next becomes NULL and cause kernel panic. Below patch against 2.6.17-rc4 fixes it by changing pci_bus_lock (spin_lock) to pci_bus_sem (rw_semaphore). Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci/pci.h')
-rw-r--r--drivers/pci/pci.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 30630cbe2fe..29bdeca031a 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -40,7 +40,7 @@ extern int pci_bus_find_capability (struct pci_bus *bus, unsigned int devfn, int
extern void pci_remove_legacy_files(struct pci_bus *bus);
/* Lock for read/write access to pci device and bus lists */
-extern spinlock_t pci_bus_lock;
+extern struct rw_semaphore pci_bus_sem;
#ifdef CONFIG_X86_IO_APIC
extern int pci_msi_quirk;