tree 116dcd65fde3701d10fea954cdbd5bb063182b2c
parent 733a7fe12248072e1bca729c88a26298666f1956
author Zhang Yanmin <yanmin.zhang@intel.com> 1149222943 +0800
committer Greg Kroah-Hartman <gregkh@suse.de> 1150916401 -0700

[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>