diff options
| author | Igor Perminov <igor.perminov@inbox.ru> | 2009-08-08 23:55:18 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-08-14 09:13:53 -0400 |
| commit | 17512dc3b7fc9ff1a60d3748ce87c323df507c3d (patch) | |
| tree | 1ad4c98c3c653571552156116ce639c6e0aa2789 /drivers/net/wireless/rt2x00/rt73usb.c | |
| parent | 66679a65efffffb62dc2650960b3aff758d575f9 (diff) | |
| download | blackbird-op-linux-17512dc3b7fc9ff1a60d3748ce87c323df507c3d.tar.gz blackbird-op-linux-17512dc3b7fc9ff1a60d3748ce87c323df507c3d.zip | |
rt2x00: Fix for race condition while update beacon
The patch "Implement set_tim callback for all drivers" can cause kernel
oops in rt73usb_write_beacon. The oops is caused by one of the following
race conditions:
* In case of two near calls to set_tim: rt2x00lib_beacondone_iter is
cleaning the beacon skb, whereas rt73usb_write_beacon is still using it.
* In case of two near updates of beacon: first as the result of set_tim
and second as the result of a call from an application (e.g. hostapd).
This patch fixes the race condition by rearranging the update logic and
guarding rt2x00_intf->beacon->skb with a mutex.
Signed-off-by: Igor Perminov <igor.perminov@inbox.ru>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt73usb.c')
0 files changed, 0 insertions, 0 deletions
