ath9k: fix race with IEEE80211_CONF_PS checks
authorGabor Juhos <juhosg@openwrt.org>
Fri, 24 Jul 2009 15:27:21 +0000 (17:27 +0200)
committerJohn W. Linville <linville@tuxdriver.com>
Wed, 29 Jul 2009 19:46:03 +0000 (15:46 -0400)
commit96148326c4b54db5c384def1a5ab285c359d1395
tree86985eb7ab56819992066500ad215bfea63121a0
parentff8365ca889cb86ba5bd40fe3047d047bc632f4c
ath9k: fix race with IEEE80211_CONF_PS checks

There is a small window where the mac80211 changes the IEEE80211_CONF_PS
flag, and then informs the driver about the change. We have a race
condition if we are checking the flag in the same time. Avoid it by
introducing a local variable, and using that instead of checking the
IEEE80211_CONF_PS flag directly.

This fix the problem reported by Luis:
http://article.gmane.org/gmane.linux.kernel.wireless.general/34363

Changes-licensed-under: ISC
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/ath/ath9k/ath9k.h
drivers/net/wireless/ath/ath9k/hw.c
drivers/net/wireless/ath/ath9k/hw.h
drivers/net/wireless/ath/ath9k/main.c