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b43: work around a locking issue in ->set_tim()

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ops->set_tim() must be atomic, so b43 trying to acquire a mutex leads
to a kernel crash. This patch trades an easy to trigger crash in AP
mode for an unlikely race condition. According to Michael, the real
fix would be to allow set_tim() to sleep, since b43 is not the only
driver that needs to sleep in all callbacks.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2009-11-07 18:37:37 +01:00 committed by John W. Linville
parent d8e2352278
commit 8f611288c8
1 changed files with 1 additions and 2 deletions
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3
drivers/net/wireless/b43/main.c
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@ -4521,9 +4521,8 @@ static int b43_op_beacon_set_tim(struct ieee80211_hw *hw,
{
struct b43_wl *wl = hw_to_b43_wl(hw);
mutex_lock(&wl->mutex);
/* FIXME: add locking */
b43_update_templates(wl);
mutex_unlock(&wl->mutex);
return 0;
}