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wl12xx: Make sure HW is available in sched scan ops 

The sched_scan_(stop|start) ops fails to check for WL1271_STATE_OFF.
This can lead to a race where the driver tries to access the HW
while it's off.

Fix this by checking for WL1271_STATE_OFF before accessing the HW.

Signed-off-by: Pontus Fuchs <pontus.fuchs@gmail.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
This commit is contained in:
Pontus Fuchs 2012-01-11 14:22:42 +01:00 committed by Luciano Coelho
parent 15944aef29
commit 9e0dc890ce
1 changed files with 8 additions and 0 deletions
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8
drivers/net/wireless/wl12xx/main.c
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@ -3108,6 +3108,11 @@ static int wl1271_op_sched_scan_start(struct ieee80211_hw *hw,
mutex_lock(&wl->mutex);
if (wl->state == WL1271_STATE_OFF) {
ret = -EAGAIN;
goto out;
}
ret = wl1271_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
@ -3139,6 +3144,9 @@ static void wl1271_op_sched_scan_stop(struct ieee80211_hw *hw,
mutex_lock(&wl->mutex);
if (wl->state == WL1271_STATE_OFF)
goto out;
ret = wl1271_ps_elp_wakeup(wl);
if (ret < 0)
goto out;