From: Ido Yariv Date: Wed, 11 Jan 2012 07:42:40 +0000 (+0200) Subject: wl12xx: Power off after flushing work X-Git-Tag: firefly_0821_release~3680^2~3338^2~108^2~351^2~43 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a454969ede024a209e6a755d5f7a928ab81ed00c;p=firefly-linux-kernel-4.4.55.git wl12xx: Power off after flushing work When stopping plt, the chip is powered off before all current work items are flushed and interrupts are disabled. This might introduce a race in which the driver tries to communicate with a powered off chip. Fix this by powering off the device only after interrupts are disabled and all work items are flushed. Signed-off-by: Ido Yariv Signed-off-by: Luciano Coelho --- diff --git a/drivers/net/wireless/wl12xx/main.c b/drivers/net/wireless/wl12xx/main.c index ac6866469073..9e9fb3fb8f01 100644 --- a/drivers/net/wireless/wl12xx/main.c +++ b/drivers/net/wireless/wl12xx/main.c @@ -1406,8 +1406,6 @@ int wl1271_plt_stop(struct wl1271 *wl) goto out; } - wl1271_power_off(wl); - wl->state = WL1271_STATE_OFF; wl->rx_counter = 0; @@ -1417,6 +1415,11 @@ int wl1271_plt_stop(struct wl1271 *wl) wl1271_flush_deferred_work(wl); cancel_work_sync(&wl->netstack_work); cancel_work_sync(&wl->recovery_work); + + mutex_lock(&wl->mutex); + wl1271_power_off(wl); + mutex_unlock(&wl->mutex); + out: return ret; }