wl12xx: check if elp wakeup failed

Check the return call from wl12xx_ps_elp_wakeup() and bail out if it
fails. This shouldn't happen, but if does there's a fundamental low
level issue.

Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com>
Reviewed-by: Vidhya Govindan <vidhya.govindan@nokia.com>
Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1251.c b/drivers/net/wireless/wl12xx/wl1251.c
index 903624a540a3..5f6e75c61128 100644
--- a/drivers/net/wireless/wl12xx/wl1251.c
+++ b/drivers/net/wireless/wl12xx/wl1251.c
@@ -401,6 +401,7 @@ static void wl1251_irq_work(struct work_struct *work)
         u32 intr;
         struct wl12xx *wl =
                 container_of(work, struct wl12xx, irq_work);
+        int ret;
 
         mutex_lock(&wl->mutex);
 
@@ -409,7 +410,9 @@ static void wl1251_irq_work(struct work_struct *work)
         if (wl->state == WL12XX_STATE_OFF)
                 goto out;
 
-        wl12xx_ps_elp_wakeup(wl);
+        ret = wl12xx_ps_elp_wakeup(wl);
+        if (ret < 0)
+                goto out;
 
         wl12xx_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 
@@ -489,6 +492,7 @@ static void wl1251_irq_work(struct work_struct *work)
 
 out_sleep:
         wl12xx_ps_elp_sleep(wl);
+
 out:
         mutex_unlock(&wl->mutex);
 }