wl12xx_sdio: enable wowlan only if enable_irq_wake() succeeded

Some platforms don't support the wake_irq, so disable wowlan
in this case, and avoid the "Unbalanced IRQ wake disable"
warning on disable_irq_wake().

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>

2 files changed, 16 insertions, 11 deletions

diff --git a/drivers/net/wireless/wl12xx/sdio.c b/drivers/net/wireless/wl12xx/sdio.c
index 25215199049f..4dc4573b6861 100644
--- a/drivers/net/wireless/wl12xx/sdio.c
+++ b/drivers/net/wireless/wl12xx/sdio.c
@@ -272,17 +272,19 @@ static int __devinit wl1271_probe(struct sdio_func *func,
                 goto out_free;
         }
 
-        enable_irq_wake(wl->irq);
-        device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 1);
+        ret = enable_irq_wake(wl->irq);
+        if (!ret) {
+                wl->irq_wake_enabled = true;
+                device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 1);
 
-        disable_irq(wl->irq);
-
-        /* if sdio can keep power while host is suspended, enable wow */
-        mmcflags = sdio_get_host_pm_caps(func);
-        wl1271_debug(DEBUG_SDIO, "sdio PM caps = 0x%x", mmcflags);
+                /* if sdio can keep power while host is suspended, enable wow */
+                mmcflags = sdio_get_host_pm_caps(func);
+                wl1271_debug(DEBUG_SDIO, "sdio PM caps = 0x%x", mmcflags);
 
-        if (mmcflags & MMC_PM_KEEP_POWER)
-                hw->wiphy->wowlan.flags = WIPHY_WOWLAN_ANY;
+                if (mmcflags & MMC_PM_KEEP_POWER)
+                        hw->wiphy->wowlan.flags = WIPHY_WOWLAN_ANY;
+        }
+        disable_irq(wl->irq);
 
         ret = wl1271_init_ieee80211(wl);
         if (ret)
@@ -316,8 +318,10 @@ static void __devexit wl1271_remove(struct sdio_func *func)
         pm_runtime_get_noresume(&func->dev);
 
         wl1271_unregister_hw(wl);
-        device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 0);
-        disable_irq_wake(wl->irq);
+        if (wl->irq_wake_enabled) {
+                device_init_wakeup(wl1271_sdio_wl_to_dev(wl), 0);
+                disable_irq_wake(wl->irq);
+        }
         free_irq(wl->irq, wl);
         wl1271_free_hw(wl);
 }
diff --git a/drivers/net/wireless/wl12xx/wl12xx.h b/drivers/net/wireless/wl12xx/wl12xx.h
index 8d6c8f258413..145a14c22583 100644
--- a/drivers/net/wireless/wl12xx/wl12xx.h
+++ b/drivers/net/wireless/wl12xx/wl12xx.h
@@ -580,6 +580,7 @@ struct wl1271 {
          * (currently, only "ANY" trigger is supported)
          */
         bool wow_enabled;
+        bool irq_wake_enabled;
 
         /*
          * AP-mode - links indexed by HLID. The global and broadcast links