1 files changed, 21 insertions, 11 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-scan.c b/drivers/net/wireless/iwlwifi/iwl-scan.c
index bd2f7c420563..12e455a4b90e 100644
--- a/drivers/net/wireless/iwlwifi/iwl-scan.c
+++ b/drivers/net/wireless/iwlwifi/iwl-scan.c
@@ -25,6 +25,7 @@
  *  Intel Linux Wireless <ilw@linux.intel.com>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *****************************************************************************/
+#include <linux/slab.h>
 #include <linux/types.h>
 #include <linux/etherdevice.h>
 #include <net/mac80211.h>
@@ -469,6 +470,8 @@ EXPORT_SYMBOL(iwl_init_scan_params);
 
 static int iwl_scan_initiate(struct iwl_priv *priv)
 {
+        WARN_ON(!mutex_is_locked(&priv->mutex));
+
         IWL_DEBUG_INFO(priv, "Starting scan...\n");
         set_bit(STATUS_SCANNING, &priv->status);
         priv->is_internal_short_scan = false;
@@ -546,24 +549,31 @@ EXPORT_SYMBOL(iwl_mac_hw_scan);
  * internal short scan, this function should only been called while associated.
  * It will reset and tune the radio to prevent possible RF related problem
  */
-int iwl_internal_short_hw_scan(struct iwl_priv *priv)
+void iwl_internal_short_hw_scan(struct iwl_priv *priv)
 {
-        int ret = 0;
+        queue_work(priv->workqueue, &priv->start_internal_scan);
+}
+
+static void iwl_bg_start_internal_scan(struct work_struct *work)
+{
+        struct iwl_priv *priv =
+                container_of(work, struct iwl_priv, start_internal_scan);
+
+        mutex_lock(&priv->mutex);
 
         if (!iwl_is_ready_rf(priv)) {
-                ret = -EIO;
                 IWL_DEBUG_SCAN(priv, "not ready or exit pending\n");
-                goto out;
+                goto unlock;
         }
+
         if (test_bit(STATUS_SCANNING, &priv->status)) {
                 IWL_DEBUG_SCAN(priv, "Scan already in progress.\n");
-                ret = -EAGAIN;
-                goto out;
+                goto unlock;
         }
+
         if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
                 IWL_DEBUG_SCAN(priv, "Scan request while abort pending\n");
-                ret = -EAGAIN;
-                goto out;
+                goto unlock;
         }
 
         priv->scan_bands = 0;
@@ -576,9 +586,8 @@ int iwl_internal_short_hw_scan(struct iwl_priv *priv)
         set_bit(STATUS_SCANNING, &priv->status);
         priv->is_internal_short_scan = true;
         queue_work(priv->workqueue, &priv->request_scan);
-
-out:
-        return ret;
+ unlock:
+        mutex_unlock(&priv->mutex);
 }
 EXPORT_SYMBOL(iwl_internal_short_hw_scan);
 
@@ -964,6 +973,7 @@ void iwl_setup_scan_deferred_work(struct iwl_priv *priv)
         INIT_WORK(&priv->scan_completed, iwl_bg_scan_completed);
         INIT_WORK(&priv->request_scan, iwl_bg_request_scan);
         INIT_WORK(&priv->abort_scan, iwl_bg_abort_scan);
+        INIT_WORK(&priv->start_internal_scan, iwl_bg_start_internal_scan);
         INIT_DELAYED_WORK(&priv->scan_check, iwl_bg_scan_check);
 }
 EXPORT_SYMBOL(iwl_setup_scan_deferred_work);