rt2x00: fix usage of NULL queue
authorStanislaw Gruszka <sgruszka@redhat.com>
Tue, 2 Aug 2011 11:29:02 +0000 (13:29 +0200)
committerJohn W. Linville <linville@tuxdriver.com>
Tue, 2 Aug 2011 17:48:14 +0000 (13:48 -0400)
We may call rt2x00queue_pause_queue(queue) with queue == NULL. Bug
was introduced by commit 62fe778412b36791b7897cfa139342906fbbf07b
"rt2x00: Fix stuck queue in tx failure case" .

Cc: stable@kernel.org # 3.0+
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/rt2x00/rt2x00mac.c

index 8efab3983528a0e54d0f70bdeb96e2729c414c08..4ccf238059730cf20e589d9f567e35a3af3f189d 100644 (file)
@@ -113,7 +113,7 @@ void rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
         * due to possible race conditions in mac80211.
         */
        if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
-               goto exit_fail;
+               goto exit_free_skb;
 
        /*
         * Use the ATIM queue if appropriate and present.
@@ -127,7 +127,7 @@ void rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
                ERROR(rt2x00dev,
                      "Attempt to send packet over invalid queue %d.\n"
                      "Please file bug report to %s.\n", qid, DRV_PROJECT);
-               goto exit_fail;
+               goto exit_free_skb;
        }
 
        /*
@@ -159,6 +159,7 @@ void rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
 
  exit_fail:
        rt2x00queue_pause_queue(queue);
+ exit_free_skb:
        dev_kfree_skb_any(skb);
 }
 EXPORT_SYMBOL_GPL(rt2x00mac_tx);