carl9170: fix hang in AP mode when HT STA does PSM

This is a obvious bug, skb_queue_walk does not
work if the iterator gets removed from the queue.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/carl9170/main.c b/drivers/net/wireless/ath/carl9170/main.c
index ea49d54ce03b..43de9dfa5820 100644
--- a/drivers/net/wireless/ath/carl9170/main.c
+++ b/drivers/net/wireless/ath/carl9170/main.c
@@ -1412,7 +1412,7 @@ static void carl9170_op_sta_notify(struct ieee80211_hw *hw,
 {
         struct ar9170 *ar = hw->priv;
         struct carl9170_sta_info *sta_info = (void *) sta->drv_priv;
-        struct sk_buff *skb;
+        struct sk_buff *skb, *tmp;
         struct sk_buff_head free;
         int i;
 
@@ -1462,7 +1462,7 @@ static void carl9170_op_sta_notify(struct ieee80211_hw *hw,
 
                 for (i = 0; i < ar->hw->queues; i++) {
                         spin_lock_bh(&ar->tx_pending[i].lock);
-                        skb_queue_walk(&ar->tx_pending[i], skb) {
+                        skb_queue_walk_safe(&ar->tx_pending[i], skb, tmp) {
                                 struct _carl9170_tx_superframe *super;
                                 struct ieee80211_hdr *hdr;