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>

diff --git a/drivers/net/wireless/ath/carl9170/main.c b/drivers/net/wireless/ath/carl9170/main.c
index ea49d54ce03bf12fd382abf4a1f61c801eace4f1..43de9dfa58208c0b38de62a2c04b341057d290e0 100644 (file)
--- 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;