b43: fix tx path skb leaks

ieee80211_free_txskb() needs to be used instead of dev_kfree_skb_any for
tx packets passed to the driver from mac80211

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@vger.kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 15 insertions, 8 deletions

diff --git a/drivers/net/wireless/b43/dma.c b/drivers/net/wireless/b43/dma.c
index 777cd74921d7..38bc5a7997ff 100644
--- a/drivers/net/wireless/b43/dma.c
+++ b/drivers/net/wireless/b43/dma.c
@@ -409,7 +409,10 @@ static inline
                                 struct b43_dmadesc_meta *meta)
 {
         if (meta->skb) {
-                dev_kfree_skb_any(meta->skb);
+                if (ring->tx)
+                        ieee80211_free_txskb(ring->dev->wl->hw, meta->skb);
+                else
+                        dev_kfree_skb_any(meta->skb);
                 meta->skb = NULL;
         }
 }
@@ -1454,7 +1457,7 @@ int b43_dma_tx(struct b43_wldev *dev, struct sk_buff *skb)
         if (unlikely(err == -ENOKEY)) {
                 /* Drop this packet, as we don't have the encryption key
                  * anymore and must not transmit it unencrypted. */
-                dev_kfree_skb_any(skb);
+                ieee80211_free_txskb(dev->wl->hw, skb);
                 err = 0;
                 goto out;
         }
diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index ddd6a4f78097..16ab280359bd 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -3397,7 +3397,7 @@ static void b43_tx_work(struct work_struct *work)
                                 break;
                         }
                         if (unlikely(err))
-                                dev_kfree_skb(skb); /* Drop it */
+                                ieee80211_free_txskb(wl->hw, skb);
                         err = 0;
                 }
 
@@ -3419,7 +3419,7 @@ static void b43_op_tx(struct ieee80211_hw *hw,
 
         if (unlikely(skb->len < 2 + 2 + 6)) {
                 /* Too short, this can't be a valid frame. */
-                dev_kfree_skb_any(skb);
+                ieee80211_free_txskb(hw, skb);
                 return;
         }
         B43_WARN_ON(skb_shinfo(skb)->nr_frags);
@@ -4229,8 +4229,12 @@ redo:
 
         /* Drain all TX queues. */
         for (queue_num = 0; queue_num < B43_QOS_QUEUE_NUM; queue_num++) {
-                while (skb_queue_len(&wl->tx_queue[queue_num]))
-                        dev_kfree_skb(skb_dequeue(&wl->tx_queue[queue_num]));
+                while (skb_queue_len(&wl->tx_queue[queue_num])) {
+                        struct sk_buff *skb;
+
+                        skb = skb_dequeue(&wl->tx_queue[queue_num]);
+                        ieee80211_free_txskb(wl->hw, skb);
+                }
         }
 
         b43_mac_suspend(dev);
diff --git a/drivers/net/wireless/b43/pio.c b/drivers/net/wireless/b43/pio.c
index 3533ab86bd36..a73ff8c9deb5 100644
--- a/drivers/net/wireless/b43/pio.c
+++ b/drivers/net/wireless/b43/pio.c
@@ -196,7 +196,7 @@ static void b43_pio_cancel_tx_packets(struct b43_pio_txqueue *q)
         for (i = 0; i < ARRAY_SIZE(q->packets); i++) {
                 pack = &(q->packets[i]);
                 if (pack->skb) {
-                        dev_kfree_skb_any(pack->skb);
+                        ieee80211_free_txskb(q->dev->wl->hw, pack->skb);
                         pack->skb = NULL;
                 }
         }
@@ -552,7 +552,7 @@ int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
         if (unlikely(err == -ENOKEY)) {
                 /* Drop this packet, as we don't have the encryption key
                  * anymore and must not transmit it unencrypted. */
-                dev_kfree_skb_any(skb);
+                ieee80211_free_txskb(dev->wl->hw, skb);
                 err = 0;
                 goto out;
         }