staging: r8712u: Do not queue cloned skb

Some post-3.4 kernels have a problem when a cloned skb is used in the
RX path. This patch handles one such case for r8712u.

The patch was suggested by Eric Dumazet.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>  [v3.4+]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/staging/rtl8712/rtl8712_recv.c b/drivers/staging/rtl8712/rtl8712_recv.c
index 4cd297aed788..c76732cdb183 100644
--- a/drivers/staging/rtl8712/rtl8712_recv.c
+++ b/drivers/staging/rtl8712/rtl8712_recv.c
@@ -1131,6 +1131,9 @@ static void recv_tasklet(void *priv)
                 recvbuf2recvframe(padapter, pskb);
                 skb_reset_tail_pointer(pskb);
                 pskb->len = 0;
-                skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
+                if (!skb_cloned(pskb))
+                        skb_queue_tail(&precvpriv->free_recv_skb_queue, pskb);
+                else
+                        consume_skb(pskb);
         }
 }