staging: ion: add dma_map_sg/dma_umap_sg to map_dma_buf

[firefly-linux-kernel-4.4.55.git] / net / phonet / af_phonet.c

diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c
index 10d42f3220ab469b3e23050c99af72cb39c81452..f925753668a7f57495f8216c18c6102b940935e6 100644 (file)
--- a/net/phonet/af_phonet.c
+++ b/net/phonet/af_phonet.c
@@ -377,6 +377,10 @@ static int phonet_rcv(struct sk_buff *skb, struct net_device *dev,
        struct sockaddr_pn sa;
        u16 len;
 
+       skb = skb_share_check(skb, GFP_ATOMIC);
+       if (!skb)
+               return NET_RX_DROP;
+
        /* check we have at least a full Phonet header */
        if (!pskb_pull(skb, sizeof(struct phonethdr)))
                goto out;