drivers:net: fix return value check in ocelot_fdma_receive_skb

ocelot_fdma_receive_skb should return false if an unexpected
value is returned by pskb_trim.

Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/mscc/ocelot_fdma.c b/drivers/net/ethernet/mscc/ocelot_fdma.c
index 8e3894cf5f7cd3ee469f26bb305c9f0a72962c55..83a3ce0c568e8bba94f0faea1c31dbfcde6b5757 100644 (file)
--- a/drivers/net/ethernet/mscc/ocelot_fdma.c
+++ b/drivers/net/ethernet/mscc/ocelot_fdma.c
@@ -368,7 +368,8 @@ static bool ocelot_fdma_receive_skb(struct ocelot *ocelot, struct sk_buff *skb)
        if (unlikely(!ndev))
                return false;
 
-       pskb_trim(skb, skb->len - ETH_FCS_LEN);
+       if (pskb_trim(skb, skb->len - ETH_FCS_LEN))
+               return false;
 
        skb->dev = ndev;
        skb->protocol = eth_type_trans(skb, skb->dev);