drivers: net: fix return value check in emac_tso_csum()

in emac_tso_csum(), return an error code 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/qualcomm/emac/emac-mac.c b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
index 0d80447d4d3b4943221a983eb5a7d58f4ee9ad34..d5c688a8d7bec0535ed0d714f83d78b04be1baeb 100644 (file)
--- a/drivers/net/ethernet/qualcomm/emac/emac-mac.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
@@ -1260,8 +1260,11 @@ static int emac_tso_csum(struct emac_adapter *adpt,
                if (skb->protocol == htons(ETH_P_IP)) {
                        u32 pkt_len = ((unsigned char *)ip_hdr(skb) - skb->data)
                                       + ntohs(ip_hdr(skb)->tot_len);
-                       if (skb->len > pkt_len)
-                               pskb_trim(skb, pkt_len);
+                       if (skb->len > pkt_len) {
+                               ret = pskb_trim(skb, pkt_len);
+                               if (unlikely(ret))
+                                       return ret;
+                       }
                }
 
                hdr_len = skb_tcp_all_headers(skb);