xen-netback: fix some error return code

'err' is overwrited to 0 after maybe_pull_tail() call, so the error code was not set if skb_partial_csum_set() call failed. Fix to return error -EPROTO from those error handling case instead of 0. Fixes: d52eb0d ('xen-netback: make sure skb linear area covers checksum field') Signed-off-by: Wei Yongjun <[email protected]> Acked-by: Wei Liu <[email protected]> Signed-off-by: David S. Miller <[email protected]>
rtvt123 · Dec 19, 2013 · 0c8d087 · 0c8d087
1 parent b1aac81
commit 0c8d087
Showing 1 changed file with 12 additions and 4 deletions.
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
@@ -1209,8 +1209,10 @@ static int checksum_setup_ip(struct xenvif *vif, struct sk_buff *skb,
 			goto out;
 
 		if (!skb_partial_csum_set(skb, off,
-					  offsetof(struct tcphdr, check)))
+					  offsetof(struct tcphdr, check))) {
+			err = -EPROTO;
 			goto out;
+		}
 
 		if (recalculate_partial_csum)
 			tcp_hdr(skb)->check =
@@ -1227,8 +1229,10 @@ static int checksum_setup_ip(struct xenvif *vif, struct sk_buff *skb,
 			goto out;
 
 		if (!skb_partial_csum_set(skb, off,
-					  offsetof(struct udphdr, check)))
+					  offsetof(struct udphdr, check))) {
+			err = -EPROTO;
 			goto out;
+		}
 
 		if (recalculate_partial_csum)
 			udp_hdr(skb)->check =
@@ -1350,8 +1354,10 @@ static int checksum_setup_ipv6(struct xenvif *vif, struct sk_buff *skb,
 			goto out;
 
 		if (!skb_partial_csum_set(skb, off,
-					  offsetof(struct tcphdr, check)))
+					  offsetof(struct tcphdr, check))) {
+			err = -EPROTO;
 			goto out;
+		}
 
 		if (recalculate_partial_csum)
 			tcp_hdr(skb)->check =
@@ -1368,8 +1374,10 @@ static int checksum_setup_ipv6(struct xenvif *vif, struct sk_buff *skb,
 			goto out;
 
 		if (!skb_partial_csum_set(skb, off,
-					  offsetof(struct udphdr, check)))
+					  offsetof(struct udphdr, check))) {
+			err = -EPROTO;
 			goto out;
+		}
 
 		if (recalculate_partial_csum)
 			udp_hdr(skb)->check =