net: dsa: factor skb freeing on xmit
As of a86d8becc3f0 ("net: dsa: Factor bottom tag receive functions"),
the rcv caller frees the original SKB in case or error.
Be symmetric with that and make the xmit caller do the same.
At the same time, fix the checkpatch NULL comparison check:
CHECK: Comparison to NULL could be written "!nskb"
#208: FILE: net/dsa/tag_trailer.c:35:
+ if (nskb == NULL)
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dsa/tag_qca.c b/net/dsa/tag_qca.c
index 44f545d..4f43cf0 100644
--- a/net/dsa/tag_qca.c
+++ b/net/dsa/tag_qca.c
@@ -45,7 +45,7 @@ static struct sk_buff *qca_tag_xmit(struct sk_buff *skb, struct net_device *dev)
dev->stats.tx_bytes += skb->len;
if (skb_cow_head(skb, 0) < 0)
- goto out_free;
+ return NULL;
skb_push(skb, QCA_HDR_LEN);
@@ -60,10 +60,6 @@ static struct sk_buff *qca_tag_xmit(struct sk_buff *skb, struct net_device *dev)
*phdr = htons(hdr);
return skb;
-
-out_free:
- kfree_skb(skb);
- return NULL;
}
static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev,
