net: dsa: tag_qca: let DSA core deal with TX reallocation

[ Upstream commit 9bbda29ae1044bc4c1c01a5b7c44688c4765785f ]

Now that we have a central TX reallocation procedure that accounts for
the tagger's needed headroom in a generic way, we can remove the
skb_cow_head call.

Cc: John Crispin <john@phrozen.org>
Cc: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/dsa/tag_qca.c b/net/dsa/tag_qca.c
index 1b9e850..88181b5 100644 (file)
--- a/net/dsa/tag_qca.c
+++ b/net/dsa/tag_qca.c
@@ -34,9 +34,6 @@ static struct sk_buff *qca_tag_xmit(struct sk_buff *skb, struct net_device *dev)
        __be16 *phdr;
        u16 hdr;
 
-       if (skb_cow_head(skb, QCA_HDR_LEN) < 0)
-               return NULL;
-
        skb_push(skb, QCA_HDR_LEN);
 
        memmove(skb->data, skb->data + QCA_HDR_LEN, 2 * ETH_ALEN);