From: Vladimir Oltean Date: Sun, 1 Nov 2020 19:16:16 +0000 (+0200) Subject: net: dsa: tag_edsa: let DSA core deal with TX reallocation X-Git-Tag: v5.11-rc1~169^2~385^2~4 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=c6c4e1237dfe731644e79fa06d073625f28cd945;p=tomoyo%2Ftomoyo-test1.git net: dsa: tag_edsa: let DSA core deal with TX reallocation 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. Note that the VLAN code path needs a smaller extra headroom than the regular EtherType DSA path. That isn't a problem, because this tagger declares the larger tag length (8 bytes vs 4) as the protocol overhead, so we are covered in both cases. Cc: Andrew Lunn Signed-off-by: Vladimir Oltean Reviewed-by: Florian Fainelli Signed-off-by: Jakub Kicinski --- diff --git a/net/dsa/tag_edsa.c b/net/dsa/tag_edsa.c index 120614240319..abf70a29deb4 100644 --- a/net/dsa/tag_edsa.c +++ b/net/dsa/tag_edsa.c @@ -35,8 +35,6 @@ static struct sk_buff *edsa_xmit(struct sk_buff *skb, struct net_device *dev) * current ethertype field if the packet is untagged. */ if (skb->protocol == htons(ETH_P_8021Q)) { - if (skb_cow_head(skb, DSA_HLEN) < 0) - return NULL; skb_push(skb, DSA_HLEN); memmove(skb->data, skb->data + DSA_HLEN, 2 * ETH_ALEN); @@ -60,8 +58,6 @@ static struct sk_buff *edsa_xmit(struct sk_buff *skb, struct net_device *dev) edsa_header[6] &= ~0x10; } } else { - if (skb_cow_head(skb, EDSA_HLEN) < 0) - return NULL; skb_push(skb, EDSA_HLEN); memmove(skb->data, skb->data + EDSA_HLEN, 2 * ETH_ALEN);