diff options
| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2020-11-01 21:16:19 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-11-02 17:41:16 -0800 |
| commit | 9b9826ae117f211bcbdc75db844d5fd8b159fc59 (patch) | |
| tree | fb5d15da24870d2acdec6bd53a49301f96767866 /net | |
| parent | 952a06345015867e3bd37f8d9045fc1429637d43 (diff) | |
| download | linux-9b9826ae117f211bcbdc75db844d5fd8b159fc59.tar.bz2 | |
net: dsa: tag_gswip: 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.
This one is interesting, the DSA tag is 8 bytes on RX and 4 bytes on TX.
Because DSA is unaware of asymmetrical tag lengths, the overhead/needed
headroom is declared as 8 bytes and therefore 4 bytes larger than it
needs to be. If this becomes a problem, and the GSWIP driver can't be
converted to a uniform header length, we might need to make DSA aware of
separate RX/TX overhead values.
Cc: Hauke Mehrtens <hauke@hauke-m.de>
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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/dsa/tag_gswip.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/net/dsa/tag_gswip.c b/net/dsa/tag_gswip.c index 408d4af390a0..2f5bd5e338ab 100644 --- a/net/dsa/tag_gswip.c +++ b/net/dsa/tag_gswip.c @@ -60,13 +60,8 @@ static struct sk_buff *gswip_tag_xmit(struct sk_buff *skb, struct net_device *dev) { struct dsa_port *dp = dsa_slave_to_port(dev); - int err; u8 *gswip_tag; - err = skb_cow_head(skb, GSWIP_TX_HEADER_LEN); - if (err) - return NULL; - skb_push(skb, GSWIP_TX_HEADER_LEN); gswip_tag = skb->data; |