diff options
Diffstat (limited to 'net/dsa/tag_brcm.c')
| -rw-r--r-- | net/dsa/tag_brcm.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/net/dsa/tag_brcm.c b/net/dsa/tag_brcm.c index e6e0b7b6025c..2b06bb91318b 100644 --- a/net/dsa/tag_brcm.c +++ b/net/dsa/tag_brcm.c @@ -70,6 +70,18 @@ static struct sk_buff *brcm_tag_xmit_ll(struct sk_buff *skb, if (skb_cow_head(skb, BRCM_TAG_LEN) < 0) return NULL; + /* The Ethernet switch we are interfaced with needs packets to be at + * least 64 bytes (including FCS) otherwise they will be discarded when + * they enter the switch port logic. When Broadcom tags are enabled, we + * need to make sure that packets are at least 68 bytes + * (including FCS and tag) because the length verification is done after + * the Broadcom tag is stripped off the ingress packet. + * + * Let dsa_slave_xmit() free the SKB + */ + if (__skb_put_padto(skb, ETH_ZLEN + BRCM_TAG_LEN, false)) + return NULL; + skb_push(skb, BRCM_TAG_LEN); if (offset) |