diff options
Diffstat (limited to 'net/dsa/tag_qca.c')
| -rw-r--r-- | net/dsa/tag_qca.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/net/dsa/tag_qca.c b/net/dsa/tag_qca.c index f8df49d5956f..f17ed5be20c2 100644 --- a/net/dsa/tag_qca.c +++ b/net/dsa/tag_qca.c @@ -32,10 +32,12 @@ static struct sk_buff *qca_tag_xmit(struct sk_buff *skb, struct net_device *dev) static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev) { - u8 ver; - u16 hdr; - int port; + u8 ver, pk_type; __be16 *phdr; + int port; + u16 hdr; + + BUILD_BUG_ON(sizeof(struct qca_mgmt_ethhdr) != QCA_HDR_MGMT_HEADER_LEN + QCA_HDR_LEN); if (unlikely(!pskb_may_pull(skb, QCA_HDR_LEN))) return NULL; @@ -48,6 +50,13 @@ static struct sk_buff *qca_tag_rcv(struct sk_buff *skb, struct net_device *dev) if (unlikely(ver != QCA_HDR_VERSION)) return NULL; + /* Get pk type */ + pk_type = FIELD_GET(QCA_HDR_RECV_TYPE, hdr); + + /* Ethernet MDIO read/write packet */ + if (pk_type == QCA_HDR_RECV_TYPE_RW_REG_ACK) + return NULL; + /* Remove QCA tag and recalculate checksum */ skb_pull_rcsum(skb, QCA_HDR_LEN); dsa_strip_etype_header(skb, QCA_HDR_LEN); |