Remove Tx mbuf parsing code for VLAN in TSO path. Controller does

not support TSO over VLAN if VLAN hardware tagging is disabled so
there is no need to check VLAN here.
While I'm here make sure to pullup IP/TCP headers in the first
buffer.

1 files changed, 5 insertions, 18 deletions

diff --git a/sys/dev/bge/if_bge.c b/sys/dev/bge/if_bge.c
index 3768852..cd28479 100644
--- a/sys/dev/bge/if_bge.c
+++ b/sys/dev/bge/if_bge.c
@@ -3835,12 +3835,11 @@ bge_cksum_pad(struct mbuf *m)
 static struct mbuf *
 bge_setup_tso(struct bge_softc *sc, struct mbuf *m, uint16_t *mss)
 {
-	struct ether_header *eh;
 	struct ip *ip;
 	struct tcphdr *tcp;
 	struct mbuf *n;
 	uint16_t hlen;
-	uint32_t ip_off, poff;
+	uint32_t poff;
 
 	if (M_WRITABLE(m) == 0) {
 		/* Get a writable copy. */
@@ -3850,28 +3849,16 @@ bge_setup_tso(struct bge_softc *sc, struct mbuf *m, uint16_t *mss)
 			return (NULL);
 		m = n;
 	}
-	ip_off = sizeof(struct ether_header);
-	m = m_pullup(m, ip_off);
+	m = m_pullup(m, sizeof(struct ether_header) + sizeof(struct ip));
 	if (m == NULL)
 		return (NULL);
-	eh = mtod(m, struct ether_header *);
-	/* Check the existence of VLAN tag. */
-	if (eh->ether_type == htons(ETHERTYPE_VLAN)) {
-		ip_off = sizeof(struct ether_vlan_header);
-		m = m_pullup(m, ip_off);
-		if (m == NULL)
-			return (NULL);
-	}
-	m = m_pullup(m, ip_off + sizeof(struct ip));
-	if (m == NULL)
-		return (NULL);
-	ip = (struct ip *)(mtod(m, char *) + ip_off);
-	poff = ip_off + (ip->ip_hl << 2);
+	ip = (struct ip *)(mtod(m, char *) + sizeof(struct ether_header));
+	poff = sizeof(struct ether_header) + (ip->ip_hl << 2);
 	m = m_pullup(m, poff + sizeof(struct tcphdr));
 	if (m == NULL)
 		return (NULL);
 	tcp = (struct tcphdr *)(mtod(m, char *) + poff);
-	m = m_pullup(m, poff + sizeof(struct tcphdr) + tcp->th_off);
+	m = m_pullup(m, poff + (tcp->th_off << 2));
 	if (m == NULL)
 		return (NULL);
 	/*