In order to reduce code duplication between ptp drivers, generic helper
functions were introduced. Use them.

Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
---
 drivers/net/phy/dp83640.c | 69 +++++++++------------------------------
 1 file changed, 16 insertions(+), 53 deletions(-)

diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 50fb7d16b75a..1cd987e3d0f2 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c

@@ -803,46 +803,28 @@ static int decode_evnt(struct dp83640_private *dp83640,
 
 static int match(struct sk_buff *skb, unsigned int type, struct rxts *rxts)
 {
-	unsigned int offset = 0;
-	u8 *msgtype, *data = skb_mac_header(skb);
-	__be16 *seqid;
+	struct ptp_header *hdr;
+	u8 msgtype;
+	u16 seqid;
 	u16 hash;
 
 	/* check sequenceID, messageType, 12 bit hash of offset 20-29 */
 
-	if (type & PTP_CLASS_VLAN)
-		offset += VLAN_HLEN;
-
-	switch (type & PTP_CLASS_PMASK) {
-	case PTP_CLASS_IPV4:
-		offset += ETH_HLEN + IPV4_HLEN(data + offset) + UDP_HLEN;
-		break;
-	case PTP_CLASS_IPV6:
-		offset += ETH_HLEN + IP6_HLEN + UDP_HLEN;
-		break;
-	case PTP_CLASS_L2:
-		offset += ETH_HLEN;
-		break;
-	default:
+	hdr = ptp_parse_header(skb, type);
+	if (!hdr)
 		return 0;
-	}
 
-	if (skb->len + ETH_HLEN < offset + OFF_PTP_SEQUENCE_ID + sizeof(*seqid))
-		return 0;
+	msgtype = ptp_get_msgtype(hdr, type);
 
-	if (unlikely(type & PTP_CLASS_V1))
-		msgtype = data + offset + OFF_PTP_CONTROL;
-	else
-		msgtype = data + offset;
-	if (rxts->msgtype != (*msgtype & 0xf))
+	if (rxts->msgtype != (msgtype & 0xf))
 		return 0;
 
-	seqid = (__be16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
-	if (rxts->seqid != ntohs(*seqid))
+	seqid = be16_to_cpu(hdr->sequence_id);
+	if (rxts->seqid != seqid)
 		return 0;
 
 	hash = ether_crc(DP83640_PACKET_HASH_LEN,
-			 data + offset + DP83640_PACKET_HASH_OFFSET) >> 20;
+			 (unsigned char *)&hdr->source_port_identity) >> 20;