ethernet: ti: am65-cpts: Use generic helper function (4bccb5d0) · Commits · 戴 / test

drivers/net/ethernet/ti/am65-cpts.c

+9 −28

Original line number	Diff line number	Diff line
		@@ -748,42 +748,23 @@ EXPORT_SYMBOL_GPL(am65_cpts_rx_enable);
		static int am65_skb_get_mtype_seqid(struct sk_buff skb, u32 mtype_seqid)
		{
		unsigned int ptp_class = ptp_classify_raw(skb);
		u8 msgtype, data = skb->data;
		unsigned int offset = 0;
		__be16 *seqid;
		struct ptp_header *hdr;
		u8 msgtype;
		u16 seqid;

		if (ptp_class == PTP_CLASS_NONE)
		return 0;

		if (ptp_class & PTP_CLASS_VLAN)
		offset += VLAN_HLEN;

		switch (ptp_class & 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:
		return 0;
		}

		if (skb->len + ETH_HLEN < offset + OFF_PTP_SEQUENCE_ID + sizeof(*seqid))
		hdr = ptp_parse_header(skb, ptp_class);
		if (!hdr)
		return 0;

		if (unlikely(ptp_class & PTP_CLASS_V1))
		msgtype = data + offset + OFF_PTP_CONTROL;
		else
		msgtype = data + offset;
		msgtype = ptp_get_msgtype(hdr, ptp_class);
		seqid = ntohs(hdr->sequence_id);

		seqid = (__be16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
		mtype_seqid = (msgtype << AM65_CPTS_EVENT_1_MESSAGE_TYPE_SHIFT) &
		*mtype_seqid = (msgtype << AM65_CPTS_EVENT_1_MESSAGE_TYPE_SHIFT) &
		AM65_CPTS_EVENT_1_MESSAGE_TYPE_MASK;
		mtype_seqid \|= (ntohs(seqid) & AM65_CPTS_EVENT_1_SEQUENCE_ID_MASK);
		*mtype_seqid \|= (seqid & AM65_CPTS_EVENT_1_SEQUENCE_ID_MASK);

		return 1;
		}