+ fr = fcoe_dev_from_skb(skb);
+ lport = fr->fr_dev;
+ if (unlikely(!lport)) {
+ if (skb->destructor != fcoe_percpu_flush_done)
+ FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
+ kfree_skb(skb);
+ return;
+ }
+
+ FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
+ "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
+ skb->len, skb->data_len,
+ skb->head, skb->data, skb_tail_pointer(skb),
+ skb_end_pointer(skb), skb->csum,
+ skb->dev ? skb->dev->name : "<NULL>");
+
+ /*
+ * Save source MAC address before discarding header.
+ */
+ port = lport_priv(lport);
+ if (skb_is_nonlinear(skb))
+ skb_linearize(skb); /* not ideal */
+ mac = eth_hdr(skb)->h_source;
+
+ /*
+ * Frame length checks and setting up the header pointers
+ * was done in fcoe_rcv already.
+ */
+ hp = (struct fcoe_hdr *) skb_network_header(skb);
+ fh = (struct fc_frame_header *) skb_transport_header(skb);
+
+ stats = fc_lport_get_stats(lport);
+ if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
+ if (stats->ErrorFrames < 5)
+ printk(KERN_WARNING "fcoe: FCoE version "
+ "mismatch: The frame has "
+ "version %x, but the "
+ "initiator supports version "
+ "%x\n", FC_FCOE_DECAPS_VER(hp),
+ FC_FCOE_VER);
+ stats->ErrorFrames++;
+ kfree_skb(skb);
+ return;
+ }
+
+ skb_pull(skb, sizeof(struct fcoe_hdr));
+ fr_len = skb->len - sizeof(struct fcoe_crc_eof);
+
+ stats->RxFrames++;
+ stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
+
+ fp = (struct fc_frame *)skb;
+ fc_frame_init(fp);
+ fr_dev(fp) = lport;
+ fr_sof(fp) = hp->fcoe_sof;
+
+ /* Copy out the CRC and EOF trailer for access */
+ if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
+ kfree_skb(skb);
+ return;
+ }
+ fr_eof(fp) = crc_eof.fcoe_eof;
+ fr_crc(fp) = crc_eof.fcoe_crc32;
+ if (pskb_trim(skb, fr_len)) {
+ kfree_skb(skb);
+ return;
+ }
+
+ /*
+ * We only check CRC if no offload is available and if it is
+ * it's solicited data, in which case, the FCP layer would
+ * check it during the copy.
+ */
+ if (lport->crc_offload &&
+ skb->ip_summed == CHECKSUM_UNNECESSARY)
+ fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
+ else
+ fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
+
+ fh = fc_frame_header_get(fp);
+ if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
+ fh->fh_type == FC_TYPE_FCP) {
+ fc_exch_recv(lport, fp);
+ return;
+ }
+ if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
+ if (le32_to_cpu(fr_crc(fp)) !=
+ ~crc32(~0, skb->data, fr_len)) {
+ if (stats->InvalidCRCCount < 5)
+ printk(KERN_WARNING "fcoe: dropping "
+ "frame with CRC error\n");
+ stats->InvalidCRCCount++;
+ stats->ErrorFrames++;
+ fc_frame_free(fp);
+ return;
+ }
+ fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
+ }
+ fc_exch_recv(lport, fp);
+}
+
+/**
+ * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
+ * @arg: The per-CPU context
+ *
+ * Return: 0 for success
+ */
+int fcoe_percpu_receive_thread(void *arg)
+{
+ struct fcoe_percpu_s *p = arg;
+ struct sk_buff *skb;
+