[SCSI] fcoe: fcoe fc crc offload indication by skb->ip_summed

If LLD supports FCCRC offload, it should set ip_summed to be
CHECKSUM_UNNECESSARY so we don't have to do CRC check again.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index 5dae823..0d6f5be 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -633,7 +633,7 @@
 		 * it's solicited data, in which case, the FCP layer would
 		 * check it during the copy.
 		 */
-		if (lp->crc_offload)
+		if (lp->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
 			fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
 		else
 			fr_flags(fp) |= FCPHF_CRC_UNCHECKED;