[SCSI] libfc: Remove FC_FRAME_SG_LEN in fc_fcp_send_data

FC_FRAME_SG_LEN is 4 which is too small when offload is enabled. Actually, the
WARN_ON() in fc_fcp_send_data() should be:

	WARN_ON(skb_shinfo(fp_skb(fp))->nr_frags > MAX_SKB_FRAGS);

But since we will not get anything more than 64K anyway, so there is no need
to do this anyway here. Therefore, I am getting rid of FC_FRAME_SG_LEN here
and the WARN_ON here.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

2 files changed, 0 insertions, 9 deletions

diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index e303e0d12c4b..2069edf80268 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -569,8 +569,6 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
                 }
                 sg_bytes = min(tlen, sg->length - offset);
                 if (using_sg) {
-                        WARN_ON(skb_shinfo(fp_skb(fp))->nr_frags >
-                                FC_FRAME_SG_LEN);
                         get_page(sg_page(sg));
                         skb_fill_page_desc(fp_skb(fp),
                                            skb_shinfo(fp_skb(fp))->nr_frags,
diff --git a/include/scsi/fc_frame.h b/include/scsi/fc_frame.h
index 59511057cee0..c35d2383cc26 100644
--- a/include/scsi/fc_frame.h
+++ b/include/scsi/fc_frame.h
@@ -37,13 +37,6 @@
 #define FC_FRAME_HEADROOM       32      /* headroom for VLAN + FCoE headers */
 #define FC_FRAME_TAILROOM       8       /* trailer space for FCoE */
 
-/*
- * Information about an individual fibre channel frame received or to be sent.
- * The buffer may be in up to 4 additional non-contiguous sections,
- * but the linear section must hold the frame header.
- */
-#define FC_FRAME_SG_LEN         4       /* scatter/gather list maximum length */
-
 #define fp_skb(fp)      (&((fp)->skb))
 #define fr_hdr(fp)      ((fp)->skb.data)
 #define fr_len(fp)      ((fp)->skb.len)