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[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>
This commit is contained in:
Yi Zou 2009-07-29 17:05:32 -07:00 committed by James Bottomley
parent 15a521b424
commit 537029f8e9
2 changed files with 0 additions and 9 deletions
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2
drivers/scsi/libfc/fc_fcp.c
View File

@ -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,

7
include/scsi/fc_frame.h
View File

@ -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)