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scsi: lpfc: correct nvme sg segment count check

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The internal cfg flag is actually smaller, by 1 (for a partial page
sge), than the sg list maintained by the driver. Thus the check on sg
segments errored out when it shouldn't have

Ensure the check is +1

Note: having a value that is less than what it really is is bogus.
Correcting it now would be a significant rework. Add this item to the
list to be refactored in the merge with efct.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2017-09-29 17:34:46 -07:00 committed by Martin K. Petersen
parent 1abcb3718b
commit 29bfd55a9c
1 changed files with 2 additions and 2 deletions
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4
drivers/scsi/lpfc/lpfc_nvme.c
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@ -1149,12 +1149,12 @@ lpfc_nvme_prep_io_dma(struct lpfc_vport *vport,
first_data_sgl = sgl;
lpfc_ncmd->seg_cnt = nCmd->sg_cnt;
if (lpfc_ncmd->seg_cnt > phba->cfg_nvme_seg_cnt) {
if (lpfc_ncmd->seg_cnt > phba->cfg_nvme_seg_cnt + 1) {
lpfc_printf_log(phba, KERN_ERR, LOG_NVME_IOERR,
"6058 Too many sg segments from "
"NVME Transport. Max %d, "
"nvmeIO sg_cnt %d\n",
phba->cfg_nvme_seg_cnt,
phba->cfg_nvme_seg_cnt + 1,
lpfc_ncmd->seg_cnt);
lpfc_ncmd->seg_cnt = 0;
return 1;