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lpfc: Fix scsi prep dma buf error. 

Didn't check for less-than-or-equal zero. Means we may later call
scsi_dma_unmap() even though we don't have valid mappings.

Signed-off-by: Dick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: James Smart <james.smart@avagotech.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
This commit is contained in:
James Smart 2015-05-22 10:42:39 -04:00 committed by James Bottomley
parent 8b0dff1416
commit 5116fbf136
1 changed files with 1 additions and 1 deletions
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2
drivers/scsi/lpfc/lpfc_scsi.c
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@ -3257,7 +3257,7 @@ lpfc_scsi_prep_dma_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *lpfc_cmd)
*/
nseg = scsi_dma_map(scsi_cmnd);
if (unlikely(!nseg))
if (unlikely(nseg <= 0))
return 1;
sgl += 1;
/* clear the last flag in the fcp_rsp map entry */