scsi: lpfc: Use correct scnprintf() limit

[ Upstream commit 6dacc371b77f473770ec646e220303a84fe96c11 ]

The limit should be "PAGE_SIZE - len" instead of "PAGE_SIZE".  We're not
going to hit the limit so this fix will not affect runtime.

Link: https://lore.kernel.org/r/20210916132331.GE25094@kili
Fixes: 5b9e70b22cc5 ("scsi: lpfc: raise sg count for nvme to use available sg resources")
Reviewed-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index 45db19e31b348da15cec65032a1767648442ae62..f0ecfe565660ab619f212476f77e87b25a678c29 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -5881,7 +5881,8 @@ lpfc_sg_seg_cnt_show(struct device *dev, struct device_attribute *attr,
        len = scnprintf(buf, PAGE_SIZE, "SGL sz: %d  total SGEs: %d\n",
                       phba->cfg_sg_dma_buf_size, phba->cfg_total_seg_cnt);
 
-       len += scnprintf(buf + len, PAGE_SIZE, "Cfg: %d  SCSI: %d  NVME: %d\n",
+       len += scnprintf(buf + len, PAGE_SIZE - len,
+                       "Cfg: %d  SCSI: %d  NVME: %d\n",
                        phba->cfg_sg_seg_cnt, phba->cfg_scsi_seg_cnt,
                        phba->cfg_nvme_seg_cnt);
        return len;