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* [PATCH] scsi: lpfc: use correct scnprintf() limit
@ 2021-09-16 13:23 Dan Carpenter
  2021-09-16 20:22 ` James Smart
  2021-09-22  4:44 ` Martin K. Petersen
  0 siblings, 2 replies; 3+ messages in thread
From: Dan Carpenter @ 2021-09-16 13:23 UTC (permalink / raw)
  To: James Smart
  Cc: Dick Kennedy, James E.J. Bottomley, Martin K. Petersen,
	linux-scsi, kernel-janitors

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.

Fixes: 5b9e70b22cc5 ("scsi: lpfc: raise sg count for nvme to use available sg resources")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/scsi/lpfc/lpfc_attr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index b35bf70a8c0d..1e5a30eb04de 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -6204,7 +6204,8 @@ 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;
-- 
2.20.1


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2021-09-16 13:23 [PATCH] scsi: lpfc: use correct scnprintf() limit Dan Carpenter
2021-09-16 20:22 ` James Smart
2021-09-22  4:44 ` Martin K. Petersen

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