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From: Dan Carpenter <dan.carpenter@oracle.com>
To: James Smart <james.smart@broadcom.com>,
	Dick Kennedy <dick.kennedy@broadcom.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	linux-scsi@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH] scsi: lpfc: Fix a condition in lpfc_dmp_dbg()
Date: Thu, 09 Jul 2020 10:49:19 +0000	[thread overview]
Message-ID: <20200709104919.GD20875@mwanda> (raw)

These variables are unsigned so the result of the subtraction is also
unsigned and thus can't be negative.  Change it to a comparison and
remove the subtraction.

Fixes: 372c187b8a70 ("scsi: lpfc: Add an internal trace log buffer")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/scsi/lpfc/lpfc_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 7285b0114837..2bb2c96e7784 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -14152,7 +14152,7 @@ void lpfc_dmp_dbg(struct lpfc_hba *phba)
 		if ((start_idx + dbg_cnt) > (DBG_LOG_SZ - 1)) {
 			temp_idx = (start_idx + dbg_cnt) % DBG_LOG_SZ;
 		} else {
-			if ((start_idx - dbg_cnt) < 0) {
+			if (start_idx > dbg_cnt) {
 				start_idx = DBG_LOG_SZ - (dbg_cnt - start_idx);
 				temp_idx = 0;
 			} else {
-- 
2.27.0

WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: James Smart <james.smart@broadcom.com>,
	Dick Kennedy <dick.kennedy@broadcom.com>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>,
	linux-scsi@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH] scsi: lpfc: Fix a condition in lpfc_dmp_dbg()
Date: Thu, 9 Jul 2020 13:49:19 +0300	[thread overview]
Message-ID: <20200709104919.GD20875@mwanda> (raw)

These variables are unsigned so the result of the subtraction is also
unsigned and thus can't be negative.  Change it to a comparison and
remove the subtraction.

Fixes: 372c187b8a70 ("scsi: lpfc: Add an internal trace log buffer")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 drivers/scsi/lpfc/lpfc_init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 7285b0114837..2bb2c96e7784 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -14152,7 +14152,7 @@ void lpfc_dmp_dbg(struct lpfc_hba *phba)
 		if ((start_idx + dbg_cnt) > (DBG_LOG_SZ - 1)) {
 			temp_idx = (start_idx + dbg_cnt) % DBG_LOG_SZ;
 		} else {
-			if ((start_idx - dbg_cnt) < 0) {
+			if (start_idx > dbg_cnt) {
 				start_idx = DBG_LOG_SZ - (dbg_cnt - start_idx);
 				temp_idx = 0;
 			} else {
-- 
2.27.0


             reply	other threads:[~2020-07-09 10:49 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-09 10:49 Dan Carpenter [this message]
2020-07-09 10:49 ` [PATCH] scsi: lpfc: Fix a condition in lpfc_dmp_dbg() Dan Carpenter
2020-07-09 10:56 ` Dan Carpenter
2020-07-09 10:56   ` Dan Carpenter
2020-07-09 10:58   ` [PATCH v2] " Dan Carpenter
2020-07-09 10:58     ` Dan Carpenter
2020-07-09 14:43     ` James Smart
2020-07-09 14:43       ` James Smart

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