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From: Qing Wang <wangqing@vivo.com>
To: Wolfgang Grandegger <wg@grandegger.com>,
	Marc Kleine-Budde <mkl@pengutronix.de>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Nicolas Ferre <nicolas.ferre@microchip.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Ludovic Desroches <ludovic.desroches@microchip.com>,
	linux-can@vger.kernel.org, netdev@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Qing Wang <wangqing@vivo.com>
Subject: [PATCH] net: can: replace snprintf in show functions with sysfs_emit
Date: Thu, 14 Oct 2021 23:50:24 -0700	[thread overview]
Message-ID: <1634280624-4816-1-git-send-email-wangqing@vivo.com> (raw)

show() must not use snprintf() when formatting the value to be
returned to user space.

Fix the following coccicheck warning:
drivers/net/can/at91_can.c:1185: WARNING: use scnprintf or sprintf.
drivers/net/can/janz-ican3.c:1834: WARNING: use scnprintf or sprintf.

Use sysfs_emit instead of scnprintf or sprintf makes more sense.

Signed-off-by: Qing Wang <wangqing@vivo.com>
---
 drivers/net/can/at91_can.c   | 4 ++--
 drivers/net/can/janz-ican3.c | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
index 04d0bb3..e4e754e 100644
--- a/drivers/net/can/at91_can.c
+++ b/drivers/net/can/at91_can.c
@@ -1182,9 +1182,9 @@ static ssize_t at91_sysfs_show_mb0_id(struct device *dev,
 	struct at91_priv *priv = netdev_priv(to_net_dev(dev));
 
 	if (priv->mb0_id & CAN_EFF_FLAG)
-		return snprintf(buf, PAGE_SIZE, "0x%08x\n", priv->mb0_id);
+		return sysfs_emit(buf, "0x%08x\n", priv->mb0_id);
 	else
-		return snprintf(buf, PAGE_SIZE, "0x%03x\n", priv->mb0_id);
+		return sysfs_emit(buf, "0x%03x\n", priv->mb0_id);
 }
 
 static ssize_t at91_sysfs_set_mb0_id(struct device *dev,
diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c
index 2a6c918..feedc13 100644
--- a/drivers/net/can/janz-ican3.c
+++ b/drivers/net/can/janz-ican3.c
@@ -1831,7 +1831,7 @@ static ssize_t ican3_sysfs_show_term(struct device *dev,
 		return -ETIMEDOUT;
 	}
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", mod->termination_enabled);
+	return sysfs_emit(buf, "%u\n", mod->termination_enabled);
 }
 
 static ssize_t ican3_sysfs_set_term(struct device *dev,
-- 
2.7.4


WARNING: multiple messages have this Message-ID (diff)
From: Qing Wang <wangqing@vivo.com>
To: Wolfgang Grandegger <wg@grandegger.com>,
	Marc Kleine-Budde <mkl@pengutronix.de>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Nicolas Ferre <nicolas.ferre@microchip.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Ludovic Desroches <ludovic.desroches@microchip.com>,
	linux-can@vger.kernel.org, netdev@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Qing Wang <wangqing@vivo.com>
Subject: [PATCH] net: can: replace snprintf in show functions with sysfs_emit
Date: Thu, 14 Oct 2021 23:50:24 -0700	[thread overview]
Message-ID: <1634280624-4816-1-git-send-email-wangqing@vivo.com> (raw)

show() must not use snprintf() when formatting the value to be
returned to user space.

Fix the following coccicheck warning:
drivers/net/can/at91_can.c:1185: WARNING: use scnprintf or sprintf.
drivers/net/can/janz-ican3.c:1834: WARNING: use scnprintf or sprintf.

Use sysfs_emit instead of scnprintf or sprintf makes more sense.

Signed-off-by: Qing Wang <wangqing@vivo.com>
---
 drivers/net/can/at91_can.c   | 4 ++--
 drivers/net/can/janz-ican3.c | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
index 04d0bb3..e4e754e 100644
--- a/drivers/net/can/at91_can.c
+++ b/drivers/net/can/at91_can.c
@@ -1182,9 +1182,9 @@ static ssize_t at91_sysfs_show_mb0_id(struct device *dev,
 	struct at91_priv *priv = netdev_priv(to_net_dev(dev));
 
 	if (priv->mb0_id & CAN_EFF_FLAG)
-		return snprintf(buf, PAGE_SIZE, "0x%08x\n", priv->mb0_id);
+		return sysfs_emit(buf, "0x%08x\n", priv->mb0_id);
 	else
-		return snprintf(buf, PAGE_SIZE, "0x%03x\n", priv->mb0_id);
+		return sysfs_emit(buf, "0x%03x\n", priv->mb0_id);
 }
 
 static ssize_t at91_sysfs_set_mb0_id(struct device *dev,
diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c
index 2a6c918..feedc13 100644
--- a/drivers/net/can/janz-ican3.c
+++ b/drivers/net/can/janz-ican3.c
@@ -1831,7 +1831,7 @@ static ssize_t ican3_sysfs_show_term(struct device *dev,
 		return -ETIMEDOUT;
 	}
 
-	return snprintf(buf, PAGE_SIZE, "%u\n", mod->termination_enabled);
+	return sysfs_emit(buf, "%u\n", mod->termination_enabled);
 }
 
 static ssize_t ican3_sysfs_set_term(struct device *dev,
-- 
2.7.4


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             reply	other threads:[~2021-10-15  6:50 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-15  6:50 Qing Wang [this message]
2021-10-15  6:50 ` [PATCH] net: can: replace snprintf in show functions with sysfs_emit Qing Wang
2021-10-17 10:18 ` Marc Kleine-Budde
2021-10-17 10:18   ` Marc Kleine-Budde

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