linux-kernel - [PATCH] hwmon: replace snprintf in show functions with sysfs

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Message-Id: <1634280525-4532-1-git-send-email-wangqing@vivo.com>
Date:   Thu, 14 Oct 2021 23:48:45 -0700
From:   Qing Wang <wangqing@...o.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Jean Delvare <jdelvare@...e.com>, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Qing Wang <wangqing@...o.com>
Subject: [PATCH] hwmon: replace snprintf in show functions with sysfs_emit

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

Fix the following coccicheck warning:
drivers/hwmon/smm665.c:378: WARNING: use scnprintf or sprintf.

Use sysfs_emit instead of scnprintf or sprintf makes more sense.

Signed-off-by: Qing Wang <wangqing@...o.com>
---
 drivers/hwmon/smm665.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/smm665.c b/drivers/hwmon/smm665.c
index 62906d9..122031e 100644
--- a/drivers/hwmon/smm665.c
+++ b/drivers/hwmon/smm665.c
@@ -375,7 +375,7 @@ static ssize_t smm665_show_##what(struct device *dev, \
 { \
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(da); \
 	const int val = smm665_get_##what(dev, attr->index); \
-	return snprintf(buf, PAGE_SIZE, "%d\n", val); \
+	return sysfs_emit(buf, "%d\n", val); \
 }
 
 SMM665_SHOW(min);
-- 
2.7.4