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From: Guenter Roeck <linux@roeck-us.net>
To: Hardware Monitoring <linux-hwmon@vger.kernel.org>
Cc: Jean Delvare <jdelvare@suse.com>,
	Guenter Roeck <linux@roeck-us.net>, Lei YU <mine260309@gmail.com>
Subject: [PATCH] hwmon: (w83773g) Fix fault detection and reporting
Date: Sun,  3 Dec 2017 18:13:56 -0800
Message-ID: <1512353636-13985-1-git-send-email-linux@roeck-us.net> (raw)

Smatch reports:

drivers/hwmon/w83773g.c:105
	get_fault() warn: shift has higher precedence than mask

Code analysis shows that the code is indeed wrong.
Fix it, and while we are at it, drop unnecessary typecast.

Fixes: 86a10c802362 ("hwmon: Add W83773G driver")
Cc: Lei YU <mine260309@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/hwmon/w83773g.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/w83773g.c b/drivers/hwmon/w83773g.c
index 0b97c285b049..e858093ac806 100644
--- a/drivers/hwmon/w83773g.c
+++ b/drivers/hwmon/w83773g.c
@@ -102,7 +102,7 @@ static int get_fault(struct regmap *regmap, int index, long *val)
 	if (ret < 0)
 		return ret;
 
-	*val = (u8)regval & 0x04 >> 2;
+	*val = (regval & 0x04) >> 2;
 	return 0;
 }
 
-- 
2.7.4


             reply index

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-04  2:13 Guenter Roeck [this message]
2017-12-04  4:23 ` Lei YU

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