linux-kernel - [PATCH] hwmon/applesmc: Fix uninitialized variables warnings

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Message-Id: <1446763167-7716-1-git-send-email-shuahkh@osg.samsung.com>
Date:	Thu,  5 Nov 2015 15:39:27 -0700
From:	Shuah Khan <shuahkh@....samsung.com>
To:	rydberg@...math.org, jdelvare@...e.de, linux@...ck-us.net
Cc:	Shuah Khan <shuahkh@....samsung.com>, lm-sensors@...sensors.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] hwmon/applesmc: Fix uninitialized variables warnings

Fix the following "maybe used uninitialized" warnings by
initializing the variables to keep the compiler quiet.
There is no "used uninitialized" in this case.

  CC [M]  drivers/hwmon/applesmc.o
drivers/hwmon/applesmc.c: In function ‘applesmc_init_smcreg’:
drivers/hwmon/applesmc.c:595:43: warning: ‘right_light_sensor’
may be used uninitialized in this function [-Wmaybe-uninitialized]
  s->num_light_sensors = left_light_sensor + right_light_sensor;
                                           ^
drivers/hwmon/applesmc.c:540:26: note: ‘right_light_sensor’ was
declared here
  bool left_light_sensor, right_light_sensor;
                          ^
drivers/hwmon/applesmc.c:595:43: warning: ‘left_light_sensor’ may
be used uninitialized in this function [-Wmaybe-uninitialized]
  s->num_light_sensors = left_light_sensor + right_light_sensor;
                                           ^
drivers/hwmon/applesmc.c:540:7: note: ‘left_light_sensor’ was
declared here
  bool left_light_sensor, right_light_sensor;
       ^

Signed-off-by: Shuah Khan <shuahkh@....samsung.com>
---
 drivers/hwmon/applesmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
index 0af63da..a0d1fd4 100644
--- a/drivers/hwmon/applesmc.c
+++ b/drivers/hwmon/applesmc.c
@@ -537,7 +537,7 @@ static int applesmc_init_index(struct applesmc_registers *s)
 static int applesmc_init_smcreg_try(void)
 {
 	struct applesmc_registers *s = &smcreg;
-	bool left_light_sensor, right_light_sensor;
+	bool left_light_sensor = 0, right_light_sensor = 0;
 	unsigned int count;
 	u8 tmp[1];
 	int ret;
-- 
2.5.0

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