linux-kernel - [patch] regulator: lp3972: Silence uninitialized variable warning

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Message-ID: <20160414093407.GE16549@mwanda>
Date:	Thu, 14 Apr 2016 12:34:07 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Liam Girdwood <lgirdwood@...il.com>
Cc:	Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] regulator: lp3972: Silence uninitialized variable warning

This is harmless but my static checker complains that "tmp" is
uninitialized if lp3972_i2c_read() fails.  I have moved the line of code
below the error handling to silence the warning.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/regulator/lp3972.c b/drivers/regulator/lp3972.c
index 3a7e96e..ff0c275 100644
--- a/drivers/regulator/lp3972.c
+++ b/drivers/regulator/lp3972.c
@@ -211,8 +211,8 @@ static int lp3972_set_bits(struct lp3972 *lp3972, u8 reg, u16 mask, u16 val)
 	mutex_lock(&lp3972->io_lock);
 
 	ret = lp3972_i2c_read(lp3972->i2c, reg, 1, &tmp);
-	tmp = (tmp & ~mask) | val;
 	if (ret == 0) {
+		tmp = (tmp & ~mask) | val;
 		ret = lp3972_i2c_write(lp3972->i2c, reg, 1, &tmp);
 		dev_dbg(lp3972->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg,
 			(unsigned)val & 0xff);