From 0a78b248c3324fbbba49f74e2c93e0f436583788 Mon Sep 17 00:00:00 2001 From: Douglas Anderson Date: Fri, 14 Apr 2017 09:40:31 -0700 Subject: ASoC: rt5514: Avoid relying on uninitialized "val" value In rt5514_i2c_probe() if the regmap_read(RT5514_VENDOR_ID2) fails then "val" may be left as uninitialized. Current code relies on "val" not being RT5514_DEVICE_ID, but that's potentially unsafe. Let's check for errors from regmap_read() and also explicitly init the value do we're not passing a possibly uninitialized int to printk. Signed-off-by: Douglas Anderson Signed-off-by: Mark Brown --- sound/soc/codecs/rt5514.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'sound/soc/codecs/rt5514.c') diff --git a/sound/soc/codecs/rt5514.c b/sound/soc/codecs/rt5514.c index 481e77763fe4..969a05620e04 100644 --- a/sound/soc/codecs/rt5514.c +++ b/sound/soc/codecs/rt5514.c @@ -1090,7 +1090,7 @@ static int rt5514_i2c_probe(struct i2c_client *i2c, struct rt5514_platform_data *pdata = dev_get_platdata(&i2c->dev); struct rt5514_priv *rt5514; int ret; - unsigned int val; + unsigned int val = ~0; rt5514 = devm_kzalloc(&i2c->dev, sizeof(struct rt5514_priv), GFP_KERNEL); @@ -1120,8 +1120,8 @@ static int rt5514_i2c_probe(struct i2c_client *i2c, return ret; } - regmap_read(rt5514->regmap, RT5514_VENDOR_ID2, &val); - if (val != RT5514_DEVICE_ID) { + ret = regmap_read(rt5514->regmap, RT5514_VENDOR_ID2, &val); + if (ret || val != RT5514_DEVICE_ID) { dev_err(&i2c->dev, "Device with ID register %x is not rt5514\n", val); return -ENODEV; -- cgit v1.2.3