diff options
| author | Douglas Anderson <dianders@chromium.org> | 2017-04-14 09:40:31 -0700 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-04-14 18:11:37 +0100 |
| commit | 0a78b248c3324fbbba49f74e2c93e0f436583788 (patch) | |
| tree | 90310071ac5889c401d7cf5b922aa44ba8f029c0 /sound/soc/codecs/rt5514.c | |
| parent | d0c02e14e48be94dd312ff6edffab9f9e6acd480 (diff) | |
| download | linux-0a78b248c3324fbbba49f74e2c93e0f436583788.tar.bz2 | |
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 <dianders@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/codecs/rt5514.c')
| -rw-r--r-- | sound/soc/codecs/rt5514.c | 6 |
1 files changed, 3 insertions, 3 deletions
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; |