ASoC: wm8940: fix a memory leak if wm8940_register return error

This patch adds checking for wm8940_register return value,
and does kfree(wm8940) if wm8940_register() fail.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/sound/soc/codecs/wm8940.c b/sound/soc/codecs/wm8940.c
index e3c4bbfaae273db4502dfaa58c2e29971271e3f3..f0c11138e61002cf2c6a0f419c64de177f0e9a62 100644 (file)
--- a/sound/soc/codecs/wm8940.c
+++ b/sound/soc/codecs/wm8940.c
@@ -845,6 +845,7 @@ static void wm8940_unregister(struct wm8940_priv *wm8940)
 static int wm8940_i2c_probe(struct i2c_client *i2c,
                            const struct i2c_device_id *id)
 {
+       int ret;
        struct wm8940_priv *wm8940;
        struct snd_soc_codec *codec;
 
@@ -858,7 +859,11 @@ static int wm8940_i2c_probe(struct i2c_client *i2c,
        codec->control_data = i2c;
        codec->dev = &i2c->dev;
 
-       return wm8940_register(wm8940, SND_SOC_I2C);
+       ret = wm8940_register(wm8940, SND_SOC_I2C);
+       if (ret < 0)
+               kfree(wm8940);
+
+       return ret;
 }
 
 static int __devexit wm8940_i2c_remove(struct i2c_client *client)