ASoC: wm8523: fix resource reclaim in wm8523_register error path

This patch includes below fixes:
1. If another WM8523 is registered, need to kfree wm8523 before return -EINVAL.
2. If snd_soc_register_codec failed, goto error path to properly free resources.
3. Instead of using mixed in-line and goto style cleanup, use goto style error
   handling if snd_soc_register_dai failed.

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/wm8523.c b/sound/soc/codecs/wm8523.c
index 37242a7d307751d9876acee1c4e955e3029262b7..0ad039b4adf5fd0b12e587a115f91196e921b331 100644 (file)
--- a/sound/soc/codecs/wm8523.c
+++ b/sound/soc/codecs/wm8523.c
@@ -482,7 +482,8 @@ static int wm8523_register(struct wm8523_priv *wm8523,
 
        if (wm8523_codec) {
                dev_err(codec->dev, "Another WM8523 is registered\n");
-               return -EINVAL;
+               ret = -EINVAL;
+               goto err;
        }
 
        mutex_init(&codec->mutex);
@@ -570,18 +571,19 @@ static int wm8523_register(struct wm8523_priv *wm8523,
        ret = snd_soc_register_codec(codec);
        if (ret != 0) {
                dev_err(codec->dev, "Failed to register codec: %d\n", ret);
-               return ret;
+               goto err_enable;
        }
 
        ret = snd_soc_register_dai(&wm8523_dai);
        if (ret != 0) {
                dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
-               snd_soc_unregister_codec(codec);
-               return ret;
+               goto err_codec;
        }
 
        return 0;
 
+err_codec:
+       snd_soc_unregister_codec(codec);
 err_enable:
        regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
 err_get: