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Subject[PATCH 4/12] wm8523: fix resource reclaim in wm8523_register error path
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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>
---
sound/soc/codecs/wm8523.c | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/sound/soc/codecs/wm8523.c b/sound/soc/codecs/wm8523.c
index 37242a7..0ad039b 100644
--- 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:
--
1.5.4.3




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