[PATCH v2 11/12] wm8978: fix a memory leak if another WM8978 is registered
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From: Axel Lin on 15 Jul 2010 04:40 >From e53ff15ee6843d6591509f9aeeb2fa1a0c1eccee Mon Sep 17 00:00:00 2001 From: Axel Lin <axel.lin(a)gmail.com> Date: Thu, 15 Jul 2010 16:33:20 +0800 Subject: [PATCH] wm8978: fix a memory leak if a wm8978_register fail There is a memory leak found if wm8978_register() fail. This patch moves the buffer allocate and release at the same level to prevent the memory leak. Signed-off-by: Axel Lin <axel.lin(a)gmail.com> --- sound/soc/codecs/wm8978.c | 10 +++++++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/sound/soc/codecs/wm8978.c b/sound/soc/codecs/wm8978.c index 51d5f43..8a1ad77 100644 --- a/sound/soc/codecs/wm8978.c +++ b/sound/soc/codecs/wm8978.c @@ -1076,7 +1076,6 @@ static __devinit int wm8978_register(struct wm8978_priv *wm8978) err_codec: snd_soc_unregister_codec(codec); err: - kfree(wm8978); return ret; } @@ -1085,13 +1084,13 @@ static __devexit void wm8978_unregister(struct wm8978_priv *wm8978) wm8978_set_bias_level(&wm8978->codec, SND_SOC_BIAS_OFF); snd_soc_unregister_dai(&wm8978_dai); snd_soc_unregister_codec(&wm8978->codec); - kfree(wm8978); wm8978_codec = NULL; } static __devinit int wm8978_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { + int ret; struct wm8978_priv *wm8978; struct snd_soc_codec *codec; @@ -1107,13 +1106,18 @@ static __devinit int wm8978_i2c_probe(struct i2c_client *i2c, codec->dev = &i2c->dev; - return wm8978_register(wm8978); + ret = wm8978_register(wm8978); + if (ret < 0) + kfree(wm8978); + + return ret; } static __devexit int wm8978_i2c_remove(struct i2c_client *client) { struct wm8978_priv *wm8978 = i2c_get_clientdata(client); wm8978_unregister(wm8978); + kfree(wm8978); return 0; } -- 1.5.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |