[PATCH 3.10 56/85] ASoC: pcm: free path list before exiting from error conditions

Greg Kroah-Hartman
2014-03-21T00:09:08Z

From: Patrick Lai <plai@codeaurora.org>

commit e4ad1accb28d0ed8cea6f12395d58686ad344ca7 upstream.

dpcm_path_get() allocates dynamic memory to hold path list.
Corresponding dpcm_path_put() must be called to free the memory.
dpcm_path_put() is not called under several error conditions.
This leads to memory leak.

Signed-off-by: Patrick Lai <plai@codeaurora.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
sound/soc/soc-pcm.c | 3 +++
1 file changed, 3 insertions(+)

--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1864,6 +1864,7 @@ int soc_dpcm_runtime_update(struct snd_s

paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_PLAYBACK, &list);
if (paths < 0) {
+ dpcm_path_put(&list);
dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
fe->dai_link->name, "playback");
mutex_unlock(&card->mutex);
@@ -1893,6 +1894,7 @@ capture:

paths = dpcm_path_get(fe, SNDRV_PCM_STREAM_CAPTURE, &list);
if (paths < 0) {
+ dpcm_path_put(&list);
dev_warn(fe->dev, "ASoC: %s no valid %s path\n",
fe->dai_link->name, "capture");
mutex_unlock(&card->mutex);
@@ -1957,6 +1959,7 @@ static int dpcm_fe_dai_open(struct snd_p
fe->dpcm[stream].runtime = fe_substream->runtime;

if (dpcm_path_get(fe, stream, &list) <= 0) {
+ dpcm_path_put(&list);
dev_dbg(fe->dev, "ASoC: %s no valid %s route\n",
fe->dai_link->name, stream ? "capture" : "playback");
}