ASoC: pcm: free path list before exiting from error conditions

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>
Cc: stable@vger.kernel.org

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 47e1ce7..28522bd 100644 (file)
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -1989,6 +1989,7 @@ int soc_dpcm_runtime_update(struct snd_soc_card *card)
 
                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);
@@ -2018,6 +2019,7 @@ 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);
@@ -2082,6 +2084,7 @@ static int dpcm_fe_dai_open(struct snd_pcm_substream *fe_substream)
        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");
        }