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ASoC: hdac_hdmi: Fix possible memory leak in hw_params 

It's possible for hw_params to be called two times. So add NULL
check to prevent memory leak.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Subhransu S. Prusty 2016-02-17 21:33:59 +05:30 committed by Mark Brown
parent cd890ade49
commit 6793a3d706
1 changed files with 11 additions and 5 deletions
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16
sound/soc/codecs/hdac_hdmi.c
View File

@ -405,9 +405,13 @@ static int hdac_hdmi_set_hw_params(struct snd_pcm_substream *substream,
return -ENODEV;
}
dd = kzalloc(sizeof(*dd), GFP_KERNEL);
if (!dd)
return -ENOMEM;
dd = snd_soc_dai_get_dma_data(dai, substream);
if (!dd) {
dd = kzalloc(sizeof(*dd), GFP_KERNEL);
if (!dd)
return -ENOMEM;
}
dd->format = snd_hdac_calc_stream_format(params_rate(hparams),
params_channels(hparams), params_format(hparams),
24, 0);
@ -433,9 +437,11 @@ static int hdac_hdmi_playback_cleanup(struct snd_pcm_substream *substream,
AC_VERB_SET_STREAM_FORMAT, 0);
dd = (struct hdac_ext_dma_params *)snd_soc_dai_get_dma_data(dai, substream);
snd_soc_dai_set_dma_data(dai, substream, NULL);
kfree(dd);
if (dd) {
snd_soc_dai_set_dma_data(dai, substream, NULL);
kfree(dd);
}
return 0;
}