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ASoC: SOF: ipc: Add null pointer check for substream->runtime

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When pcm stream is stopped "substream->runtime" pointer will be set
to NULL by ALSA core. In case host received an ipc msg from firmware
of type IPC_STREAM_POSITION after pcm stream is stopped, there will
be kernel NULL pointer exception in ipc_period_elapsed(). This patch
fixes it by adding NULL pointer check for "substream->runtime".

Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20211216232422.345164-3-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ajit Kumar Pandey 2021-12-16 17:24:21 -06:00 committed by Mark Brown
parent cb515f105c
commit 182b682b9a
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GPG Key ID: 24D68B725D5487D0
1 changed files with 2 additions and 1 deletions
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3
sound/soc/sof/ipc.c
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@ -623,7 +623,8 @@ static void ipc_period_elapsed(struct snd_sof_dev *sdev, u32 msg_id)
if (spcm->pcm.compress)
snd_sof_compr_fragment_elapsed(stream->cstream);
else if (!stream->substream->runtime->no_period_wakeup)
else if (stream->substream->runtime &&
!stream->substream->runtime->no_period_wakeup)
/* only inform ALSA for period_wakeup mode */
snd_sof_pcm_period_elapsed(stream->substream);
}