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ASoC: SOF: ipc4-pcm: fix possible null pointer deference
[ Upstream commit 2d218b4 ] The call to snd_sof_find_spcm_dai() could return NULL, add nullable check for the return value to avoid null pointer defenrece. Fixes: 7cb1900 ("ASoC: SOF: ipc4-pcm: add hw_params") Signed-off-by: Chao Song <chao.song@linux.intel.com> Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Link: https://lore.kernel.org/r/20230816133311.7523-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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