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ASoC: dmaengine: do not use a NULL prepare_slave_config() callback

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[ Upstream commit 9a1e13440a4f2e7566fd4c5eae6a53e6400e08a4 ]

Even if struct snd_dmaengine_pcm_config is used, prepare_slave_config()
callback might not be set. Check if this callback is set before using it.

Fixes: fa654e0853 ("ASoC: dmaengine-pcm: Provide default config")
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20220307122202.2251639-2-codrin.ciubotariu@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Codrin Ciubotariu 2022-03-07 14:21:57 +02:00 committed by Greg Kroah-Hartman
parent f452cff025
commit c8c981cfc0
1 changed files with 3 additions and 3 deletions
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6
sound/soc/soc-generic-dmaengine-pcm.c
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@ -83,10 +83,10 @@ static int dmaengine_pcm_hw_params(struct snd_soc_component *component,
memset(&slave_config, 0, sizeof(slave_config));
if (!pcm->config)
prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
else
if (pcm->config && pcm->config->prepare_slave_config)
prepare_slave_config = pcm->config->prepare_slave_config;
else
prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
if (prepare_slave_config) {
ret = prepare_slave_config(substream, params, &slave_config);