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ASoC: atmel: mchp-pdmc: Skip ALSA restoration if substream runtime is uninitialized 

[ Upstream commit 09cfc6a532d249a51d3af5022d37ebbe9c3d31f6 ]

Update the driver to prevent alsa-restore.service from failing when
reading data from /var/lib/alsa/asound.state at boot. Ensure that the
restoration of ALSA mixer configurations is skipped if substream->runtime
is NULL.

Fixes: 50291652af ("ASoC: atmel: mchp-pdmc: add PDMC driver")
Signed-off-by: Andrei Simion <andrei.simion@microchip.com>
Link: https://patch.msgid.link/20240924081237.50046-1-andrei.simion@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Andrei Simion 2024-09-24 11:12:38 +03:00 committed by Greg Kroah-Hartman
parent 28234f8ab6
commit 0152c81f61
1 changed files with 3 additions and 0 deletions
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3
sound/soc/atmel/mchp-pdmc.c
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@ -285,6 +285,9 @@ static int mchp_pdmc_chmap_ctl_put(struct snd_kcontrol *kcontrol,
if (!substream)
return -ENODEV;
if (!substream->runtime)
return 0; /* just for avoiding error from alsactl restore */
map = mchp_pdmc_chmap_get(substream, info);
if (!map)
return -EINVAL;