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: 50291652af52 ("ASoC: atmel: mchp-pdmc: add PDMC driver")
Signed-off-by: Andrei Simion <andrei.simion@xxxxxxxxxxxxx>
---
sound/soc/atmel/mchp-pdmc.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/sound/soc/atmel/mchp-pdmc.c b/sound/soc/atmel/mchp-pdmc.c
index 939cd44ebc8a..06dc3c48e7e8 100644
--- a/sound/soc/atmel/mchp-pdmc.c
+++ b/sound/soc/atmel/mchp-pdmc.c
@@ -302,6 +302,9 @@ 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;
base-commit: 4d0326b60bb753627437fff0f76bf1525bcda422
--
2.34.1
