From: =?UTF-8?q?Martin=20Povi=C5=A1er?= <povik+lin@cutebit.org>
Date: Fri, 24 Feb 2023 16:33:02 +0100
Subject: [PATCH] ASoC: apple: mca: Improve handling of unavailable DMA
channels
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References: bsc#1012628
Patch-mainline: 6.2.5
Git-commit: fb1847cc460c127b12720119eae5f438ffc62e85
[ Upstream commit fb1847cc460c127b12720119eae5f438ffc62e85 ]
When we fail to obtain a DMA channel, don't return a blanket -EINVAL,
instead return the original error code if there's one. This makes
deferring work as it should. Also don't print an error message for
-EPROBE_DEFER.
Fixes: 4ec8179c212f ("ASoC: apple: mca: Postpone requesting of DMA channels")
Signed-off-by: Martin PoviĊĦer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20230224153302.45365-3-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
sound/soc/apple/mca.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/sound/soc/apple/mca.c b/sound/soc/apple/mca.c
index aea08c7b..64750db9 100644
--- a/sound/soc/apple/mca.c
+++ b/sound/soc/apple/mca.c
@@ -950,10 +950,17 @@ static int mca_pcm_new(struct snd_soc_component *component,
chan = mca_request_dma_channel(cl, i);
if (IS_ERR_OR_NULL(chan)) {
+ mca_pcm_free(component, rtd->pcm);
+
+ if (chan && PTR_ERR(chan) == -EPROBE_DEFER)
+ return PTR_ERR(chan);
+
dev_err(component->dev, "unable to obtain DMA channel (stream %d cluster %d): %pe\n",
i, cl->no, chan);
- mca_pcm_free(component, rtd->pcm);
- return -EINVAL;
+
+ if (!chan)
+ return -EINVAL;
+ return PTR_ERR(chan);
}
cl->dma_chans[i] = chan;
--
2.35.3