From: bui duc phuc <phucduc.bui@gmail.com>

The DMA channel request code currently warns about legacy DMA failures
when the channel name is not present in dma-names. This can report a
firmware lookup failure as a legacy DMA failure.

Furthermore, failures from the legacy DMA path are already reported by
find_candidate(), making these warnings redundant.

Only warn when the channel name is present in dma-names but the request
fails, avoiding misleading and duplicate error messages.

Fixes: 9167f260477b ("ASoC: soc-generic-dmaengine: Handle DMA channel request failures correctly")
Reported-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/all/aoyBuho270dTWYBL@jupiter.universe/
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---
 sound/soc/soc-generic-dmaengine-pcm.c | 20 ++------------------
 1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c
index 3b18d90e81c3..65b7ec52a054 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -397,24 +397,8 @@ static int dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,
 			if (PTR_ERR(chan) == -EPROBE_DEFER)
 				return -EPROBE_DEFER;
 
-			bool has_fw_node = dev->of_node || is_acpi_device_node(dev->fwnode);
-			bool name_exists_in_fw = false;
-
-			if (has_fw_node)
-				name_exists_in_fw = device_property_match_string(dev,
-										 "dma-names",
-										 name) >= 0;
-
-			if (has_fw_node && name_exists_in_fw)
-				dev_warn(dev, "DTS/ACPI DMA channel '%s' request failed (%ld)\n",
-					 name, PTR_ERR(chan));
-
-			if (has_fw_node && !name_exists_in_fw)
-				dev_warn(dev, "DTS/ACPI name '%s' not found, legacy failed (%ld)\n",
-					 name, PTR_ERR(chan));
-
-			if (!has_fw_node)
-				dev_warn(dev, "Legacy DMA channel '%s' request failed (%ld)\n",
+			if (device_property_match_string(dev, "dma-names", name) >= 0)
+				dev_warn(dev, "dma-names has '%s' but request failed (%ld)\n",
 					 name, PTR_ERR(chan));
 
 			pcm->chan[i] = NULL;
-- 
2.43.0

On Tue, 25 Aug 2026 15:19:49 +0700, phucduc.bui@gmail.com wrote:
> ASoC: soc-generic-dmaengine: Fix DMA channel request warning

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-7.3

Thanks!

[1/1] ASoC: soc-generic-dmaengine: Fix DMA channel request warning
      https://git.kernel.org/broonie/sound/c/84d2d96ac3f1

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

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Thanks,
Mark