This is a note to let you know that I've just added the patch titled
ASoC: Intel: bytcr_rt5651: Drop reference count of ACPI device after use
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
asoc-intel-bytcr_rt5651-drop-reference-count-of-acpi.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1496556315320f59ff3c3fa718cc28e4dbcde478
Author: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Date: Thu Jan 12 13:28:49 2023 +0200
ASoC: Intel: bytcr_rt5651: Drop reference count of ACPI device after use
[ Upstream commit 721858823d7cdc8f2a897579b040e935989f6f02 ]
Theoretically the device might gone if its reference count drops to 0.
This might be the case when we try to find the first physical node of
the ACPI device. We need to keep reference to it until we get a result
of the above mentioned call. Refactor the code to drop the reference
count at the correct place.
While at it, move to acpi_dev_put() as symmetrical call to the
acpi_dev_get_first_match_dev().
Fixes: 02c0a3b3047f ("ASoC: Intel: bytcr_rt5651: add MCLK, quirks and cleanups")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230112112852.67714-3-andriy.shevchenko@xxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/sound/soc/intel/boards/bytcr_rt5651.c b/sound/soc/intel/boards/bytcr_rt5651.c
index 472f6e3327960..a8289f74463e9 100644
--- a/sound/soc/intel/boards/bytcr_rt5651.c
+++ b/sound/soc/intel/boards/bytcr_rt5651.c
@@ -919,7 +919,6 @@ static int snd_byt_rt5651_mc_probe(struct platform_device *pdev)
if (adev) {
snprintf(byt_rt5651_codec_name, sizeof(byt_rt5651_codec_name),
"i2c-%s", acpi_dev_name(adev));
- put_device(&adev->dev);
byt_rt5651_dais[dai_index].codecs->name = byt_rt5651_codec_name;
} else {
dev_err(&pdev->dev, "Error cannot find '%s' dev\n", mach->id);
@@ -927,6 +926,7 @@ static int snd_byt_rt5651_mc_probe(struct platform_device *pdev)
}
codec_dev = acpi_get_first_physical_node(adev);
+ acpi_dev_put(adev);
if (!codec_dev)
return -EPROBE_DEFER;
priv->codec_dev = get_device(codec_dev);
