This is a note to let you know that I've just added the patch titled
ASoC: mediatek: mt8195-afe-pcm: Convert to platform remove callback returning void
to the 5.15-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-mediatek-mt8195-afe-pcm-convert-to-platform-rem.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 0319d75a6aa4b9c01fff57c4b09ce8db14e79d6f
Author: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Date: Wed Mar 15 16:06:45 2023 +0100
ASoC: mediatek: mt8195-afe-pcm: Convert to platform remove callback returning void
[ Upstream commit 6461fee68064ba970e3ba90241fe5f5e038aa9d4 ]
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.
Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Acked-by: Takashi Iwai <tiwai@xxxxxxx>
Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230315150745.67084-114-u.kleine-koenig@xxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Stable-dep-of: dc93f0dcb436 ("ASoC: mediatek: mt8195: fix use-after-free in driver remove path")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c b/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c
index 2edb40fe27ccb..6c15d45f4a006 100644
--- a/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c
+++ b/sound/soc/mediatek/mt8195/mt8195-afe-pcm.c
@@ -3237,7 +3237,7 @@ static int mt8195_afe_pcm_dev_probe(struct platform_device *pdev)
return ret;
}
-static int mt8195_afe_pcm_dev_remove(struct platform_device *pdev)
+static void mt8195_afe_pcm_dev_remove(struct platform_device *pdev)
{
struct mtk_base_afe *afe = platform_get_drvdata(pdev);
@@ -3248,7 +3248,6 @@ static int mt8195_afe_pcm_dev_remove(struct platform_device *pdev)
mt8195_afe_runtime_suspend(&pdev->dev);
mt8195_afe_deinit_clock(afe);
- return 0;
}
static const struct of_device_id mt8195_afe_pcm_dt_match[] = {
@@ -3271,7 +3270,7 @@ static struct platform_driver mt8195_afe_pcm_driver = {
#endif
},
.probe = mt8195_afe_pcm_dev_probe,
- .remove = mt8195_afe_pcm_dev_remove,
+ .remove_new = mt8195_afe_pcm_dev_remove,
};
module_platform_driver(mt8195_afe_pcm_driver);
