The patch
ASoC: kirkwood: fix device remove ordering
has been applied to the asoc tree at
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.4
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.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From dc39596a906d5b604f4e64597b6e904fc14625e8 Mon Sep 17 00:00:00 2001
From: Russell King rmk+kernel@armlinux.org.uk Date: Wed, 23 Oct 2019 14:46:49 +0100 Subject: [PATCH] ASoC: kirkwood: fix device remove ordering
The devm conversion of kirkwood was incorrect; on removal, devm takes effect after the "remove" function has returned. So, the effect of the conversion was to change the order during remove from:
- snd_soc_unregister_component() (unpublishes interfaces) - clk_disable_unprepare() - cleanup resources
After the conversion, this became:
- clk_disable_unprepare() - while the device may still be active - snd_soc_unregister_component() - cleanup resources
Hence, it introduces a bug, where the internal clock for the device may be shut down before the device itself has been shut down. It is known that Marvell SoCs, including Dove, locks up if registers for a peripheral that has its clocks disabled are accessed.
Fixes: f98fc0f8154e ("ASoC: kirkwood: replace platform to component") Signed-off-by: Russell King rmk+kernel@armlinux.org.uk Link: https://lore.kernel.org/r/E1iNGyP-0004oN-BA@rmk-PC.armlinux.org.uk Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/kirkwood/kirkwood-i2s.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/soc/kirkwood/kirkwood-i2s.c b/sound/soc/kirkwood/kirkwood-i2s.c index 9575a636d016..2a4ffe945177 100644 --- a/sound/soc/kirkwood/kirkwood-i2s.c +++ b/sound/soc/kirkwood/kirkwood-i2s.c @@ -587,7 +587,7 @@ static int kirkwood_i2s_dev_probe(struct platform_device *pdev) priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_128; }
- err = devm_snd_soc_register_component(&pdev->dev, &kirkwood_soc_component, + err = snd_soc_register_component(&pdev->dev, &kirkwood_soc_component, soc_dai, 2); if (err) { dev_err(&pdev->dev, "snd_soc_register_component failed\n"); @@ -610,6 +610,7 @@ static int kirkwood_i2s_dev_remove(struct platform_device *pdev) { struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
+ snd_soc_unregister_component(&pdev->dev); if (!IS_ERR(priv->extclk)) clk_disable_unprepare(priv->extclk); clk_disable_unprepare(priv->clk);