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authorRussell King <rmk+kernel@armlinux.org.uk>2019-10-23 14:46:49 +0100
committerMark Brown <broonie@kernel.org>2019-10-23 18:20:55 +0100
commitdc39596a906d5b604f4e64597b6e904fc14625e8 (patch)
tree240b6e0c2acada80ac7116f2b3c31b593838c04c /sound
parentd10be65f87fc9d98ad3cbdc406e86745fe8c59e2 (diff)
downloadlinux-dc39596a906d5b604f4e64597b6e904fc14625e8.tar.bz2
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>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/kirkwood/kirkwood-i2s.c3
1 files changed, 2 insertions, 1 deletions
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);