Commit 079c4b43 authored by Charles Keepax's avatar Charles Keepax Committed by Greg Kroah-Hartman

ASoC: samsung: i2s: Fixup last IRQ unsafe spin lock call

commit 5faf071d upstream.

Unfortunately, I seem to have missed a case where an IRQ safe spinlock was
required, in samsung_i2s_dai_remove, when I fixed up the other calls in
this patch:

316fa9e0 ("ASoC: samsung: Use IRQ safe spin lock calls")

This causes a lockdep warning when unbinding and rebinding the audio card:

[  104.357664]        CPU0                    CPU1
[  104.362174]        ----                    ----
[  104.366692]   lock(&(&pri_dai->spinlock)->rlock);
[  104.371372]                                local_irq_disable();
[  104.377283]                                lock(&(&substream->self_group.lock)->rlock);
[  104.385259]                                lock(&(&pri_dai->spinlock)->rlock);
[  104.392469]   <Interrupt>
[  104.395072]     lock(&(&substream->self_group.lock)->rlock);
[  104.400710]
[  104.400710]  *** DEADLOCK ***

Fixes: ce8bcdbb ("ASoC: samsung: i2s: Protect more registers with a spinlock")
Signed-off-by: default avatarCharles Keepax <ckeepax@opensource.wolfsonmicro.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 83882724
......@@ -1027,12 +1027,13 @@ static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
{
struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
unsigned long flags;
if (!is_secondary(i2s)) {
if (i2s->quirks & QUIRK_NEED_RSTCLR) {
spin_lock(i2s->lock);
spin_lock_irqsave(i2s->lock, flags);
writel(0, i2s->addr + I2SCON);
spin_unlock(i2s->lock);
spin_unlock_irqrestore(i2s->lock, flags);
}
}
......
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