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| author | Charles Keepax <ckeepax@opensource.wolfsonmicro.com> | 2016-10-21 14:18:48 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-12 11:22:49 +0100 |
| commit | 079c4b43e1fe1557a37bda39872ff3a08dd65cff (patch) | |
| tree | 8f05a77cde72b617d33fb36927f24a781b990ee2 /sound/soc/samsung | |
| parent | 83882724eb6578b4492122224f0824c583cd09d3 (diff) | |
| download | linux-stable-079c4b43e1fe1557a37bda39872ff3a08dd65cff.tar.gz linux-stable-079c4b43e1fe1557a37bda39872ff3a08dd65cff.tar.bz2 linux-stable-079c4b43e1fe1557a37bda39872ff3a08dd65cff.zip | |
ASoC: samsung: i2s: Fixup last IRQ unsafe spin lock call
commit 5faf071d08ddd1c1be66deaa93a09ccf43f5b538 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:
316fa9e09ad7 ("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: ce8bcdbb61d9 ("ASoC: samsung: i2s: Protect more registers with a spinlock")
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/soc/samsung')
| -rw-r--r-- | sound/soc/samsung/i2s.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c index e163b0148c4b..fd6e247d9fd8 100644 --- a/sound/soc/samsung/i2s.c +++ b/sound/soc/samsung/i2s.c @@ -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); } } |