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ASoC: sst_platform: Fix lock acquring

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Fix the possible dead lock shown below:

spin_lock
sst_get_stream_status
sst_period_elapsed
intel_sst_interrupt
handle_IRQ_event
handle_fasteoi_irq
do_IRQ
common_interrupt
spin_lock
sst_set_stream_status
sst_platform_pcm_trigger

Signed-off-by: Lu Guanqun <guanqun.lu@intel.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Lu Guanqun 2011-04-08 15:38:48 +08:00 committed by Mark Brown
parent d985f27e13
commit d89b0a136e
1 changed files with 6 additions and 4 deletions
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10
sound/soc/mid-x86/sst_platform.c
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@ -116,18 +116,20 @@ struct snd_soc_dai_driver sst_platform_dai[] = {
static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
int state)
{
spin_lock(&stream->status_lock);
unsigned long flags;
spin_lock_irqsave(&stream->status_lock, flags);
stream->stream_status = state;
spin_unlock(&stream->status_lock);
spin_unlock_irqrestore(&stream->status_lock, flags);
}
static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
{
int state;
unsigned long flags;
spin_lock(&stream->status_lock);
spin_lock_irqsave(&stream->status_lock, flags);
state = stream->stream_status;
spin_unlock(&stream->status_lock);
spin_unlock_irqrestore(&stream->status_lock, flags);
return state;
}