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WSL2-Linux-Kernel
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ALSA: pcm: Cleanup snd_pcm_stream_lock() & co 

After the previous code refactoring, the PCM stream locking code
became nothing but the PCM group lock with self_group object.  Use the
existing helper function for simplifying the code.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2019-01-13 10:15:03 +01:00
Родитель ecb41f0f44
Коммит ef2056b8f3
1 изменённых файлов: 16 добавлений и 52 удалений
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68
sound/core/pcm_native.c
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@ -110,52 +110,6 @@ DEFINE_PCM_GROUP_LOCK(unlock, unlock);
DEFINE_PCM_GROUP_LOCK(lock_irq, lock);
DEFINE_PCM_GROUP_LOCK(unlock_irq, unlock);
#define PCM_LOCK_DEFAULT 0
#define PCM_LOCK_IRQ 1
#define PCM_LOCK_IRQSAVE 2
static unsigned long __snd_pcm_stream_lock_mode(struct snd_pcm_substream *substream,
unsigned int mode)
{
unsigned long flags = 0;
if (substream->pcm->nonatomic) {
mutex_lock(&substream->self_group.mutex);
} else {
switch (mode) {
case PCM_LOCK_DEFAULT:
spin_lock(&substream->self_group.lock);
break;
case PCM_LOCK_IRQ:
spin_lock_irq(&substream->self_group.lock);
break;
case PCM_LOCK_IRQSAVE:
spin_lock_irqsave(&substream->self_group.lock, flags);
break;
}
}
return flags;
}
static void __snd_pcm_stream_unlock_mode(struct snd_pcm_substream *substream,
unsigned int mode, unsigned long flags)
{
if (substream->pcm->nonatomic) {
mutex_unlock(&substream->self_group.mutex);
} else {
switch (mode) {
case PCM_LOCK_DEFAULT:
spin_unlock(&substream->self_group.lock);
break;
case PCM_LOCK_IRQ:
spin_unlock_irq(&substream->self_group.lock);
break;
case PCM_LOCK_IRQSAVE:
spin_unlock_irqrestore(&substream->self_group.lock, flags);
break;
}
}
}
/**
* snd_pcm_stream_lock - Lock the PCM stream
* @substream: PCM substream
@ -166,7 +120,7 @@ static void __snd_pcm_stream_unlock_mode(struct snd_pcm_substream *substream,
*/
void snd_pcm_stream_lock(struct snd_pcm_substream *substream)
{
__snd_pcm_stream_lock_mode(substream, PCM_LOCK_DEFAULT);
snd_pcm_group_lock(&substream->self_group, substream->pcm->nonatomic);
}
EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
@ -178,7 +132,7 @@ EXPORT_SYMBOL_GPL(snd_pcm_stream_lock);
*/
void snd_pcm_stream_unlock(struct snd_pcm_substream *substream)
{
__snd_pcm_stream_unlock_mode(substream, PCM_LOCK_DEFAULT, 0);
snd_pcm_group_unlock(&substream->self_group, substream->pcm->nonatomic);
}
EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
@ -192,7 +146,8 @@ EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock);
*/
void snd_pcm_stream_lock_irq(struct snd_pcm_substream *substream)
{
__snd_pcm_stream_lock_mode(substream, PCM_LOCK_IRQ);
snd_pcm_group_lock_irq(&substream->self_group,
substream->pcm->nonatomic);
}
EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
@ -204,13 +159,19 @@ EXPORT_SYMBOL_GPL(snd_pcm_stream_lock_irq);
*/
void snd_pcm_stream_unlock_irq(struct snd_pcm_substream *substream)
{
__snd_pcm_stream_unlock_mode(substream, PCM_LOCK_IRQ, 0);
snd_pcm_group_unlock_irq(&substream->self_group,
substream->pcm->nonatomic);
}
EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irq);
unsigned long _snd_pcm_stream_lock_irqsave(struct snd_pcm_substream *substream)
{
return __snd_pcm_stream_lock_mode(substream, PCM_LOCK_IRQSAVE);
unsigned long flags = 0;
if (substream->pcm->nonatomic)
mutex_lock(&substream->self_group.mutex);
else
spin_lock_irqsave(&substream->self_group.lock, flags);
return flags;
}
EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
@ -224,7 +185,10 @@ EXPORT_SYMBOL_GPL(_snd_pcm_stream_lock_irqsave);
void snd_pcm_stream_unlock_irqrestore(struct snd_pcm_substream *substream,
unsigned long flags)
{
__snd_pcm_stream_unlock_mode(substream, PCM_LOCK_IRQSAVE, flags);
if (substream->pcm->nonatomic)
mutex_unlock(&substream->self_group.mutex);
else
spin_unlock_irqrestore(&substream->self_group.lock, flags);
}
EXPORT_SYMBOL_GPL(snd_pcm_stream_unlock_irqrestore);