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ALSA: dummy: Use guard() for spin locks 

Clean up the code using guard() for spin locks.

Merely code refactoring, and no behavior change.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250829150026.6379-9-tiwai@suse.de
This commit is contained in:
Takashi Iwai 2025-08-29 17:00:19 +02:00
parent 353fc3e381
commit 638c33ef79
1 changed files with 16 additions and 24 deletions
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32
sound/drivers/dummy.c
View File

@ -269,19 +269,19 @@ static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm)
static int dummy_systimer_start(struct snd_pcm_substream *substream)
{
struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
spin_lock(&dpcm->lock);
guard(spinlock)(&dpcm->lock);
dpcm->base_time = jiffies;
dummy_systimer_rearm(dpcm);
spin_unlock(&dpcm->lock);
return 0;
}
static int dummy_systimer_stop(struct snd_pcm_substream *substream)
{
struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
spin_lock(&dpcm->lock);
guard(spinlock)(&dpcm->lock);
timer_delete(&dpcm->timer);
spin_unlock(&dpcm->lock);
return 0;
}
@ -303,15 +303,14 @@ static int dummy_systimer_prepare(struct snd_pcm_substream *substream)
static void dummy_systimer_callback(struct timer_list *t)
{
struct dummy_systimer_pcm *dpcm = timer_container_of(dpcm, t, timer);
unsigned long flags;
int elapsed = 0;
spin_lock_irqsave(&dpcm->lock, flags);
scoped_guard(spinlock_irqsave, &dpcm->lock) {
dummy_systimer_update(dpcm);
dummy_systimer_rearm(dpcm);
elapsed = dpcm->elapsed;
dpcm->elapsed = 0;
spin_unlock_irqrestore(&dpcm->lock, flags);
}
if (elapsed)
snd_pcm_period_elapsed(dpcm->substream);
}
@ -320,13 +319,10 @@ static snd_pcm_uframes_t
dummy_systimer_pointer(struct snd_pcm_substream *substream)
{
struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;
snd_pcm_uframes_t pos;
spin_lock(&dpcm->lock);
guard(spinlock)(&dpcm->lock);
dummy_systimer_update(dpcm);
pos = dpcm->frac_pos / HZ;
spin_unlock(&dpcm->lock);
return pos;
return dpcm->frac_pos / HZ;
}
static int dummy_systimer_create(struct snd_pcm_substream *substream)
@ -724,10 +720,9 @@ static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol,
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
int addr = kcontrol->private_value;
spin_lock_irq(&dummy->mixer_lock);
guard(spinlock_irq)(&dummy->mixer_lock);
ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
spin_unlock_irq(&dummy->mixer_lock);
return 0;
}
@ -748,12 +743,11 @@ static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol,
right = mixer_volume_level_min;
if (right > mixer_volume_level_max)
right = mixer_volume_level_max;
spin_lock_irq(&dummy->mixer_lock);
guard(spinlock_irq)(&dummy->mixer_lock);
change = dummy->mixer_volume[addr][0] != left ||
dummy->mixer_volume[addr][1] != right;
dummy->mixer_volume[addr][0] = left;
dummy->mixer_volume[addr][1] = right;
spin_unlock_irq(&dummy->mixer_lock);
return change;
}
@ -773,10 +767,9 @@ static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol,
struct snd_dummy *dummy = snd_kcontrol_chip(kcontrol);
int addr = kcontrol->private_value;
spin_lock_irq(&dummy->mixer_lock);
guard(spinlock_irq)(&dummy->mixer_lock);
ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
spin_unlock_irq(&dummy->mixer_lock);
return 0;
}
@ -788,12 +781,11 @@ static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_el
left = ucontrol->value.integer.value[0] & 1;
right = ucontrol->value.integer.value[1] & 1;
spin_lock_irq(&dummy->mixer_lock);
guard(spinlock_irq)(&dummy->mixer_lock);
change = dummy->capture_source[addr][0] != left &&
dummy->capture_source[addr][1] != right;
dummy->capture_source[addr][0] = left;
dummy->capture_source[addr][1] = right;
spin_unlock_irq(&dummy->mixer_lock);
return change;
}