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ALSA: seq: prioq: Use guard() for locking

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We can simplify the code gracefully with new guard() macro and co for
automatic cleanup of locks.

Only the code refactoring, and no functional changes.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20240227085306.9764-21-tiwai@suse.de
This commit is contained in:
Takashi Iwai 2024-02-27 09:53:02 +01:00
parent a04f2c3960
commit 1affe7bb50
1 changed files with 26 additions and 33 deletions
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59
sound/core/seq/seq_prioq.c
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@ -132,7 +132,6 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f,
struct snd_seq_event_cell * cell)
{
struct snd_seq_event_cell *cur, *prev;
unsigned long flags;
int count;
int prior;
@ -142,7 +141,7 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f,
/* check flags */
prior = (cell->event.flags & SNDRV_SEQ_PRIORITY_MASK);
spin_lock_irqsave(&f->lock, flags);
guard(spinlock_irqsave)(&f->lock);
/* check if this element needs to inserted at the end (ie. ordered
data is inserted) This will be very likeley if a sequencer
@ -154,7 +153,6 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f,
f->tail = cell;
cell->next = NULL;
f->cells++;
spin_unlock_irqrestore(&f->lock, flags);
return 0;
}
}
@ -179,7 +177,6 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f,
prev = cur;
cur = cur->next;
if (! --count) {
spin_unlock_irqrestore(&f->lock, flags);
pr_err("ALSA: seq: cannot find a pointer.. infinite loop?\n");
return -EINVAL;
}
@ -195,7 +192,6 @@ int snd_seq_prioq_cell_in(struct snd_seq_prioq * f,
if (cur == NULL) /* reached end of the list */
f->tail = cell;
f->cells++;
spin_unlock_irqrestore(&f->lock, flags);
return 0;
}
@ -213,14 +209,13 @@ struct snd_seq_event_cell *snd_seq_prioq_cell_out(struct snd_seq_prioq *f,
void *current_time)
{
struct snd_seq_event_cell *cell;
unsigned long flags;
if (f == NULL) {
pr_debug("ALSA: seq: snd_seq_prioq_cell_in() called with NULL prioq\n");
return NULL;
}
spin_lock_irqsave(&f->lock, flags);
guard(spinlock_irqsave)(&f->lock);
cell = f->head;
if (cell && current_time && !event_is_ready(&cell->event, current_time))
cell = NULL;
@ -235,7 +230,6 @@ struct snd_seq_event_cell *snd_seq_prioq_cell_out(struct snd_seq_prioq *f,
f->cells--;
}
spin_unlock_irqrestore(&f->lock, flags);
return cell;
}
@ -256,37 +250,36 @@ static void prioq_remove_cells(struct snd_seq_prioq *f,
void *arg)
{
register struct snd_seq_event_cell *cell, *next;
unsigned long flags;
struct snd_seq_event_cell *prev = NULL;
struct snd_seq_event_cell *freefirst = NULL, *freeprev = NULL, *freenext;
/* collect all removed cells */
spin_lock_irqsave(&f->lock, flags);
for (cell = f->head; cell; cell = next) {
next = cell->next;
if (!match(cell, arg)) {
prev = cell;
continue;
scoped_guard(spinlock_irqsave, &f->lock) {
for (cell = f->head; cell; cell = next) {
next = cell->next;
if (!match(cell, arg)) {
prev = cell;
continue;
}
/* remove cell from prioq */
if (cell == f->head)
f->head = cell->next;
else
prev->next = cell->next;
if (cell == f->tail)
f->tail = cell->next;
f->cells--;
/* add cell to free list */
cell->next = NULL;
if (freefirst == NULL)
freefirst = cell;
else
freeprev->next = cell;
freeprev = cell;
}
/* remove cell from prioq */
if (cell == f->head)
f->head = cell->next;
else
prev->next = cell->next;
if (cell == f->tail)
f->tail = cell->next;
f->cells--;
/* add cell to free list */
cell->next = NULL;
if (freefirst == NULL)
freefirst = cell;
else
freeprev->next = cell;
freeprev = cell;
}
spin_unlock_irqrestore(&f->lock, flags);
/* remove selected cells */
while (freefirst) {