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Diffstat (limited to 'sound/pci/ctxfi/cttimer.c')
-rw-r--r--sound/pci/ctxfi/cttimer.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/sound/pci/ctxfi/cttimer.c b/sound/pci/ctxfi/cttimer.c
index 779c6c3591a5..93b0aedc36d4 100644
--- a/sound/pci/ctxfi/cttimer.c
+++ b/sound/pci/ctxfi/cttimer.c
@@ -180,7 +180,7 @@ static inline unsigned int ct_xfitimer_get_wc(struct ct_timer *atimer)
*
* call this inside the lock and irq disabled
*/
-static int ct_xfitimer_reprogram(struct ct_timer *atimer)
+static int ct_xfitimer_reprogram(struct ct_timer *atimer, int can_update)
{
struct ct_timer_instance *ti;
unsigned int min_intr = (unsigned int)-1;
@@ -216,6 +216,8 @@ static int ct_xfitimer_reprogram(struct ct_timer *atimer)
ti->frag_count = div_u64((u64)pos * CT_TIMER_FREQ +
rate - 1, rate);
}
+ if (ti->need_update && !can_update)
+ min_intr = 0; /* pending to the next irq */
if (ti->frag_count < min_intr)
min_intr = ti->frag_count;
}
@@ -235,7 +237,7 @@ static void ct_xfitimer_check_period(struct ct_timer *atimer)
spin_lock_irqsave(&atimer->list_lock, flags);
list_for_each_entry(ti, &atimer->instance_head, instance_list) {
- if (ti->need_update) {
+ if (ti->running && ti->need_update) {
ti->need_update = 0;
ti->apcm->interrupt(ti->apcm);
}
@@ -252,7 +254,7 @@ static void ct_xfitimer_callback(struct ct_timer *atimer)
spin_lock_irqsave(&atimer->lock, flags);
atimer->irq_handling = 1;
do {
- update = ct_xfitimer_reprogram(atimer);
+ update = ct_xfitimer_reprogram(atimer, 1);
spin_unlock(&atimer->lock);
if (update)
ct_xfitimer_check_period(atimer);
@@ -265,6 +267,7 @@ static void ct_xfitimer_callback(struct ct_timer *atimer)
static void ct_xfitimer_prepare(struct ct_timer_instance *ti)
{
ti->frag_count = ti->substream->runtime->period_size;
+ ti->running = 0;
ti->need_update = 0;
}
@@ -273,7 +276,6 @@ static void ct_xfitimer_prepare(struct ct_timer_instance *ti)
static void ct_xfitimer_update(struct ct_timer *atimer)
{
unsigned long flags;
- int update;
spin_lock_irqsave(&atimer->lock, flags);
if (atimer->irq_handling) {
@@ -284,10 +286,8 @@ static void ct_xfitimer_update(struct ct_timer *atimer)
}
ct_xfitimer_irq_stop(atimer);
- update = ct_xfitimer_reprogram(atimer);
+ ct_xfitimer_reprogram(atimer, 0);
spin_unlock_irqrestore(&atimer->lock, flags);
- if (update)
- ct_xfitimer_check_period(atimer);
}
static void ct_xfitimer_start(struct ct_timer_instance *ti)
@@ -298,6 +298,8 @@ static void ct_xfitimer_start(struct ct_timer_instance *ti)
spin_lock_irqsave(&atimer->lock, flags);
if (list_empty(&ti->running_list))
atimer->wc = ct_xfitimer_get_wc(atimer);
+ ti->running = 1;
+ ti->need_update = 0;
list_add(&ti->running_list, &atimer->running_head);
spin_unlock_irqrestore(&atimer->lock, flags);
ct_xfitimer_update(atimer);
@@ -310,7 +312,7 @@ static void ct_xfitimer_stop(struct ct_timer_instance *ti)
spin_lock_irqsave(&atimer->lock, flags);
list_del_init(&ti->running_list);
- ti->need_update = 0;
+ ti->running = 0;
spin_unlock_irqrestore(&atimer->lock, flags);
ct_xfitimer_update(atimer);
}