diff options
Diffstat (limited to 'sound/core/hrtimer.c')
| -rw-r--r-- | sound/core/hrtimer.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/sound/core/hrtimer.c b/sound/core/hrtimer.c index 34c7d48f506..886be7da989 100644 --- a/sound/core/hrtimer.c +++ b/sound/core/hrtimer.c @@ -19,6 +19,7 @@ */ #include <linux/init.h> +#include <linux/slab.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/hrtimer.h> @@ -37,14 +38,23 @@ static unsigned int resolution; struct snd_hrtimer { struct snd_timer *timer; struct hrtimer hrt; + atomic_t running; }; static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt) { struct snd_hrtimer *stime = container_of(hrt, struct snd_hrtimer, hrt); struct snd_timer *t = stime->timer; - hrtimer_forward_now(hrt, ns_to_ktime(t->sticks * resolution)); - snd_timer_interrupt(stime->timer, t->sticks); + unsigned long oruns; + + if (!atomic_read(&stime->running)) + return HRTIMER_NORESTART; + + oruns = hrtimer_forward_now(hrt, ns_to_ktime(t->sticks * resolution)); + snd_timer_interrupt(stime->timer, t->sticks * oruns); + + if (!atomic_read(&stime->running)) + return HRTIMER_NORESTART; return HRTIMER_RESTART; } @@ -58,6 +68,7 @@ static int snd_hrtimer_open(struct snd_timer *t) hrtimer_init(&stime->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL); stime->timer = t; stime->hrt.function = snd_hrtimer_callback; + atomic_set(&stime->running, 0); t->private_data = stime; return 0; } @@ -78,21 +89,23 @@ static int snd_hrtimer_start(struct snd_timer *t) { struct snd_hrtimer *stime = t->private_data; + atomic_set(&stime->running, 0); + hrtimer_cancel(&stime->hrt); hrtimer_start(&stime->hrt, ns_to_ktime(t->sticks * resolution), HRTIMER_MODE_REL); + atomic_set(&stime->running, 1); return 0; } static int snd_hrtimer_stop(struct snd_timer *t) { struct snd_hrtimer *stime = t->private_data; - - hrtimer_cancel(&stime->hrt); + atomic_set(&stime->running, 0); return 0; } static struct snd_timer_hardware hrtimer_hw = { - .flags = SNDRV_TIMER_HW_AUTO, + .flags = SNDRV_TIMER_HW_AUTO | SNDRV_TIMER_HW_TASKLET, .open = snd_hrtimer_open, .close = snd_hrtimer_close, .start = snd_hrtimer_start, @@ -113,8 +126,7 @@ static int __init snd_hrtimer_init(void) hrtimer_get_res(CLOCK_MONOTONIC, &tp); if (tp.tv_sec > 0 || !tp.tv_nsec) { - snd_printk(KERN_ERR - "snd-hrtimer: Invalid resolution %u.%09u", + pr_err("snd-hrtimer: Invalid resolution %u.%09u", (unsigned)tp.tv_sec, (unsigned)tp.tv_nsec); return -EINVAL; } |