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Diffstat (limited to 'sound/core/timer.c')
-rw-r--r--sound/core/timer.c55
1 files changed, 34 insertions, 21 deletions
diff --git a/sound/core/timer.c b/sound/core/timer.c
index 8f8b17ac074..777a45e08e5 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -24,7 +24,8 @@
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/mutex.h>
-#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/module.h>
#include <linux/string.h>
#include <sound/core.h>
#include <sound/timer.h>
@@ -34,9 +35,9 @@
#include <sound/initval.h>
#include <linux/kmod.h>
-#if defined(CONFIG_SND_HPET) || defined(CONFIG_SND_HPET_MODULE)
-#define DEFAULT_TIMER_LIMIT 3
-#elif defined(CONFIG_SND_RTCTIMER) || defined(CONFIG_SND_RTCTIMER_MODULE)
+#if IS_ENABLED(CONFIG_SND_HRTIMER)
+#define DEFAULT_TIMER_LIMIT 4
+#elif IS_ENABLED(CONFIG_SND_RTCTIMER)
#define DEFAULT_TIMER_LIMIT 2
#else
#define DEFAULT_TIMER_LIMIT 1
@@ -52,6 +53,9 @@ MODULE_PARM_DESC(timer_limit, "Maximum global timers in system.");
module_param(timer_tstamp_monotonic, int, 0444);
MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default).");
+MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER);
+MODULE_ALIAS("devname:snd/timer");
+
struct snd_timer_user {
struct snd_timer_instance *timeri;
int tread; /* enhanced read with timestamps and events */
@@ -183,9 +187,8 @@ static void snd_timer_check_slave(struct snd_timer_instance *slave)
list_for_each_entry(master, &timer->open_list_head, open_list) {
if (slave->slave_class == master->slave_class &&
slave->slave_id == master->slave_id) {
- list_del(&slave->open_list);
- list_add_tail(&slave->open_list,
- &master->slave_list_head);
+ list_move_tail(&slave->open_list,
+ &master->slave_list_head);
spin_lock_irq(&slave_active_lock);
slave->master = master;
slave->timer = master->timer;
@@ -237,7 +240,8 @@ int snd_timer_open(struct snd_timer_instance **ti,
/* open a slave instance */
if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE ||
tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) {
- snd_printd("invalid slave class %i\n", tid->dev_sclass);
+ pr_debug("ALSA: timer: invalid slave class %i\n",
+ tid->dev_sclass);
return -EINVAL;
}
mutex_lock(&register_mutex);
@@ -326,6 +330,8 @@ int snd_timer_close(struct snd_timer_instance *timeri)
mutex_unlock(&register_mutex);
} else {
timer = timeri->timer;
+ if (snd_BUG_ON(!timer))
+ goto out;
/* wait, until the active callback is finished */
spin_lock_irq(&timer->lock);
while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) {
@@ -351,6 +357,7 @@ int snd_timer_close(struct snd_timer_instance *timeri)
}
mutex_unlock(&register_mutex);
}
+ out:
if (timeri->private_free)
timeri->private_free(timeri);
kfree(timeri->owner);
@@ -383,7 +390,7 @@ static void snd_timer_notify1(struct snd_timer_instance *ti, int event)
struct timespec tstamp;
if (timer_tstamp_monotonic)
- do_posix_clock_monotonic_gettime(&tstamp);
+ ktime_get_ts(&tstamp);
else
getnstimeofday(&tstamp);
if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START ||
@@ -393,7 +400,7 @@ static void snd_timer_notify1(struct snd_timer_instance *ti, int event)
event == SNDRV_TIMER_EVENT_CONTINUE)
resolution = snd_timer_resolution(ti);
if (ti->ccallback)
- ti->ccallback(ti, SNDRV_TIMER_EVENT_START, &tstamp, resolution);
+ ti->ccallback(ti, event, &tstamp, resolution);
if (ti->flags & SNDRV_TIMER_IFLG_SLAVE)
return;
timer = ti->timer;
@@ -411,8 +418,7 @@ static void snd_timer_notify1(struct snd_timer_instance *ti, int event)
static int snd_timer_start1(struct snd_timer *timer, struct snd_timer_instance *timeri,
unsigned long sticks)
{
- list_del(&timeri->active_list);
- list_add_tail(&timeri->active_list, &timer->active_list_head);
+ list_move_tail(&timeri->active_list, &timer->active_list_head);
if (timer->running) {
if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)
goto __start_now;
@@ -530,6 +536,8 @@ int snd_timer_stop(struct snd_timer_instance *timeri)
if (err < 0)
return err;
timer = timeri->timer;
+ if (!timer)
+ return -EINVAL;
spin_lock_irqsave(&timer->lock, flags);
timeri->cticks = timeri->ticks;
timeri->pticks = 0;
@@ -767,7 +775,7 @@ int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid,
*rtimer = NULL;
timer = kzalloc(sizeof(*timer), GFP_KERNEL);
if (timer == NULL) {
- snd_printk(KERN_ERR "timer: cannot allocate\n");
+ pr_err("ALSA: timer: cannot allocate\n");
return -ENOMEM;
}
timer->tmr_class = tid->dev_class;
@@ -806,7 +814,7 @@ static int snd_timer_free(struct snd_timer *timer)
if (! list_empty(&timer->open_list_head)) {
struct list_head *p, *n;
struct snd_timer_instance *ti;
- snd_printk(KERN_WARNING "timer %p is busy?\n", timer);
+ pr_warn("ALSA: timer %p is busy?\n", timer);
list_for_each_safe(p, n, &timer->open_list_head) {
list_del_init(p);
ti = list_entry(p, struct snd_timer_instance, open_list);
@@ -1160,6 +1168,7 @@ static void snd_timer_user_ccallback(struct snd_timer_instance *timeri,
{
struct snd_timer_user *tu = timeri->callback_data;
struct snd_timer_tread r1;
+ unsigned long flags;
if (event >= SNDRV_TIMER_EVENT_START &&
event <= SNDRV_TIMER_EVENT_PAUSE)
@@ -1169,9 +1178,9 @@ static void snd_timer_user_ccallback(struct snd_timer_instance *timeri,
r1.event = event;
r1.tstamp = *tstamp;
r1.val = resolution;
- spin_lock(&tu->qlock);
+ spin_lock_irqsave(&tu->qlock, flags);
snd_timer_user_append_to_tqueue(tu, &r1);
- spin_unlock(&tu->qlock);
+ spin_unlock_irqrestore(&tu->qlock, flags);
kill_fasync(&tu->fasync, SIGIO, POLL_IN);
wake_up(&tu->qchange_sleep);
}
@@ -1194,7 +1203,7 @@ static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri,
}
if (tu->last_resolution != resolution || ticks > 0) {
if (timer_tstamp_monotonic)
- do_posix_clock_monotonic_gettime(&tstamp);
+ ktime_get_ts(&tstamp);
else
getnstimeofday(&tstamp);
}
@@ -1237,6 +1246,11 @@ static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri,
static int snd_timer_user_open(struct inode *inode, struct file *file)
{
struct snd_timer_user *tu;
+ int err;
+
+ err = nonseekable_open(inode, file);
+ if (err < 0)
+ return err;
tu = kzalloc(sizeof(*tu), GFP_KERNEL);
if (tu == NULL)
@@ -1921,6 +1935,7 @@ static const struct file_operations snd_timer_f_ops =
.read = snd_timer_user_read,
.open = snd_timer_user_open,
.release = snd_timer_user_release,
+ .llseek = no_llseek,
.poll = snd_timer_user_poll,
.unlocked_ioctl = snd_timer_user_ioctl,
.compat_ioctl = snd_timer_user_ioctl_compat,
@@ -1941,12 +1956,10 @@ static int __init alsa_timer_init(void)
#endif
if ((err = snd_timer_register_system()) < 0)
- snd_printk(KERN_ERR "unable to register system timer (%i)\n",
- err);
+ pr_err("ALSA: unable to register system timer (%i)\n", err);
if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0,
&snd_timer_f_ops, NULL, "timer")) < 0)
- snd_printk(KERN_ERR "unable to register timer device (%i)\n",
- err);
+ pr_err("ALSA: unable to register timer device (%i)\n", err);
snd_timer_proc_init();
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 06:46:47 +0000