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Diffstat (limited to 'sound/core/timer.c')
-rw-r--r--sound/core/timer.c314
1 files changed, 150 insertions, 164 deletions
diff --git a/sound/core/timer.c b/sound/core/timer.c
index cdeeb639b67..777a45e08e5 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -1,6 +1,6 @@
/*
* Timers abstract layer
- * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
*
*
* This program is free software; you can redistribute it and/or modify
@@ -19,14 +19,13 @@
*
*/
-#include <sound/driver.h>
#include <linux/delay.h>
#include <linux/init.h>
-#include <linux/smp_lock.h>
#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>
@@ -35,24 +34,27 @@
#include <sound/minors.h>
#include <sound/initval.h>
#include <linux/kmod.h>
-#ifdef CONFIG_KERNELD
-#include <linux/kerneld.h>
-#endif
-#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
#endif
static int timer_limit = DEFAULT_TIMER_LIMIT;
-MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Takashi Iwai <tiwai@suse.de>");
+static int timer_tstamp_monotonic = 1;
+MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>");
MODULE_DESCRIPTION("ALSA timer interface");
MODULE_LICENSE("GPL");
module_param(timer_limit, int, 0444);
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;
@@ -88,7 +90,7 @@ static DEFINE_MUTEX(register_mutex);
static int snd_timer_free(struct snd_timer *timer);
static int snd_timer_dev_free(struct snd_device *device);
static int snd_timer_dev_register(struct snd_device *device);
-static int snd_timer_dev_unregister(struct snd_device *device);
+static int snd_timer_dev_disconnect(struct snd_device *device);
static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left);
@@ -130,11 +132,8 @@ static struct snd_timer_instance *snd_timer_instance_new(char *owner,
static struct snd_timer *snd_timer_find(struct snd_timer_id *tid)
{
struct snd_timer *timer = NULL;
- struct list_head *p;
-
- list_for_each(p, &snd_timer_list) {
- timer = list_entry(p, struct snd_timer, device_list);
+ list_for_each_entry(timer, &snd_timer_list, device_list) {
if (timer->tmr_class != tid->dev_class)
continue;
if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD ||
@@ -151,12 +150,10 @@ static struct snd_timer *snd_timer_find(struct snd_timer_id *tid)
return NULL;
}
-#ifdef CONFIG_KMOD
+#ifdef CONFIG_MODULES
static void snd_timer_request(struct snd_timer_id *tid)
{
- if (! current->fs->root)
- return;
switch (tid->dev_class) {
case SNDRV_TIMER_CLASS_GLOBAL:
if (tid->device < timer_limit)
@@ -184,18 +181,14 @@ static void snd_timer_check_slave(struct snd_timer_instance *slave)
{
struct snd_timer *timer;
struct snd_timer_instance *master;
- struct list_head *p, *q;
/* FIXME: it's really dumb to look up all entries.. */
- list_for_each(p, &snd_timer_list) {
- timer = list_entry(p, struct snd_timer, device_list);
- list_for_each(q, &timer->open_list_head) {
- master = list_entry(q, struct snd_timer_instance, open_list);
+ list_for_each_entry(timer, &snd_timer_list, device_list) {
+ 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;
@@ -214,16 +207,13 @@ static void snd_timer_check_slave(struct snd_timer_instance *slave)
*/
static void snd_timer_check_master(struct snd_timer_instance *master)
{
- struct snd_timer_instance *slave;
- struct list_head *p, *n;
+ struct snd_timer_instance *slave, *tmp;
/* check all pending slaves */
- list_for_each_safe(p, n, &snd_timer_slave_list) {
- slave = list_entry(p, struct snd_timer_instance, open_list);
+ list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) {
if (slave->slave_class == master->slave_class &&
slave->slave_id == master->slave_id) {
- list_del(p);
- list_add_tail(p, &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;
@@ -250,7 +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);
@@ -272,8 +263,8 @@ int snd_timer_open(struct snd_timer_instance **ti,
/* open a master instance */
mutex_lock(&register_mutex);
timer = snd_timer_find(tid);
-#ifdef CONFIG_KMOD
- if (timer == NULL) {
+#ifdef CONFIG_MODULES
+ if (!timer) {
mutex_unlock(&register_mutex);
snd_timer_request(tid);
mutex_lock(&register_mutex);
@@ -317,10 +308,10 @@ static int _snd_timer_stop(struct snd_timer_instance *timeri,
int snd_timer_close(struct snd_timer_instance *timeri)
{
struct snd_timer *timer = NULL;
- struct list_head *p, *n;
- struct snd_timer_instance *slave;
+ struct snd_timer_instance *slave, *tmp;
- snd_assert(timeri != NULL, return -ENXIO);
+ if (snd_BUG_ON(!timeri))
+ return -ENXIO;
/* force to stop the timer */
snd_timer_stop(timeri);
@@ -339,6 +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) {
@@ -353,18 +346,18 @@ int snd_timer_close(struct snd_timer_instance *timeri)
timer->hw.close)
timer->hw.close(timer);
/* remove slave links */
- list_for_each_safe(p, n, &timeri->slave_list_head) {
- slave = list_entry(p, struct snd_timer_instance, open_list);
+ list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head,
+ open_list) {
spin_lock_irq(&slave_active_lock);
_snd_timer_stop(slave, 1, SNDRV_TIMER_EVENT_RESOLUTION);
- list_del(p);
- list_add_tail(p, &snd_timer_slave_list);
+ list_move_tail(&slave->open_list, &snd_timer_slave_list);
slave->master = NULL;
slave->timer = NULL;
spin_unlock_irq(&slave_active_lock);
}
mutex_unlock(&register_mutex);
}
+ out:
if (timeri->private_free)
timeri->private_free(timeri);
kfree(timeri->owner);
@@ -394,17 +387,20 @@ static void snd_timer_notify1(struct snd_timer_instance *ti, int event)
unsigned long flags;
unsigned long resolution = 0;
struct snd_timer_instance *ts;
- struct list_head *n;
struct timespec tstamp;
- getnstimeofday(&tstamp);
- snd_assert(event >= SNDRV_TIMER_EVENT_START &&
- event <= SNDRV_TIMER_EVENT_PAUSE, return);
+ if (timer_tstamp_monotonic)
+ ktime_get_ts(&tstamp);
+ else
+ getnstimeofday(&tstamp);
+ if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START ||
+ event > SNDRV_TIMER_EVENT_PAUSE))
+ return;
if (event == SNDRV_TIMER_EVENT_START ||
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;
@@ -413,19 +409,16 @@ static void snd_timer_notify1(struct snd_timer_instance *ti, int event)
if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)
return;
spin_lock_irqsave(&timer->lock, flags);
- list_for_each(n, &ti->slave_active_head) {
- ts = list_entry(n, struct snd_timer_instance, active_list);
+ list_for_each_entry(ts, &ti->slave_active_head, active_list)
if (ts->ccallback)
ts->ccallback(ti, event + 100, &tstamp, resolution);
- }
spin_unlock_irqrestore(&timer->lock, flags);
}
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;
@@ -489,7 +482,8 @@ static int _snd_timer_stop(struct snd_timer_instance * timeri,
struct snd_timer *timer;
unsigned long flags;
- snd_assert(timeri != NULL, return -ENXIO);
+ if (snd_BUG_ON(!timeri))
+ return -ENXIO;
if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) {
if (!keep_flag) {
@@ -542,6 +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;
@@ -593,10 +589,8 @@ static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_l
{
struct snd_timer_instance *ti;
unsigned long ticks = ~0UL;
- struct list_head *p;
- list_for_each(p, &timer->active_list_head) {
- ti = list_entry(p, struct snd_timer_instance, active_list);
+ list_for_each_entry(ti, &timer->active_list_head, active_list) {
if (ti->flags & SNDRV_TIMER_IFLG_START) {
ti->flags &= ~SNDRV_TIMER_IFLG_START;
ti->flags |= SNDRV_TIMER_IFLG_RUNNING;
@@ -628,8 +622,9 @@ static void snd_timer_tasklet(unsigned long arg)
struct snd_timer_instance *ti;
struct list_head *p;
unsigned long resolution, ticks;
+ unsigned long flags;
- spin_lock(&timer->lock);
+ spin_lock_irqsave(&timer->lock, flags);
/* now process all callbacks */
while (!list_empty(&timer->sack_list_head)) {
p = timer->sack_list_head.next; /* get first item */
@@ -649,7 +644,7 @@ static void snd_timer_tasklet(unsigned long arg)
spin_lock(&timer->lock);
ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK;
}
- spin_unlock(&timer->lock);
+ spin_unlock_irqrestore(&timer->lock, flags);
}
/*
@@ -660,9 +655,9 @@ static void snd_timer_tasklet(unsigned long arg)
*/
void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left)
{
- struct snd_timer_instance *ti, *ts;
+ struct snd_timer_instance *ti, *ts, *tmp;
unsigned long resolution, ticks;
- struct list_head *p, *q, *n, *ack_list_head;
+ struct list_head *p, *ack_list_head;
unsigned long flags;
int use_tasklet = 0;
@@ -678,12 +673,12 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left)
resolution = timer->hw.resolution;
/* loop for all active instances
- * Here we cannot use list_for_each because the active_list of a
+ * Here we cannot use list_for_each_entry because the active_list of a
* processed instance is relinked to done_list_head before the callback
* is called.
*/
- list_for_each_safe(p, n, &timer->active_list_head) {
- ti = list_entry(p, struct snd_timer_instance, active_list);
+ list_for_each_entry_safe(ti, tmp, &timer->active_list_head,
+ active_list) {
if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING))
continue;
ti->pticks += ticks_left;
@@ -699,7 +694,7 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left)
} else {
ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
if (--timer->running)
- list_del(p);
+ list_del(&ti->active_list);
}
if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) ||
(ti->flags & SNDRV_TIMER_IFLG_FAST))
@@ -708,8 +703,7 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left)
ack_list_head = &timer->sack_list_head;
if (list_empty(&ti->ack_list))
list_add_tail(&ti->ack_list, ack_list_head);
- list_for_each(q, &ti->slave_active_head) {
- ts = list_entry(q, struct snd_timer_instance, active_list);
+ list_for_each_entry(ts, &ti->slave_active_head, active_list) {
ts->pticks = ti->pticks;
ts->resolution = resolution;
if (list_empty(&ts->ack_list))
@@ -717,7 +711,7 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left)
}
}
if (timer->flags & SNDRV_TIMER_FLG_RESCHED)
- snd_timer_reschedule(timer, ticks_left);
+ snd_timer_reschedule(timer, timer->sticks);
if (timer->running) {
if (timer->hw.flags & SNDRV_TIMER_HW_STOP) {
timer->hw.stop(timer);
@@ -757,7 +751,7 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left)
spin_unlock_irqrestore(&timer->lock, flags);
if (use_tasklet)
- tasklet_hi_schedule(&timer->task_queue);
+ tasklet_schedule(&timer->task_queue);
}
/*
@@ -772,15 +766,16 @@ int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid,
static struct snd_device_ops ops = {
.dev_free = snd_timer_dev_free,
.dev_register = snd_timer_dev_register,
- .dev_unregister = snd_timer_dev_unregister
+ .dev_disconnect = snd_timer_dev_disconnect,
};
- snd_assert(tid != NULL, return -EINVAL);
- snd_assert(rtimer != NULL, return -EINVAL);
- *rtimer = NULL;
+ if (snd_BUG_ON(!tid))
+ return -EINVAL;
+ if (rtimer)
+ *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;
@@ -805,13 +800,30 @@ int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid,
return err;
}
}
- *rtimer = timer;
+ if (rtimer)
+ *rtimer = timer;
return 0;
}
static int snd_timer_free(struct snd_timer *timer)
{
- snd_assert(timer != NULL, return -ENXIO);
+ if (!timer)
+ return 0;
+
+ mutex_lock(&register_mutex);
+ if (! list_empty(&timer->open_list_head)) {
+ struct list_head *p, *n;
+ struct snd_timer_instance *ti;
+ 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);
+ ti->timer = NULL;
+ }
+ }
+ list_del(&timer->device_list);
+ mutex_unlock(&register_mutex);
+
if (timer->private_free)
timer->private_free(timer);
kfree(timer);
@@ -828,17 +840,15 @@ static int snd_timer_dev_register(struct snd_device *dev)
{
struct snd_timer *timer = dev->device_data;
struct snd_timer *timer1;
- struct list_head *p;
- snd_assert(timer != NULL && timer->hw.start != NULL &&
- timer->hw.stop != NULL, return -ENXIO);
+ if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop))
+ return -ENXIO;
if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) &&
!timer->hw.resolution && timer->hw.c_resolution == NULL)
return -EINVAL;
mutex_lock(&register_mutex);
- list_for_each(p, &snd_timer_list) {
- timer1 = list_entry(p, struct snd_timer, device_list);
+ list_for_each_entry(timer1, &snd_timer_list, device_list) {
if (timer1->tmr_class > timer->tmr_class)
break;
if (timer1->tmr_class < timer->tmr_class)
@@ -861,35 +871,18 @@ static int snd_timer_dev_register(struct snd_device *dev)
mutex_unlock(&register_mutex);
return -EBUSY;
}
- list_add_tail(&timer->device_list, p);
+ list_add_tail(&timer->device_list, &timer1->device_list);
mutex_unlock(&register_mutex);
return 0;
}
-static int snd_timer_unregister(struct snd_timer *timer)
+static int snd_timer_dev_disconnect(struct snd_device *device)
{
- struct list_head *p, *n;
- struct snd_timer_instance *ti;
-
- snd_assert(timer != NULL, return -ENXIO);
+ struct snd_timer *timer = device->device_data;
mutex_lock(&register_mutex);
- if (! list_empty(&timer->open_list_head)) {
- snd_printk(KERN_WARNING "timer 0x%lx is busy?\n", (long)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);
- ti->timer = NULL;
- }
- }
- list_del(&timer->device_list);
+ list_del_init(&timer->device_list);
mutex_unlock(&register_mutex);
- return snd_timer_free(timer);
-}
-
-static int snd_timer_dev_unregister(struct snd_device *device)
-{
- struct snd_timer *timer = device->device_data;
- return snd_timer_unregister(timer);
+ return 0;
}
void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp)
@@ -897,12 +890,12 @@ void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstam
unsigned long flags;
unsigned long resolution = 0;
struct snd_timer_instance *ti, *ts;
- struct list_head *p, *n;
if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE))
return;
- snd_assert(event >= SNDRV_TIMER_EVENT_MSTART &&
- event <= SNDRV_TIMER_EVENT_MRESUME, return);
+ if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART ||
+ event > SNDRV_TIMER_EVENT_MRESUME))
+ return;
spin_lock_irqsave(&timer->lock, flags);
if (event == SNDRV_TIMER_EVENT_MSTART ||
event == SNDRV_TIMER_EVENT_MCONTINUE ||
@@ -912,15 +905,12 @@ void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstam
else
resolution = timer->hw.resolution;
}
- list_for_each(p, &timer->active_list_head) {
- ti = list_entry(p, struct snd_timer_instance, active_list);
+ list_for_each_entry(ti, &timer->active_list_head, active_list) {
if (ti->ccallback)
ti->ccallback(ti, event, tstamp, resolution);
- list_for_each(n, &ti->slave_active_head) {
- ts = list_entry(n, struct snd_timer_instance, active_list);
+ list_for_each_entry(ts, &ti->slave_active_head, active_list)
if (ts->ccallback)
ts->ccallback(ts, event, tstamp, resolution);
- }
}
spin_unlock_irqrestore(&timer->lock, flags);
}
@@ -954,18 +944,12 @@ int snd_timer_global_register(struct snd_timer *timer)
return snd_timer_dev_register(&dev);
}
-int snd_timer_global_unregister(struct snd_timer *timer)
-{
- return snd_timer_unregister(timer);
-}
-
/*
* System timer
*/
struct snd_timer_system_private {
struct timer_list tlist;
- struct timer * timer;
unsigned long last_expires;
unsigned long last_jiffies;
unsigned long correction;
@@ -977,7 +961,7 @@ static void snd_timer_s_function(unsigned long data)
struct snd_timer_system_private *priv = timer->private_data;
unsigned long jiff = jiffies;
if (time_after(jiff, priv->last_expires))
- priv->correction = (long)jiff - (long)priv->last_expires;
+ priv->correction += (long)jiff - (long)priv->last_expires;
snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies);
}
@@ -993,7 +977,7 @@ static int snd_timer_s_start(struct snd_timer * timer)
njiff++;
} else {
njiff += timer->sticks - priv->correction;
- priv->correction -= timer->sticks;
+ priv->correction = 0;
}
priv->last_expires = priv->tlist.expires = njiff;
add_timer(&priv->tlist);
@@ -1012,6 +996,7 @@ static int snd_timer_s_stop(struct snd_timer * timer)
timer->sticks = priv->last_expires - jiff;
else
timer->sticks = 1;
+ priv->correction = 0;
return 0;
}
@@ -1061,14 +1046,11 @@ static int snd_timer_register_system(void)
static void snd_timer_proc_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
- unsigned long flags;
struct snd_timer *timer;
struct snd_timer_instance *ti;
- struct list_head *p, *q;
mutex_lock(&register_mutex);
- list_for_each(p, &snd_timer_list) {
- timer = list_entry(p, struct snd_timer, device_list);
+ list_for_each_entry(timer, &snd_timer_list, device_list) {
switch (timer->tmr_class) {
case SNDRV_TIMER_CLASS_GLOBAL:
snd_iprintf(buffer, "G%i: ", timer->tmr_device);
@@ -1095,21 +1077,17 @@ static void snd_timer_proc_read(struct snd_info_entry *entry,
if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)
snd_iprintf(buffer, " SLAVE");
snd_iprintf(buffer, "\n");
- spin_lock_irqsave(&timer->lock, flags);
- list_for_each(q, &timer->open_list_head) {
- ti = list_entry(q, struct snd_timer_instance, open_list);
+ list_for_each_entry(ti, &timer->open_list_head, open_list)
snd_iprintf(buffer, " Client %s : %s\n",
ti->owner ? ti->owner : "unknown",
ti->flags & (SNDRV_TIMER_IFLG_START |
SNDRV_TIMER_IFLG_RUNNING)
? "running" : "stopped");
- }
- spin_unlock_irqrestore(&timer->lock, flags);
}
mutex_unlock(&register_mutex);
}
-static struct snd_info_entry *snd_timer_proc_entry = NULL;
+static struct snd_info_entry *snd_timer_proc_entry;
static void __init snd_timer_proc_init(void)
{
@@ -1117,7 +1095,6 @@ static void __init snd_timer_proc_init(void)
entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL);
if (entry != NULL) {
- entry->c.text.read_size = SNDRV_TIMER_DEVICES * 128;
entry->c.text.read = snd_timer_proc_read;
if (snd_info_register(entry) < 0) {
snd_info_free_entry(entry);
@@ -1129,7 +1106,7 @@ static void __init snd_timer_proc_init(void)
static void __exit snd_timer_proc_done(void)
{
- snd_info_unregister(snd_timer_proc_entry);
+ snd_info_free_entry(snd_timer_proc_entry);
}
#else /* !CONFIG_PROC_FS */
#define snd_timer_proc_init()
@@ -1191,6 +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)
@@ -1200,9 +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);
}
@@ -1223,8 +1201,12 @@ static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri,
spin_unlock(&tu->qlock);
return;
}
- if (tu->last_resolution != resolution || ticks > 0)
- getnstimeofday(&tstamp);
+ if (tu->last_resolution != resolution || ticks > 0) {
+ if (timer_tstamp_monotonic)
+ ktime_get_ts(&tstamp);
+ else
+ getnstimeofday(&tstamp);
+ }
if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) &&
tu->last_resolution != resolution) {
r1.event = SNDRV_TIMER_EVENT_RESOLUTION;
@@ -1264,6 +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)
@@ -1290,7 +1277,6 @@ static int snd_timer_user_release(struct inode *inode, struct file *file)
if (file->private_data) {
tu = file->private_data;
file->private_data = NULL;
- fasync_helper(-1, file, 0, &tu->fasync);
if (tu->timeri)
snd_timer_close(tu->timeri);
kfree(tu->queue);
@@ -1423,13 +1409,10 @@ static int snd_timer_user_ginfo(struct file *file,
struct list_head *p;
int err = 0;
- ginfo = kmalloc(sizeof(*ginfo), GFP_KERNEL);
- if (! ginfo)
- return -ENOMEM;
- if (copy_from_user(ginfo, _ginfo, sizeof(*ginfo))) {
- kfree(ginfo);
- return -EFAULT;
- }
+ ginfo = memdup_user(_ginfo, sizeof(*ginfo));
+ if (IS_ERR(ginfo))
+ return PTR_ERR(ginfo);
+
tid = ginfo->tid;
memset(ginfo, 0, sizeof(*ginfo));
ginfo->tid = tid;
@@ -1590,9 +1573,11 @@ static int snd_timer_user_info(struct file *file,
int err = 0;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
t = tu->timeri->timer;
- snd_assert(t != NULL, return -ENXIO);
+ if (!t)
+ return -EBADFD;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (! info)
@@ -1620,9 +1605,11 @@ static int snd_timer_user_params(struct file *file,
int err;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
t = tu->timeri->timer;
- snd_assert(t != NULL, return -ENXIO);
+ if (!t)
+ return -EBADFD;
if (copy_from_user(&params, _params, sizeof(params)))
return -EFAULT;
if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) {
@@ -1716,7 +1703,8 @@ static int snd_timer_user_status(struct file *file,
struct snd_timer_status status;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
memset(&status, 0, sizeof(status));
status.tstamp = tu->tstamp;
status.resolution = snd_timer_resolution(tu->timeri);
@@ -1736,7 +1724,8 @@ static int snd_timer_user_start(struct file *file)
struct snd_timer_user *tu;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
snd_timer_stop(tu->timeri);
tu->timeri->lost = 0;
tu->last_resolution = 0;
@@ -1749,7 +1738,8 @@ static int snd_timer_user_stop(struct file *file)
struct snd_timer_user *tu;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0;
}
@@ -1759,7 +1749,8 @@ static int snd_timer_user_continue(struct file *file)
struct snd_timer_user *tu;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
tu->timeri->lost = 0;
return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0;
}
@@ -1770,7 +1761,8 @@ static int snd_timer_user_pause(struct file *file)
struct snd_timer_user *tu;
tu = file->private_data;
- snd_assert(tu->timeri != NULL, return -ENXIO);
+ if (!tu->timeri)
+ return -EBADFD;
return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0;
}
@@ -1844,13 +1836,9 @@ static long snd_timer_user_ioctl(struct file *file, unsigned int cmd,
static int snd_timer_user_fasync(int fd, struct file * file, int on)
{
struct snd_timer_user *tu;
- int err;
tu = file->private_data;
- err = fasync_helper(fd, file, on, &tu->fasync);
- if (err < 0)
- return err;
- return 0;
+ return fasync_helper(fd, file, on, &tu->fasync);
}
static ssize_t snd_timer_user_read(struct file *file, char __user *buffer,
@@ -1941,12 +1929,13 @@ static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait)
#define snd_timer_user_ioctl_compat NULL
#endif
-static struct file_operations snd_timer_f_ops =
+static const struct file_operations snd_timer_f_ops =
{
.owner = THIS_MODULE,
.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,
@@ -1967,12 +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;
}
@@ -1985,7 +1972,7 @@ static void __exit alsa_timer_exit(void)
/* unregister the system timer */
list_for_each_safe(p, n, &snd_timer_list) {
struct snd_timer *timer = list_entry(p, struct snd_timer, device_list);
- snd_timer_unregister(timer);
+ snd_timer_free(timer);
}
snd_timer_proc_done();
#ifdef SNDRV_OSS_INFO_DEV_TIMERS
@@ -2008,5 +1995,4 @@ EXPORT_SYMBOL(snd_timer_notify);
EXPORT_SYMBOL(snd_timer_global_new);
EXPORT_SYMBOL(snd_timer_global_free);
EXPORT_SYMBOL(snd_timer_global_register);
-EXPORT_SYMBOL(snd_timer_global_unregister);
EXPORT_SYMBOL(snd_timer_interrupt);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 11:35:37 +0000