diff options
Diffstat (limited to 'sound/core/timer.c')
| -rw-r--r-- | sound/core/timer.c | 279 |
1 files changed, 167 insertions, 112 deletions
diff --git a/sound/core/timer.c b/sound/core/timer.c index 488c28a..1b90a38 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -55,7 +55,7 @@ MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); typedef struct { snd_timer_instance_t *timeri; - int tread; /* enhanced read with timestamps and events */ + int tread; /* enhanced read with timestamps and events */ unsigned long ticks; unsigned long overrun; int qhead; @@ -95,7 +95,8 @@ static void snd_timer_reschedule(snd_timer_t * timer, unsigned long ticks_left); * create a timer instance with the given owner string. * when timer is not NULL, increments the module counter */ -static snd_timer_instance_t *snd_timer_instance_new(char *owner, snd_timer_t *timer) +static snd_timer_instance_t *snd_timer_instance_new(char *owner, + snd_timer_t *timer) { snd_timer_instance_t *timeri; timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); @@ -192,7 +193,8 @@ static void snd_timer_check_slave(snd_timer_instance_t *slave) 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_add_tail(&slave->open_list, + &master->slave_list_head); spin_lock_irq(&slave_active_lock); slave->master = master; slave->timer = master->timer; @@ -225,7 +227,8 @@ static void snd_timer_check_master(snd_timer_instance_t *master) slave->master = master; slave->timer = master->timer; if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) - list_add_tail(&slave->active_list, &master->slave_active_head); + list_add_tail(&slave->active_list, + &master->slave_active_head); spin_unlock_irq(&slave_active_lock); } } @@ -241,7 +244,7 @@ int snd_timer_open(snd_timer_instance_t **ti, { snd_timer_t *timer; snd_timer_instance_t *timeri = NULL; - + if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { /* open a slave instance */ if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || @@ -304,7 +307,8 @@ int snd_timer_open(snd_timer_instance_t **ti, return 0; } -static int _snd_timer_stop(snd_timer_instance_t * timeri, int keep_flag, enum sndrv_timer_event event); +static int _snd_timer_stop(snd_timer_instance_t * timeri, + int keep_flag, enum sndrv_timer_event event); /* * close a timer instance @@ -344,7 +348,8 @@ int snd_timer_close(snd_timer_instance_t * timeri) spin_unlock_irq(&timer->lock); down(®ister_mutex); list_del(&timeri->open_list); - if (timer && list_empty(&timer->open_list_head) && timer->hw.close) + if (timer && list_empty(&timer->open_list_head) && + timer->hw.close) timer->hw.close(timer); /* remove slave links */ list_for_each_safe(p, n, &timeri->slave_list_head) { @@ -382,7 +387,8 @@ unsigned long snd_timer_resolution(snd_timer_instance_t * timeri) return 0; } -static void snd_timer_notify1(snd_timer_instance_t *ti, enum sndrv_timer_event event) +static void snd_timer_notify1(snd_timer_instance_t *ti, + enum sndrv_timer_event event) { snd_timer_t *timer; unsigned long flags; @@ -392,8 +398,10 @@ static void snd_timer_notify1(snd_timer_instance_t *ti, enum sndrv_timer_event e struct timespec tstamp; getnstimeofday(&tstamp); - snd_assert(event >= SNDRV_TIMER_EVENT_START && event <= SNDRV_TIMER_EVENT_PAUSE, return); - if (event == SNDRV_TIMER_EVENT_START || event == SNDRV_TIMER_EVENT_CONTINUE) + snd_assert(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); @@ -413,7 +421,8 @@ static void snd_timer_notify1(snd_timer_instance_t *ti, enum sndrv_timer_event e spin_unlock_irqrestore(&timer->lock, flags); } -static int snd_timer_start1(snd_timer_t *timer, snd_timer_instance_t *timeri, unsigned long sticks) +static int snd_timer_start1(snd_timer_t *timer, snd_timer_instance_t *timeri, + unsigned long sticks) { list_del(&timeri->active_list); list_add_tail(&timeri->active_list, &timer->active_list_head); @@ -440,14 +449,15 @@ static int snd_timer_start_slave(snd_timer_instance_t *timeri) spin_lock_irqsave(&slave_active_lock, flags); timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; if (timeri->master) - list_add_tail(&timeri->active_list, &timeri->master->slave_active_head); + list_add_tail(&timeri->active_list, + &timeri->master->slave_active_head); spin_unlock_irqrestore(&slave_active_lock, flags); return 1; /* delayed start */ } /* * start the timer instance - */ + */ int snd_timer_start(snd_timer_instance_t * timeri, unsigned int ticks) { snd_timer_t *timer; @@ -473,7 +483,8 @@ int snd_timer_start(snd_timer_instance_t * timeri, unsigned int ticks) return result; } -static int _snd_timer_stop(snd_timer_instance_t * timeri, int keep_flag, enum sndrv_timer_event event) +static int _snd_timer_stop(snd_timer_instance_t * timeri, + int keep_flag, enum sndrv_timer_event event) { snd_timer_t *timer; unsigned long flags; @@ -507,7 +518,8 @@ static int _snd_timer_stop(snd_timer_instance_t * timeri, int keep_flag, enum sn } } if (!keep_flag) - timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING|SNDRV_TIMER_IFLG_START); + timeri->flags &= + ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); spin_unlock_irqrestore(&timer->lock, flags); __end: if (event != SNDRV_TIMER_EVENT_RESOLUTION) @@ -625,7 +637,7 @@ static void snd_timer_tasklet(unsigned long arg) /* remove from ack_list and make empty */ list_del_init(p); - + ticks = ti->pticks; ti->pticks = 0; resolution = ti->resolution; @@ -650,7 +662,7 @@ void snd_timer_interrupt(snd_timer_t * timer, unsigned long ticks_left) { snd_timer_instance_t *ti, *ts; unsigned long resolution, ticks; - struct list_head *p, *q, *n; + struct list_head *p, *q, *n, *ack_list_head; int use_tasklet = 0; if (timer == NULL) @@ -665,8 +677,9 @@ void snd_timer_interrupt(snd_timer_t * 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 processed - * instance is relinked to done_list_head before callback is called. + * Here we cannot use list_for_each 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, snd_timer_instance_t, active_list); @@ -687,26 +700,19 @@ void snd_timer_interrupt(snd_timer_t * timer, unsigned long ticks_left) if (--timer->running) list_del(p); } - if (list_empty(&ti->ack_list)) { - if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || - (ti->flags & SNDRV_TIMER_IFLG_FAST)) { - list_add_tail(&ti->ack_list, &timer->ack_list_head); - } else { - list_add_tail(&ti->ack_list, &timer->sack_list_head); - } - } + if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || + (ti->flags & SNDRV_TIMER_IFLG_FAST)) + ack_list_head = &timer->ack_list_head; + else + 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, snd_timer_instance_t, active_list); ts->pticks = ti->pticks; ts->resolution = resolution; - if (list_empty(&ts->ack_list)) { - if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || - (ti->flags & SNDRV_TIMER_IFLG_FAST)) { - list_add_tail(&ts->ack_list, &timer->ack_list_head); - } else { - list_add_tail(&ts->ack_list, &timer->sack_list_head); - } - } + if (list_empty(&ts->ack_list)) + list_add_tail(&ts->ack_list, ack_list_head); } } if (timer->flags & SNDRV_TIMER_FLG_RESCHED) @@ -730,10 +736,10 @@ void snd_timer_interrupt(snd_timer_t * timer, unsigned long ticks_left) while (!list_empty(&timer->ack_list_head)) { p = timer->ack_list_head.next; /* get first item */ ti = list_entry(p, snd_timer_instance_t, ack_list); - + /* remove from ack_list and make empty */ list_del_init(p); - + ticks = ti->pticks; ti->pticks = 0; @@ -757,7 +763,8 @@ void snd_timer_interrupt(snd_timer_t * timer, unsigned long ticks_left) */ -int snd_timer_new(snd_card_t *card, char *id, snd_timer_id_t *tid, snd_timer_t ** rtimer) +int snd_timer_new(snd_card_t *card, char *id, snd_timer_id_t *tid, + snd_timer_t **rtimer) { snd_timer_t *timer; int err; @@ -785,10 +792,12 @@ int snd_timer_new(snd_card_t *card, char *id, snd_timer_id_t *tid, snd_timer_t * INIT_LIST_HEAD(&timer->ack_list_head); INIT_LIST_HEAD(&timer->sack_list_head); spin_lock_init(&timer->lock); - tasklet_init(&timer->task_queue, snd_timer_tasklet, (unsigned long)timer); + tasklet_init(&timer->task_queue, snd_timer_tasklet, + (unsigned long)timer); if (card != NULL) { timer->module = card->module; - if ((err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops)) < 0) { + err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); + if (err < 0) { snd_timer_free(timer); return err; } @@ -818,7 +827,8 @@ static int snd_timer_dev_register(snd_device_t *dev) snd_timer_t *timer1; struct list_head *p; - snd_assert(timer != NULL && timer->hw.start != NULL && timer->hw.stop != NULL, return -ENXIO); + snd_assert(timer != NULL && timer->hw.start != NULL && + timer->hw.stop != NULL, return -ENXIO); if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && !timer->hw.resolution && timer->hw.c_resolution == NULL) return -EINVAL; @@ -879,7 +889,8 @@ static int snd_timer_dev_unregister(snd_device_t *device) return snd_timer_unregister(timer); } -void snd_timer_notify(snd_timer_t *timer, enum sndrv_timer_event event, struct timespec *tstamp) +void snd_timer_notify(snd_timer_t *timer, enum sndrv_timer_event event, + struct timespec *tstamp) { unsigned long flags; unsigned long resolution = 0; @@ -888,7 +899,8 @@ void snd_timer_notify(snd_timer_t *timer, enum sndrv_timer_event event, struct t if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) return; - snd_assert(event >= SNDRV_TIMER_EVENT_MSTART && event <= SNDRV_TIMER_EVENT_MRESUME, return); + snd_assert(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 || @@ -917,7 +929,7 @@ void snd_timer_notify(snd_timer_t *timer, enum sndrv_timer_event event, struct t int snd_timer_global_new(char *id, int device, snd_timer_t **rtimer) { snd_timer_id_t tid; - + tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; tid.card = -1; @@ -945,7 +957,7 @@ int snd_timer_global_unregister(snd_timer_t *timer) return snd_timer_unregister(timer); } -/* +/* * System timer */ @@ -1021,7 +1033,8 @@ static int snd_timer_register_system(void) struct snd_timer_system_private *priv; int err; - if ((err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer)) < 0) + err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); + if (err < 0) return err; strcpy(timer->name, "system timer"); timer->hw = snd_timer_system; @@ -1058,27 +1071,35 @@ static void snd_timer_proc_read(snd_info_entry_t *entry, snd_iprintf(buffer, "G%i: ", timer->tmr_device); break; case SNDRV_TIMER_CLASS_CARD: - snd_iprintf(buffer, "C%i-%i: ", timer->card->number, timer->tmr_device); + snd_iprintf(buffer, "C%i-%i: ", + timer->card->number, timer->tmr_device); break; case SNDRV_TIMER_CLASS_PCM: - snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, timer->tmr_device, timer->tmr_subdevice); + snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, + timer->tmr_device, timer->tmr_subdevice); break; default: - snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, timer->card ? timer->card->number : -1, timer->tmr_device, timer->tmr_subdevice); + snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, + timer->card ? timer->card->number : -1, + timer->tmr_device, timer->tmr_subdevice); } snd_iprintf(buffer, "%s :", timer->name); if (timer->hw.resolution) - snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", timer->hw.resolution / 1000, timer->hw.resolution % 1000, timer->hw.ticks); + snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", + timer->hw.resolution / 1000, + timer->hw.resolution % 1000, + timer->hw.ticks); 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, snd_timer_instance_t, open_list); - snd_iprintf(buffer, " Client %s : %s : lost interrupts %li\n", - ti->owner ? ti->owner : "unknown", - ti->flags & (SNDRV_TIMER_IFLG_START|SNDRV_TIMER_IFLG_RUNNING) ? "running" : "stopped", - ti->lost); + 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); } @@ -1096,7 +1117,7 @@ static void snd_timer_user_interrupt(snd_timer_instance_t *timeri, snd_timer_user_t *tu = timeri->callback_data; snd_timer_read_t *r; int prev; - + spin_lock(&tu->qlock); if (tu->qused > 0) { prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; @@ -1121,7 +1142,8 @@ static void snd_timer_user_interrupt(snd_timer_instance_t *timeri, wake_up(&tu->qchange_sleep); } -static void snd_timer_user_append_to_tqueue(snd_timer_user_t *tu, snd_timer_tread_t *tread) +static void snd_timer_user_append_to_tqueue(snd_timer_user_t *tu, + snd_timer_tread_t *tread) { if (tu->qused >= tu->queue_size) { tu->overrun++; @@ -1140,7 +1162,8 @@ static void snd_timer_user_ccallback(snd_timer_instance_t *timeri, snd_timer_user_t *tu = timeri->callback_data; snd_timer_tread_t r1; - if (event >= SNDRV_TIMER_EVENT_START && event <= SNDRV_TIMER_EVENT_PAUSE) + if (event >= SNDRV_TIMER_EVENT_START && + event <= SNDRV_TIMER_EVENT_PAUSE) tu->tstamp = *tstamp; if ((tu->filter & (1 << event)) == 0 || !tu->tread) return; @@ -1165,13 +1188,15 @@ static void snd_timer_user_tinterrupt(snd_timer_instance_t *timeri, memset(&tstamp, 0, sizeof(tstamp)); spin_lock(&tu->qlock); - if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION)|(1 << SNDRV_TIMER_EVENT_TICK))) == 0) { + if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | + (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { spin_unlock(&tu->qlock); return; } if (tu->last_resolution != resolution || ticks > 0) getnstimeofday(&tstamp); - if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && tu->last_resolution != resolution) { + if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && + tu->last_resolution != resolution) { r1.event = SNDRV_TIMER_EVENT_RESOLUTION; r1.tstamp = tstamp; r1.val = resolution; @@ -1209,7 +1234,7 @@ static void snd_timer_user_tinterrupt(snd_timer_instance_t *timeri, static int snd_timer_user_open(struct inode *inode, struct file *file) { snd_timer_user_t *tu; - + tu = kzalloc(sizeof(*tu), GFP_KERNEL); if (tu == NULL) return -ENOMEM; @@ -1218,7 +1243,8 @@ static int snd_timer_user_open(struct inode *inode, struct file *file) init_MUTEX(&tu->tread_sem); tu->ticks = 1; tu->queue_size = 128; - tu->queue = (snd_timer_read_t *)kmalloc(tu->queue_size * sizeof(snd_timer_read_t), GFP_KERNEL); + tu->queue = kmalloc(tu->queue_size * sizeof(snd_timer_read_t), + GFP_KERNEL); if (tu->queue == NULL) { kfree(tu); return -ENOMEM; @@ -1267,7 +1293,7 @@ static int snd_timer_user_next_device(snd_timer_id_t __user *_tid) snd_timer_id_t id; snd_timer_t *timer; struct list_head *p; - + if (copy_from_user(&id, _tid, sizeof(id))) return -EFAULT; down(®ister_mutex); @@ -1308,7 +1334,11 @@ static int snd_timer_user_next_device(snd_timer_id_t __user *_tid) if (id.device < 0) { id.device = 0; } else { - id.subdevice = id.subdevice < 0 ? 0 : id.subdevice + 1; + if (id.subdevice < 0) { + id.subdevice = 0; + } else { + id.subdevice++; + } } } } @@ -1352,9 +1382,10 @@ static int snd_timer_user_next_device(snd_timer_id_t __user *_tid) if (copy_to_user(_tid, &id, sizeof(*_tid))) return -EFAULT; return 0; -} +} -static int snd_timer_user_ginfo(struct file *file, snd_timer_ginfo_t __user *_ginfo) +static int snd_timer_user_ginfo(struct file *file, + snd_timer_ginfo_t __user *_ginfo) { snd_timer_ginfo_t *ginfo; snd_timer_id_t tid; @@ -1398,7 +1429,8 @@ static int snd_timer_user_ginfo(struct file *file, snd_timer_ginfo_t __user *_gi return err; } -static int snd_timer_user_gparams(struct file *file, snd_timer_gparams_t __user *_gparams) +static int snd_timer_user_gparams(struct file *file, + snd_timer_gparams_t __user *_gparams) { snd_timer_gparams_t gparams; snd_timer_t *t; @@ -1408,23 +1440,26 @@ static int snd_timer_user_gparams(struct file *file, snd_timer_gparams_t __user return -EFAULT; down(®ister_mutex); t = snd_timer_find(&gparams.tid); - if (t != NULL) { - if (list_empty(&t->open_list_head)) { - if (t->hw.set_period) - err = t->hw.set_period(t, gparams.period_num, gparams.period_den); - else - err = -ENOSYS; - } else { - err = -EBUSY; - } - } else { + if (!t) { err = -ENODEV; + goto _error; + } + if (!list_empty(&t->open_list_head)) { + err = -EBUSY; + goto _error; + } + if (!t->hw.set_period) { + err = -ENOSYS; + goto _error; } + err = t->hw.set_period(t, gparams.period_num, gparams.period_den); +_error: up(®ister_mutex); return err; } -static int snd_timer_user_gstatus(struct file *file, snd_timer_gstatus_t __user *_gstatus) +static int snd_timer_user_gstatus(struct file *file, + snd_timer_gstatus_t __user *_gstatus) { snd_timer_gstatus_t gstatus; snd_timer_id_t tid; @@ -1444,7 +1479,8 @@ static int snd_timer_user_gstatus(struct file *file, snd_timer_gstatus_t __user else gstatus.resolution = t->hw.resolution; if (t->hw.precise_resolution) { - t->hw.precise_resolution(t, &gstatus.resolution_num, &gstatus.resolution_den); + t->hw.precise_resolution(t, &gstatus.resolution_num, + &gstatus.resolution_den); } else { gstatus.resolution_num = gstatus.resolution; gstatus.resolution_den = 1000000000uL; @@ -1458,13 +1494,14 @@ static int snd_timer_user_gstatus(struct file *file, snd_timer_gstatus_t __user return err; } -static int snd_timer_user_tselect(struct file *file, snd_timer_select_t __user *_tselect) +static int snd_timer_user_tselect(struct file *file, + snd_timer_select_t __user *_tselect) { snd_timer_user_t *tu; snd_timer_select_t tselect; char str[32]; int err = 0; - + tu = file->private_data; down(&tu->tread_sem); if (tu->timeri) { @@ -1478,7 +1515,8 @@ static int snd_timer_user_tselect(struct file *file, snd_timer_select_t __user * sprintf(str, "application %i", current->pid); if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; - if ((err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid)) < 0) + err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); + if (err < 0) goto __err; kfree(tu->queue); @@ -1486,21 +1524,24 @@ static int snd_timer_user_tselect(struct file *file, snd_timer_select_t __user * kfree(tu->tqueue); tu->tqueue = NULL; if (tu->tread) { - tu->tqueue = (snd_timer_tread_t *)kmalloc(tu->queue_size * sizeof(snd_timer_tread_t), GFP_KERNEL); + tu->tqueue = kmalloc(tu->queue_size * sizeof(snd_timer_tread_t), + GFP_KERNEL); if (tu->tqueue == NULL) err = -ENOMEM; } else { - tu->queue = (snd_timer_read_t *)kmalloc(tu->queue_size * sizeof(snd_timer_read_t), GFP_KERNEL); + tu->queue = kmalloc(tu->queue_size * sizeof(snd_timer_read_t), + GFP_KERNEL); if (tu->queue == NULL) err = -ENOMEM; } - + if (err < 0) { snd_timer_close(tu->timeri); tu->timeri = NULL; } else { tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; - tu->timeri->callback = tu->tread ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; + tu->timeri->callback = tu->tread + ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; tu->timeri->ccallback = snd_timer_user_ccallback; tu->timeri->callback_data = (void *)tu; } @@ -1510,7 +1551,8 @@ static int snd_timer_user_tselect(struct file *file, snd_timer_select_t __user * return err; } -static int snd_timer_user_info(struct file *file, snd_timer_info_t __user *_info) +static int snd_timer_user_info(struct file *file, + snd_timer_info_t __user *_info) { snd_timer_user_t *tu; snd_timer_info_t *info; @@ -1537,7 +1579,8 @@ static int snd_timer_user_info(struct file *file, snd_timer_info_t __user *_info return err; } -static int snd_timer_user_params(struct file *file, snd_timer_params_t __user *_params) +static int snd_timer_user_params(struct file *file, + snd_timer_params_t __user *_params) { snd_timer_user_t *tu; snd_timer_params_t params; @@ -1545,7 +1588,7 @@ static int snd_timer_user_params(struct file *file, snd_timer_params_t __user *_ snd_timer_read_t *tr; snd_timer_tread_t *ttr; int err; - + tu = file->private_data; snd_assert(tu->timeri != NULL, return -ENXIO); t = tu->timeri->timer; @@ -1556,7 +1599,8 @@ static int snd_timer_user_params(struct file *file, snd_timer_params_t __user *_ err = -EINVAL; goto _end; } - if (params.queue_size > 0 && (params.queue_size < 32 || params.queue_size > 1024)) { + if (params.queue_size > 0 && + (params.queue_size < 32 || params.queue_size > 1024)) { err = -EINVAL; goto _end; } @@ -1589,16 +1633,19 @@ static int snd_timer_user_params(struct file *file, snd_timer_params_t __user *_ if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; spin_unlock_irq(&t->lock); - if (params.queue_size > 0 && (unsigned int)tu->queue_size != params.queue_size) { + if (params.queue_size > 0 && + (unsigned int)tu->queue_size != params.queue_size) { if (tu->tread) { - ttr = (snd_timer_tread_t *)kmalloc(params.queue_size * sizeof(snd_timer_tread_t), GFP_KERNEL); + ttr = kmalloc(params.queue_size * sizeof(*ttr), + GFP_KERNEL); if (ttr) { kfree(tu->tqueue); tu->queue_size = params.queue_size; tu->tqueue = ttr; } } else { - tr = (snd_timer_read_t *)kmalloc(params.queue_size * sizeof(snd_timer_read_t), GFP_KERNEL); + tr = kmalloc(params.queue_size * sizeof(*tr), + GFP_KERNEL); if (tr) { kfree(tu->queue); tu->queue_size = params.queue_size; @@ -1622,7 +1669,6 @@ static int snd_timer_user_params(struct file *file, snd_timer_params_t __user *_ tu->qused++; tu->qtail++; } - } tu->filter = params.filter; tu->ticks = params.ticks; @@ -1633,11 +1679,12 @@ static int snd_timer_user_params(struct file *file, snd_timer_params_t __user *_ return err; } -static int snd_timer_user_status(struct file *file, snd_timer_status_t __user *_status) +static int snd_timer_user_status(struct file *file, + snd_timer_status_t __user *_status) { snd_timer_user_t *tu; snd_timer_status_t status; - + tu = file->private_data; snd_assert(tu->timeri != NULL, return -ENXIO); memset(&status, 0, sizeof(status)); @@ -1657,7 +1704,7 @@ static int snd_timer_user_start(struct file *file) { int err; snd_timer_user_t *tu; - + tu = file->private_data; snd_assert(tu->timeri != NULL, return -ENXIO); snd_timer_stop(tu->timeri); @@ -1670,7 +1717,7 @@ static int snd_timer_user_stop(struct file *file) { int err; snd_timer_user_t *tu; - + tu = file->private_data; snd_assert(tu->timeri != NULL, return -ENXIO); return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; @@ -1680,7 +1727,7 @@ static int snd_timer_user_continue(struct file *file) { int err; snd_timer_user_t *tu; - + tu = file->private_data; snd_assert(tu->timeri != NULL, return -ENXIO); tu->timeri->lost = 0; @@ -1691,7 +1738,7 @@ static int snd_timer_user_pause(struct file *file) { int err; snd_timer_user_t *tu; - + tu = file->private_data; snd_assert(tu->timeri != NULL, return -ENXIO); return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; @@ -1704,12 +1751,13 @@ enum { SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), }; -static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) { snd_timer_user_t *tu; void __user *argp = (void __user *)arg; int __user *p = argp; - + tu = file->private_data; switch (cmd) { case SNDRV_TIMER_IOCTL_PVERSION: @@ -1719,7 +1767,7 @@ static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, unsigned l case SNDRV_TIMER_IOCTL_TREAD: { int xarg; - + down(&tu->tread_sem); if (tu->timeri) { /* too late */ up(&tu->tread_sem); @@ -1767,7 +1815,7 @@ static int snd_timer_user_fasync(int fd, struct file * file, int on) { snd_timer_user_t *tu; int err; - + tu = file->private_data; err = fasync_helper(fd, file, on, &tu->fasync); if (err < 0) @@ -1775,12 +1823,13 @@ static int snd_timer_user_fasync(int fd, struct file * file, int on) return 0; } -static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, size_t count, loff_t *offset) +static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, + size_t count, loff_t *offset) { snd_timer_user_t *tu; long result = 0, unit; int err = 0; - + tu = file->private_data; unit = tu->tread ? sizeof(snd_timer_tread_t) : sizeof(snd_timer_read_t); spin_lock_irq(&tu->qlock); @@ -1814,12 +1863,14 @@ static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, size_ goto _error; if (tu->tread) { - if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], sizeof(snd_timer_tread_t))) { + if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], + sizeof(snd_timer_tread_t))) { err = -EFAULT; goto _error; } } else { - if (copy_to_user(buffer, &tu->queue[tu->qhead++], sizeof(snd_timer_read_t))) { + if (copy_to_user(buffer, &tu->queue[tu->qhead++], + sizeof(snd_timer_read_t))) { err = -EFAULT; goto _error; } @@ -1846,7 +1897,7 @@ static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) tu = file->private_data; poll_wait(file, &tu->qchange_sleep, wait); - + mask = 0; if (tu->qused) mask |= POLLIN | POLLRDNORM; @@ -1890,9 +1941,11 @@ static int __init alsa_timer_init(void) snd_info_entry_t *entry; #ifdef SNDRV_OSS_INFO_DEV_TIMERS - snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, "system timer"); + snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, + "system timer"); #endif - if ((entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL)) != NULL) { + 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) { @@ -1902,10 +1955,12 @@ static int __init alsa_timer_init(void) } snd_timer_proc_entry = entry; if ((err = snd_timer_register_system()) < 0) - snd_printk(KERN_ERR "unable to register system timer (%i)\n", err); + snd_printk(KERN_ERR "unable to register system timer (%i)\n", + err); if ((err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, &snd_timer_reg, "timer"))<0) - snd_printk(KERN_ERR "unable to register timer device (%i)\n", err); + snd_printk(KERN_ERR "unable to register timer device (%i)\n", + err); return 0; } |
