[ALSA] semaphore -> mutex (core part)

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / core / timer.c

diff --git a/sound/core/timer.c b/sound/core/timer.c
index 2425b971b240b01387a00f0cb0b3df08b51941bb..cdeeb639b675a3e35a532b68a90443fced7e49f7 100644 (file)
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -25,6 +25,7 @@
 #include <linux/smp_lock.h>
 #include <linux/slab.h>
 #include <linux/time.h>
+#include <linux/mutex.h>
 #include <linux/moduleparam.h>
 #include <linux/string.h>
 #include <sound/core.h>
@@ -70,7 +71,7 @@ struct snd_timer_user {
        struct timespec tstamp;         /* trigger tstamp */
        wait_queue_head_t qchange_sleep;
        struct fasync_struct *fasync;
-       struct semaphore tread_sem;
+       struct mutex tread_sem;
 };
 
 /* list of timers */
@@ -82,7 +83,7 @@ static LIST_HEAD(snd_timer_slave_list);
 /* lock for slave active lists */
 static DEFINE_SPINLOCK(slave_active_lock);
 
-static DECLARE_MUTEX(register_mutex);
+static DEFINE_MUTEX(register_mutex);
 
 static int snd_timer_free(struct snd_timer *timer);
 static int snd_timer_dev_free(struct snd_device *device);
@@ -252,10 +253,10 @@ int snd_timer_open(struct snd_timer_instance **ti,
                        snd_printd("invalid slave class %i\n", tid->dev_sclass);
                        return -EINVAL;
                }
-               down(&register_mutex);
+               mutex_lock(&register_mutex);
                timeri = snd_timer_instance_new(owner, NULL);
                if (!timeri) {
-                       up(&register_mutex);
+                       mutex_unlock(&register_mutex);
                        return -ENOMEM;
                }
                timeri->slave_class = tid->dev_sclass;
@@ -263,37 +264,37 @@ int snd_timer_open(struct snd_timer_instance **ti,
                timeri->flags |= SNDRV_TIMER_IFLG_SLAVE;
                list_add_tail(&timeri->open_list, &snd_timer_slave_list);
                snd_timer_check_slave(timeri);
-               up(&register_mutex);
+               mutex_unlock(&register_mutex);
                *ti = timeri;
                return 0;
        }
 
        /* open a master instance */
-       down(&register_mutex);
+       mutex_lock(&register_mutex);
        timer = snd_timer_find(tid);
 #ifdef CONFIG_KMOD
        if (timer == NULL) {
-               up(&register_mutex);
+               mutex_unlock(&register_mutex);
                snd_timer_request(tid);
-               down(&register_mutex);
+               mutex_lock(&register_mutex);
                timer = snd_timer_find(tid);
        }
 #endif
        if (!timer) {
-               up(&register_mutex);
+               mutex_unlock(&register_mutex);
                return -ENODEV;
        }
        if (!list_empty(&timer->open_list_head)) {
                timeri = list_entry(timer->open_list_head.next,
                                    struct snd_timer_instance, open_list);
                if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) {
-                       up(&register_mutex);
+                       mutex_unlock(&register_mutex);
                        return -EBUSY;
                }
        }
        timeri = snd_timer_instance_new(owner, timer);
        if (!timeri) {
-               up(&register_mutex);
+               mutex_unlock(&register_mutex);
                return -ENOMEM;
        }
        timeri->slave_class = tid->dev_sclass;
@@ -302,7 +303,7 @@ int snd_timer_open(struct snd_timer_instance **ti,
                timer->hw.open(timer);
        list_add_tail(&timeri->open_list, &timer->open_list_head);
        snd_timer_check_master(timeri);
-       up(&register_mutex);
+       mutex_unlock(&register_mutex);
        *ti = timeri;
        return 0;
 }
@@ -333,9 +334,9 @@ int snd_timer_close(struct snd_timer_instance *timeri)
                        spin_lock_irq(&slave_active_lock);
                }
                spin_unlock_irq(&slave_active_lock);
-               down(&register_mutex);
+               mutex_lock(&register_mutex);
                list_del(&timeri->open_list);
-               up(&register_mutex);
+               mutex_unlock(&register_mutex);
        } else {
                timer = timeri->timer;
                /* wait, until the active callback is finished */
@@ -346,7 +347,7 @@ int snd_timer_close(struct snd_timer_instance *timeri)
                        spin_lock_irq(&timer->lock);
                }
                spin_unlock_irq(&timer->lock);
-               down(&register_mutex);
+               mutex_lock(&register_mutex);
                list_del(&timeri->open_list);
                if (timer && list_empty(&timer->open_list_head) &&
                    timer->hw.close)
@@ -362,7 +363,7 @@ int snd_timer_close(struct snd_timer_instance *timeri)
                        slave->timer = NULL;
                        spin_unlock_irq(&slave_active_lock);
                }
-               up(&register_mutex);
+               mutex_unlock(&register_mutex);
        }
        if (timeri->private_free)
                timeri->private_free(timeri);
@@ -835,7 +836,7 @@ static int snd_timer_dev_register(struct snd_device *dev)
            !timer->hw.resolution && timer->hw.c_resolution == NULL)
                return -EINVAL;
 
-       down(&register_mutex);
+       mutex_lock(&register_mutex);
        list_for_each(p, &snd_timer_list) {
                timer1 = list_entry(p, struct snd_timer, device_list);
                if (timer1->tmr_class > timer->tmr_class)
@@ -857,11 +858,11 @@ static int snd_timer_dev_register(struct snd_device *dev)
                if (timer1->tmr_subdevice < timer->tmr_subdevice)
                        continue;
                /* conflicts.. */
-               up(&register_mutex);
+               mutex_unlock(&register_mutex);
                return -EBUSY;
        }
        list_add_tail(&timer->device_list, p);
-       up(&register_mutex);
+       mutex_unlock(&register_mutex);
        return 0;
 }
 
@@ -871,7 +872,7 @@ static int snd_timer_unregister(struct snd_timer *timer)
        struct snd_timer_instance *ti;
 
        snd_assert(timer != NULL, return -ENXIO);
-       down(&register_mutex);
+       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) {
@@ -881,7 +882,7 @@ static int snd_timer_unregister(struct snd_timer *timer)
                }
        }
        list_del(&timer->device_list);
-       up(&register_mutex);
+       mutex_unlock(&register_mutex);
        return snd_timer_free(timer);
 }
 
@@ -1065,7 +1066,7 @@ static void snd_timer_proc_read(struct snd_info_entry *entry,
        struct snd_timer_instance *ti;
        struct list_head *p, *q;
 
-       down(&register_mutex);
+       mutex_lock(&register_mutex);
        list_for_each(p, &snd_timer_list) {
                timer = list_entry(p, struct snd_timer, device_list);
                switch (timer->tmr_class) {
@@ -1105,7 +1106,7 @@ static void snd_timer_proc_read(struct snd_info_entry *entry,
                }
                spin_unlock_irqrestore(&timer->lock, flags);
        }
-       up(&register_mutex);
+       mutex_unlock(&register_mutex);
 }
 
 static struct snd_info_entry *snd_timer_proc_entry = NULL;
@@ -1269,7 +1270,7 @@ static int snd_timer_user_open(struct inode *inode, struct file *file)
                return -ENOMEM;
        spin_lock_init(&tu->qlock);
        init_waitqueue_head(&tu->qchange_sleep);
-       init_MUTEX(&tu->tread_sem);
+       mutex_init(&tu->tread_sem);
        tu->ticks = 1;
        tu->queue_size = 128;
        tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read),
@@ -1325,7 +1326,7 @@ static int snd_timer_user_next_device(struct snd_timer_id __user *_tid)
 
        if (copy_from_user(&id, _tid, sizeof(id)))
                return -EFAULT;
-       down(&register_mutex);
+       mutex_lock(&register_mutex);
        if (id.dev_class < 0) {         /* first item */
                if (list_empty(&snd_timer_list))
                        snd_timer_user_zero_id(&id);
@@ -1407,7 +1408,7 @@ static int snd_timer_user_next_device(struct snd_timer_id __user *_tid)
                        snd_timer_user_zero_id(&id);
                }
        }
-       up(&register_mutex);
+       mutex_unlock(&register_mutex);
        if (copy_to_user(_tid, &id, sizeof(*_tid)))
                return -EFAULT;
        return 0;
@@ -1432,7 +1433,7 @@ static int snd_timer_user_ginfo(struct file *file,
        tid = ginfo->tid;
        memset(ginfo, 0, sizeof(*ginfo));
        ginfo->tid = tid;
-       down(&register_mutex);
+       mutex_lock(&register_mutex);
        t = snd_timer_find(&tid);
        if (t != NULL) {
                ginfo->card = t->card ? t->card->number : -1;
@@ -1451,7 +1452,7 @@ static int snd_timer_user_ginfo(struct file *file,
        } else {
                err = -ENODEV;
        }
-       up(&register_mutex);
+       mutex_unlock(&register_mutex);
        if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo)))
                err = -EFAULT;
        kfree(ginfo);
@@ -1467,7 +1468,7 @@ static int snd_timer_user_gparams(struct file *file,
 
        if (copy_from_user(&gparams, _gparams, sizeof(gparams)))
                return -EFAULT;
-       down(&register_mutex);
+       mutex_lock(&register_mutex);
        t = snd_timer_find(&gparams.tid);
        if (!t) {
                err = -ENODEV;
@@ -1483,7 +1484,7 @@ static int snd_timer_user_gparams(struct file *file,
        }
        err = t->hw.set_period(t, gparams.period_num, gparams.period_den);
 _error:
-       up(&register_mutex);
+       mutex_unlock(&register_mutex);
        return err;
 }
 
@@ -1500,7 +1501,7 @@ static int snd_timer_user_gstatus(struct file *file,
        tid = gstatus.tid;
        memset(&gstatus, 0, sizeof(gstatus));
        gstatus.tid = tid;
-       down(&register_mutex);
+       mutex_lock(&register_mutex);
        t = snd_timer_find(&tid);
        if (t != NULL) {
                if (t->hw.c_resolution)
@@ -1517,7 +1518,7 @@ static int snd_timer_user_gstatus(struct file *file,
        } else {
                err = -ENODEV;
        }
-       up(&register_mutex);
+       mutex_unlock(&register_mutex);
        if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus)))
                err = -EFAULT;
        return err;
@@ -1532,7 +1533,7 @@ static int snd_timer_user_tselect(struct file *file,
        int err = 0;
 
        tu = file->private_data;
-       down(&tu->tread_sem);
+       mutex_lock(&tu->tread_sem);
        if (tu->timeri) {
                snd_timer_close(tu->timeri);
                tu->timeri = NULL;
@@ -1576,7 +1577,7 @@ static int snd_timer_user_tselect(struct file *file,
        }
 
       __err:
-       up(&tu->tread_sem);
+       mutex_unlock(&tu->tread_sem);
        return err;
 }
 
@@ -1797,17 +1798,17 @@ static long snd_timer_user_ioctl(struct file *file, unsigned int cmd,
        {
                int xarg;
 
-               down(&tu->tread_sem);
+               mutex_lock(&tu->tread_sem);
                if (tu->timeri) {       /* too late */
-                       up(&tu->tread_sem);
+                       mutex_unlock(&tu->tread_sem);
                        return -EBUSY;
                }
                if (get_user(xarg, p)) {
-                       up(&tu->tread_sem);
+                       mutex_unlock(&tu->tread_sem);
                        return -EFAULT;
                }
                tu->tread = xarg ? 1 : 0;
-               up(&tu->tread_sem);
+               mutex_unlock(&tu->tread_sem);
                return 0;
        }
        case SNDRV_TIMER_IOCTL_GINFO: