From 05c1afe75fcebf456017ec186811cf1599f4360e Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 30 Oct 2007 11:59:15 +0100
Subject: [PATCH] [ALSA] opl3 - simplify exclusive access lock
Use the exclusive access lock in hwdep instead of the own one.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---
include/sound/opl3.h | 2 --
sound/drivers/opl3/opl3_lib.c | 2 +-
sound/drivers/opl3/opl3_seq.c | 19 +++++++++++--------
sound/drivers/opl3/opl3_synth.c | 14 --------------
4 files changed, 12 insertions(+), 25 deletions(-)
diff --git a/include/sound/opl3.h b/include/sound/opl3.h
index 7ee865d6236f..eea584b7bfc5 100644
--- a/include/sound/opl3.h
+++ b/include/sound/opl3.h
@@ -320,7 +320,6 @@ struct snd_opl3 {
spinlock_t reg_lock;
struct snd_card *card; /* The card that this belongs to */
- int used; /* usage flag - exclusive */
unsigned char fm_mode; /* OPL mode, see SNDRV_DM_FM_MODE_XXX */
unsigned char rhythm; /* percussion mode flag */
unsigned char max_voices; /* max number of voices */
@@ -353,7 +352,6 @@ struct snd_opl3 {
int sys_timer_status; /* system timer run status */
spinlock_t sys_timer_lock; /* Lock for system timer access */
#endif
- struct mutex access_mutex; /* locking */
};
/* opl3.c */
diff --git a/sound/drivers/opl3/opl3_lib.c b/sound/drivers/opl3/opl3_lib.c
index a657da922b4d..a1270841290b 100644
--- a/sound/drivers/opl3/opl3_lib.c
+++ b/sound/drivers/opl3/opl3_lib.c
@@ -361,7 +361,6 @@ int snd_opl3_new(struct snd_card *card,
opl3->hardware = hardware;
spin_lock_init(&opl3->reg_lock);
spin_lock_init(&opl3->timer_lock);
- mutex_init(&opl3->access_mutex);
if ((err = snd_device_new(card, SNDRV_DEV_CODEC, opl3, &ops)) < 0) {
snd_opl3_free(opl3);
@@ -497,6 +496,7 @@ int snd_opl3_hwdep_new(struct snd_opl3 * opl3,
return err;
}
hw->private_data = opl3;
+ hw->exclusive = 1;
#ifdef CONFIG_SND_OSSEMUL
if (device == 0) {
hw->oss_type = SNDRV_OSS_DEVICE_TYPE_DMFM;
diff --git a/sound/drivers/opl3/opl3_seq.c b/sound/drivers/opl3/opl3_seq.c
index ff6da16b9178..6fd60b7e5805 100644
--- a/sound/drivers/opl3/opl3_seq.c
+++ b/sound/drivers/opl3/opl3_seq.c
@@ -51,14 +51,15 @@ void snd_opl3_synth_use_dec(struct snd_opl3 * opl3)
int snd_opl3_synth_setup(struct snd_opl3 * opl3)
{
int idx;
+ struct snd_hwdep *hwdep = opl3->hwdep;
- mutex_lock(&opl3->access_mutex);
- if (opl3->used) {
- mutex_unlock(&opl3->access_mutex);
+ mutex_lock(&hwdep->open_mutex);
+ if (hwdep->used) {
+ mutex_unlock(&hwdep->open_mutex);
return -EBUSY;
}
- opl3->used++;
- mutex_unlock(&opl3->access_mutex);
+ hwdep->used++;
+ mutex_unlock(&hwdep->open_mutex);
snd_opl3_reset(opl3);
@@ -91,9 +92,11 @@ void snd_opl3_synth_cleanup(struct snd_opl3 * opl3)
spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
snd_opl3_reset(opl3);
- mutex_lock(&opl3->access_mutex);
- opl3->used--;
- mutex_unlock(&opl3->access_mutex);
+ hwdep = opl3->hwdep;
+ mutex_lock(&hwdep->open_mutex);
+ hwdep->used--;
+ mutex_unlock(&hwdep->open_mutex);
+ wake_up(&hwdep->open_wait);
}
static int snd_opl3_synth_use(void *private_data, struct snd_seq_port_subscribe * info)
diff --git a/sound/drivers/opl3/opl3_synth.c b/sound/drivers/opl3/opl3_synth.c
index d55eefce44c1..a7bf7a4b1f85 100644
--- a/sound/drivers/opl3/opl3_synth.c
+++ b/sound/drivers/opl3/opl3_synth.c
@@ -76,16 +76,6 @@ static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection);
*/
int snd_opl3_open(struct snd_hwdep * hw, struct file *file)
{
- struct snd_opl3 *opl3 = hw->private_data;
-
- mutex_lock(&opl3->access_mutex);
- if (opl3->used) {
- mutex_unlock(&opl3->access_mutex);
- return -EAGAIN;
- }
- opl3->used++;
- mutex_unlock(&opl3->access_mutex);
-
return 0;
}
@@ -185,10 +175,6 @@ int snd_opl3_release(struct snd_hwdep * hw, struct file *file)
struct snd_opl3 *opl3 = hw->private_data;
snd_opl3_reset(opl3);
- mutex_lock(&opl3->access_mutex);
- opl3->used--;
- mutex_unlock(&opl3->access_mutex);
-
return 0;
}