diff options
| -rw-r--r-- | include/sound/control.h | 11 | ||||
| -rw-r--r-- | sound/core/control.c | 27 | ||||
| -rw-r--r-- | sound/core/pcm.c | 15 | ||||
| -rw-r--r-- | sound/core/rawmidi.c | 14 |
4 files changed, 38 insertions, 29 deletions
diff --git a/include/sound/control.h b/include/sound/control.h index 042613938a1d..75f3054023f7 100644 --- a/include/sound/control.h +++ b/include/sound/control.h @@ -93,12 +93,17 @@ struct snd_kctl_event { struct pid; +enum { + SND_CTL_SUBDEV_PCM, + SND_CTL_SUBDEV_RAWMIDI, + SND_CTL_SUBDEV_ITEMS, +}; + struct snd_ctl_file { struct list_head list; /* list of all control files */ struct snd_card *card; struct pid *pid; - int prefer_pcm_subdevice; - int prefer_rawmidi_subdevice; + int preferred_subdevice[SND_CTL_SUBDEV_ITEMS]; wait_queue_head_t change_sleep; spinlock_t read_lock; struct fasync_struct *fasync; @@ -138,6 +143,8 @@ int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn); #define snd_ctl_unregister_ioctl_compat(fcn) #endif +int snd_ctl_get_preferred_subdevice(struct snd_card *card, int type); + static inline unsigned int snd_ctl_get_ioffnum(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id) { return id->numid - kctl->id.numid; diff --git a/sound/core/control.c b/sound/core/control.c index bb96a467e88d..cd246a0bcd55 100644 --- a/sound/core/control.c +++ b/sound/core/control.c @@ -50,7 +50,7 @@ static int snd_ctl_open(struct inode *inode, struct file *file) unsigned long flags; struct snd_card *card; struct snd_ctl_file *ctl; - int err; + int i, err; err = nonseekable_open(inode, file); if (err < 0) @@ -79,8 +79,8 @@ static int snd_ctl_open(struct inode *inode, struct file *file) init_waitqueue_head(&ctl->change_sleep); spin_lock_init(&ctl->read_lock); ctl->card = card; - ctl->prefer_pcm_subdevice = -1; - ctl->prefer_rawmidi_subdevice = -1; + for (i = 0; i < SND_CTL_SUBDEV_ITEMS; i++) + ctl->preferred_subdevice[i] = -1; ctl->pid = get_pid(task_pid(current)); file->private_data = ctl; write_lock_irqsave(&card->ctl_files_rwlock, flags); @@ -1607,6 +1607,27 @@ static int snd_ctl_fasync(int fd, struct file * file, int on) return fasync_helper(fd, file, on, &ctl->fasync); } +/* return the preferred subdevice number if already assigned; + * otherwise return -1 + */ +int snd_ctl_get_preferred_subdevice(struct snd_card *card, int type) +{ + struct snd_ctl_file *kctl; + int subdevice = -1; + + read_lock(&card->ctl_files_rwlock); + list_for_each_entry(kctl, &card->ctl_files, list) { + if (kctl->pid == task_pid(current)) { + subdevice = kctl->preferred_subdevice[type]; + if (subdevice != -1) + break; + } + } + read_unlock(&card->ctl_files_rwlock); + return subdevice; +} +EXPORT_SYMBOL_GPL(snd_ctl_get_preferred_subdevice); + /* * ioctl32 compat */ diff --git a/sound/core/pcm.c b/sound/core/pcm.c index dba5180e5b80..1b7c473720fa 100644 --- a/sound/core/pcm.c +++ b/sound/core/pcm.c @@ -161,7 +161,7 @@ static int snd_pcm_control_ioctl(struct snd_card *card, if (get_user(val, (int __user *)arg)) return -EFAULT; - control->prefer_pcm_subdevice = val; + control->preferred_subdevice[SND_CTL_SUBDEV_PCM] = val; return 0; } } @@ -901,9 +901,8 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, struct snd_pcm_str * pstr; struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; - struct snd_ctl_file *kctl; struct snd_card *card; - int prefer_subdevice = -1; + int prefer_subdevice; size_t size; if (snd_BUG_ON(!pcm || !rsubstream)) @@ -914,15 +913,7 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream, return -ENODEV; card = pcm->card; - read_lock(&card->ctl_files_rwlock); - list_for_each_entry(kctl, &card->ctl_files, list) { - if (kctl->pid == task_pid(current)) { - prefer_subdevice = kctl->prefer_pcm_subdevice; - if (prefer_subdevice != -1) - break; - } - } - read_unlock(&card->ctl_files_rwlock); + prefer_subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_PCM); switch (stream) { case SNDRV_PCM_STREAM_PLAYBACK: diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 6fc71a4c8a51..be18162c380f 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -369,7 +369,6 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file) struct snd_rawmidi *rmidi; struct snd_rawmidi_file *rawmidi_file = NULL; wait_queue_t wait; - struct snd_ctl_file *kctl; if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) return -EINVAL; /* invalid combination */ @@ -413,16 +412,7 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file) init_waitqueue_entry(&wait, current); add_wait_queue(&rmidi->open_wait, &wait); while (1) { - subdevice = -1; - read_lock(&card->ctl_files_rwlock); - list_for_each_entry(kctl, &card->ctl_files, list) { - if (kctl->pid == task_pid(current)) { - subdevice = kctl->prefer_rawmidi_subdevice; - if (subdevice != -1) - break; - } - } - read_unlock(&card->ctl_files_rwlock); + subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_RAWMIDI); err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file); if (err >= 0) break; @@ -862,7 +852,7 @@ static int snd_rawmidi_control_ioctl(struct snd_card *card, if (get_user(val, (int __user *)argp)) return -EFAULT; - control->prefer_rawmidi_subdevice = val; + control->preferred_subdevice[SND_CTL_SUBDEV_RAWMIDI] = val; return 0; } case SNDRV_CTL_IOCTL_RAWMIDI_INFO: |