diff options
Diffstat (limited to 'sound/firewire/motu/motu-hwdep.c')
-rw-r--r-- | sound/firewire/motu/motu-hwdep.c | 46 |
1 files changed, 37 insertions, 9 deletions
diff --git a/sound/firewire/motu/motu-hwdep.c b/sound/firewire/motu/motu-hwdep.c index 389e59ff768b..9c2e457ce692 100644 --- a/sound/firewire/motu/motu-hwdep.c +++ b/sound/firewire/motu/motu-hwdep.c @@ -25,7 +25,8 @@ static long hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count, spin_lock_irq(&motu->lock); - while (!motu->dev_lock_changed && motu->msg == 0) { + while (!motu->dev_lock_changed && motu->msg == 0 && + snd_motu_register_dsp_message_parser_count_event(motu) == 0) { prepare_to_wait(&motu->hwdep_wait, &wait, TASK_INTERRUPTIBLE); spin_unlock_irq(&motu->lock); schedule(); @@ -40,20 +41,46 @@ static long hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count, event.lock_status.type = SNDRV_FIREWIRE_EVENT_LOCK_STATUS; event.lock_status.status = (motu->dev_lock_count > 0); motu->dev_lock_changed = false; + spin_unlock_irq(&motu->lock); - count = min_t(long, count, sizeof(event.lock_status)); - } else { + count = min_t(long, count, sizeof(event)); + if (copy_to_user(buf, &event, count)) + return -EFAULT; + } else if (motu->msg > 0) { event.motu_notification.type = SNDRV_FIREWIRE_EVENT_MOTU_NOTIFICATION; event.motu_notification.message = motu->msg; motu->msg = 0; + spin_unlock_irq(&motu->lock); - count = min_t(long, count, sizeof(event.motu_notification)); - } + count = min_t(long, count, sizeof(event)); + if (copy_to_user(buf, &event, count)) + return -EFAULT; + } else if (snd_motu_register_dsp_message_parser_count_event(motu) > 0) { + size_t consumed = 0; + u32 __user *ptr; + u32 ev; - spin_unlock_irq(&motu->lock); + spin_unlock_irq(&motu->lock); - if (copy_to_user(buf, &event, count)) - return -EFAULT; + // Header is filled later. + consumed += sizeof(event.motu_register_dsp_change); + + while (consumed < count && + snd_motu_register_dsp_message_parser_copy_event(motu, &ev)) { + ptr = (u32 __user *)(buf + consumed); + if (put_user(ev, ptr)) + return -EFAULT; + consumed += sizeof(ev); + } + + event.motu_register_dsp_change.type = SNDRV_FIREWIRE_EVENT_MOTU_REGISTER_DSP_CHANGE; + event.motu_register_dsp_change.count = + (consumed - sizeof(event.motu_register_dsp_change)) / 4; + if (copy_to_user(buf, &event, sizeof(event.motu_register_dsp_change))) + return -EFAULT; + + count = consumed; + } return count; } @@ -67,7 +94,8 @@ static __poll_t hwdep_poll(struct snd_hwdep *hwdep, struct file *file, poll_wait(file, &motu->hwdep_wait, wait); spin_lock_irq(&motu->lock); - if (motu->dev_lock_changed || motu->msg) + if (motu->dev_lock_changed || motu->msg || + snd_motu_register_dsp_message_parser_count_event(motu) > 0) events = EPOLLIN | EPOLLRDNORM; else events = 0; |