diff options
| -rw-r--r-- | sound/firewire/amdtp-stream.c | 31 |
1 files changed, 14 insertions, 17 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index 150ee0b9e707..426a85b56cf1 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -613,8 +613,16 @@ static void update_pcm_pointers(struct amdtp_stream *s, // The program in user process should periodically check the status of intermediate // buffer associated to PCM substream to process PCM frames in the buffer, instead // of receiving notification of period elapsed by poll wait. - if (!pcm->runtime->no_period_wakeup) - queue_work(system_highpri_wq, &s->period_work); + if (!pcm->runtime->no_period_wakeup) { + if (in_interrupt()) { + // In software IRQ context for 1394 OHCI. + snd_pcm_period_elapsed(pcm); + } else { + // In process context of ALSA PCM application under acquired lock of + // PCM substream. + snd_pcm_period_elapsed_under_stream_lock(pcm); + } + } } } @@ -1740,22 +1748,11 @@ unsigned long amdtp_domain_stream_pcm_pointer(struct amdtp_domain *d, { struct amdtp_stream *irq_target = d->irq_target; + // Process isochronous packets queued till recent isochronous cycle to handle PCM frames. if (irq_target && amdtp_stream_running(irq_target)) { - // This function is called in software IRQ context of - // period_work or process context. - // - // When the software IRQ context was scheduled by software IRQ - // context of IT contexts, queued packets were already handled. - // Therefore, no need to flush the queue in buffer furthermore. - // - // When the process context reach here, some packets will be - // already queued in the buffer. These packets should be handled - // immediately to keep better granularity of PCM pointer. - // - // Later, the process context will sometimes schedules software - // IRQ context of the period_work. Then, no need to flush the - // queue by the same reason as described in the above - if (current_work() != &s->period_work) + // In software IRQ context, the call causes dead-lock to disable the tasklet + // synchronously. + if (!in_interrupt()) fw_iso_context_flush_completions(irq_target->context); } |