diff options
Diffstat (limited to 'sound/firewire/amdtp-stream.c')
| -rw-r--r-- | sound/firewire/amdtp-stream.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index 23677b805b05..3d27d4ce2b45 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -1139,23 +1139,29 @@ unsigned long amdtp_domain_stream_pcm_pointer(struct amdtp_domain *d, EXPORT_SYMBOL_GPL(amdtp_domain_stream_pcm_pointer); /** - * amdtp_stream_pcm_ack - acknowledge queued PCM frames + * amdtp_domain_stream_pcm_ack - acknowledge queued PCM frames + * @d: the AMDTP domain. * @s: the AMDTP stream that transfers the PCM frames * * Returns zero always. */ -int amdtp_stream_pcm_ack(struct amdtp_stream *s) +int amdtp_domain_stream_pcm_ack(struct amdtp_domain *d, struct amdtp_stream *s) { - /* - * Process isochronous packets for recent isochronous cycle to handle - * queued PCM frames. - */ - if (amdtp_stream_running(s)) - fw_iso_context_flush_completions(s->context); + struct amdtp_stream *irq_target = d->irq_target; + + // Process isochronous packets for recent isochronous cycle to handle + // queued PCM frames. + if (irq_target && amdtp_stream_running(irq_target)) { + // Queued packet should be processed without any kernel + // preemption to keep latency against bus cycle. + preempt_disable(); + fw_iso_context_flush_completions(irq_target->context); + preempt_enable(); + } return 0; } -EXPORT_SYMBOL(amdtp_stream_pcm_ack); +EXPORT_SYMBOL_GPL(amdtp_domain_stream_pcm_ack); /** * amdtp_stream_update - update the stream after a bus reset |