> virtsnd_pcm_msg_send() can fail while queueing a transfer. Restore the
> failed message's length and notify the device about earlier messages
> queued by the same call, so they do not remain stranded.
>
> Propagate errors through the indirect transfer callback and commit its
> private cursor only after successful submission. Genuine transfer errors
> arm stop_operating and return -EPIPE so ALSA can retire the stream.
>
> Close ACK admission under the PCM stream lock before sleeping teardown.
> Keep the prepared state protected by the substream lock and reject ACK
> through prepare and parameter changes. Reopen admission in the reset
> callback while the core holds the PCM lock for its pointer rebase. An
> ACK racing with teardown returns -EBADFD and preserves stop state.
>
> Keep the polling feature path unchanged.
>
> Fixes: fe981e67568c ("ALSA: virtio: use ack callback")
>
> Reject a stopped playback ACK before the XRUN path can rearm
> stop_operating. For capture, allow the ordinary stopped tail only during
> DRAINING and only while no transfer XRUN is latched.
>
> Latch a transfer failure before stopping PCM work. Once core reports the
> member XRUN, ACK returns -EBADFD to avoid another linked XRUN. ACK during
> prepare remains rejected until the core state reaches PREPARED.
> Signed-off-by: Joonho Lee <[email protected]>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review ยท
https://sashiko.dev/#/patchset/[email protected]?part=4
