Re: [PATCH] ALSA: firewire-motu: Protect register DSP event queue positions

[Takashi Iwai]

On Thu, 21 May 2026 13:01:23 +0200,
Cássio Gabriel wrote:
> 
> The register DSP event queue is updated under parser->lock, but
> snd_motu_register_dsp_message_parser_count_event() reads pull_pos and
> push_pos without the lock.
> snd_motu_register_dsp_message_parser_copy_event() also reads both queue
> positions before taking the lock.
> 
> Protect these accesses with parser->lock as well. This keeps the hwdep
> poll/read path consistent with the producer side and with the cached
> meter/parameter accessors.
> 
> Fixes: 634ec0b2906e ("ALSA: firewire-motu: notify event for parameter change in register DSP model")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Cássio Gabriel <cassiogabrielcontato@xxxxxxxxx>

Applied now.  Thanks.


Takashi