On Fri, 23 Apr 2021 20:04:38 +0200,
Lucas wrote:
>
> On Fri, Apr 23, 2021 at 2:47 AM Takashi Iwai <tiwai@xxxxxxx> wrote:
>
> Is this really with snd-usb-audio driver? Please check the entry in
> /proc/asound/modules (or traverse via sysfs).
>
> No, I see it's not. It's using the correct snd_ua101 module
Then it's expected, and it's been so. I haven't touched snd-ua101
driver code until now.
> This rather sounds like a generic problem of the implicit feedback.
> Please give the kernel log with snd_usb_audio.dyndbg=+p boot option
> with some notion which timestamp corresponding to which action
> (e.g. starting playback, stopping recording, etc).
>
> Okay, that's good news! Thanks, and here's that:
Thanks.
Could you try the patch below?
Takashi
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -1443,11 +1443,11 @@ void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep)
if (snd_BUG_ON(!atomic_read(&ep->running)))
return;
- if (ep->sync_source)
- WRITE_ONCE(ep->sync_source->sync_sink, NULL);
-
- if (!atomic_dec_return(&ep->running))
+ if (!atomic_dec_return(&ep->running)) {
+ if (ep->sync_source)
+ WRITE_ONCE(ep->sync_source->sync_sink, NULL);
stop_urbs(ep, false);
+ }
}
/**
