Re: [PATCH v24 23/34] ALSA: usb-audio: Prevent starting of audio stream if in use

[Amadeusz Sławiński <amadeuszx.slawinski@xxxxxxxxxxxxxxx>]

On 8/1/2024 3:17 AM, Wesley Cheng wrote:
> With USB audio offloading, an audio session is started from the ASoC
> platform sound card and PCM devices.  Likewise, the USB SND path is still
> readily available for use, in case the non-offload path is desired.  In
> order to prevent the two entities from attempting to use the USB bus,
> introduce a flag that determines when either paths are in use.

How can this happen? Can you provide some example with list of devices 
and which one should block the other? If I recall correctly devices are 
already exclusive unless you support substreams which ASoC does not at 
the moment.