[Bug 194727] uaudio device gets disconnected, and hangs usb until everything using /dev/mixer* is closed

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 06 Jun 2022 06:16:02 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194727

--- Comment #80 from Theron Tarigo <theron.tarigo@gmail.com> ---
(In reply to Theron Tarigo from comment #79)
Right, I've worked out what's the usual pattern for bus device vs. character
device decoupling.  Remaining work is to untangle master dsp device from its
channels and its clone and mixer devs - I suppose they will enter a state of
being effectively independent dummy devices waiting to be closed once the bus
device that tied them together is destroyed.

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