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sound: Use bus_topo_lock() where appropriate

Description

sound: Use bus_topo_lock() where appropriate

Lock around uses of devclass_*() and replace leftover
CTLFLAG_NEEDGIANTs with CTLFLAG_MPSAFE.

Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Reviewed by: imp, jhb
Differential Revision: https://reviews.freebsd.org/D46700

Details

Provenance
christosAuthored on Sun, Mar 30, 5:46 PM
Reviewer
imp
Differential Revision
D46700: sound: Use bus_topo_lock() where appropriate
Parents
rGa4aff024fd53: sound: Improve afmt_tab
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