This makes the code more compact and error handling more robust
by ensuring that mutexes are released in all code paths when control
leaves critical section.
Acked-by: Henrik Rydberg <rydberg@bitmath.org>
Link: https://lore.kernel.org/r/ZsrBVO2w9WwX73iU@google.comSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>