greybus: loopback: Convert cross-thread mutex to spinlock while relaxing connect locks

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This patch converts the cross-thread mutex used to synchronize threads with
respect to each other to a spinlock. This is done to enable taking of locks
in the following patches while in atomic context. A small re-order of
locking in connection setup/tear-down is done to minimize the amount of
time spent in spinlock_irqsave().

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

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Bryan O'Donoghue 2015-12-07 01:59:05 +00:00 • committed by Greg Kroah-Hartman

parent b933fa4a40

commit 2e238d71ed

1 changed files with 17 additions and 11 deletions

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drivers/staging/greybus/loopback.c

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