greybus: loopback: convert loopback wake/sleep to a waitqueue

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Current code will incrementally poll for gb->type == 0 and sleep.
This type of polling strategy wastes cycles.

This patch changes the sleep strategy by introducing a wait-queue which
waits for gb->type != 0 or kthread_should_stop() to wake-up and work or
to wake-up and terminate.

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 2015-07-24 10:02:56 +01:00 • committed by Greg Kroah-Hartman

parent c2939f41bc

commit 3dfe8aaaee

1 changed files with 17 additions and 13 deletions

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34

drivers/staging/greybus/loopback.c

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