greybus: uart: wait for credits on shutdown

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We should try to wait until all credits are accounted
for before returning from shutdown.

For this purpose add a helper function that will
wait on completion, and call it form the shutdown.
This helper will also be useful when "wait until sent" is
implemented.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

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Axel Haslam 2016-05-31 14:36:13 +02:00 • committed by Greg Kroah-Hartman

parent 2b3b87f056

commit 5dad5c314b

1 changed files with 31 additions and 0 deletions

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drivers/staging/greybus/uart.c

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