greybus: update operation result atomically

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An operation result can be set both in and out of interrupt context.
For example, a response message could be arriving at the same time a
timeout of the operation is getting processed.  We therefore need to
ensure the result is accessed atomically.

Protect updates to the errno field using the operations spinlock.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

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Alex Elder 2014-11-25 16:54:02 -06:00 • committed by Greg Kroah-Hartman

parent aa3a4d1209

commit 894cbc3136

1 changed files with 20 additions and 6 deletions

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drivers/staging/greybus/operation.c

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