If an operation times out, we need to cancel whatever message it
has in-flight. Do that instead of completing the operation, in the
timeout handler. When the in-flight request message is canceled its
completion function will lead to the proper completion of the
operation.
Change gb_operation_cancel() so it takes the errno that it's
supposed to assign as the result of the operation.
Note that we want to preserve the original -ETIMEDOUT error, so
don't overwrite the operation result value if it has already been
set.
Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>