greybus: loopback: return the right error value

If an error occurs starting up the loopback thread, the error code
is not extracted properly.  Fix that.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Alex Elder 2015-05-11 21:16:35 -05:00 • committed by Greg Kroah-Hartman
commit 69f6034792