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![Bjorn Andersson](https://secure.gravatar.com/avatar/9b9fcb8609b69ef8f93d452d251b537a.jpg?s=96&d=mm)
Bjorn Andersson committed 4b83c52a21c
rpmsg: Allow callback to return errors Some rpmsg backends support holding on to and redelivering messages upon failed handling of them, so provide a way for the callback to report and error and allow the backends to handle this. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>