staging: unisys: visorbus: add error handling to handle_command
Add error handling to the function handle_command. Since handle_command now returns errors, we need to process them correctly in process_controlvm_event. Note: It is invalid to have a controlvm test message in the event queue, so return -EINVAL if one is discovered. Signed-off-by: David Kershner <david.kershner@unisys.com> Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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