On Mon, Mar 16, 2020 at 03:20:01PM -0700, Douglas Anderson wrote:

> +	/*
> +	 * We don't expect to hit this, but if we do we should try our best
> +	 * to clear the interrupts and return so we don't just get called
> +	 * again.
> +	 */
> +	if (mas->cur_mcmd == CMD_NONE)
> +		goto exit;
> +

Does this mean that there was an actual concrete message of type
CMD_NONE or does it mean that there was no message waiting?  If there
was no message then isn't the interrupt spurious?