On Wed, Feb 26, 2020 at 08:36:37AM +0100, Herbrechtsmeier Dr.-Ing. , Stefan wrote:

> I see two possible solutions.
> a) The complexity is handled inside the client. The client uses the
> controller exclusive and isn’t allowed to use the new panic transfer during
> a normal transfer.

Then someone builds a system with two devices attached to a single SPI
controller...  besides, you've got no mechanism for controlling when a
kernel might panic or power might be lost.  I'm not sure a scheme that
relies on being able to control when stuff happens is going to be what
you need.