Re: [RFC] powerpc/xive: Remove irq from queue when it is shutdown

On Wed, 2018-03-14 at 18:47 +0100, Cédric Le Goater wrote:

We could also loop on the ESB 'P' bit to wait for the irqs to be handled,
using :

        xive_esb_read(irq, XIVE_ESB_GET)

which has no side effect. It looks simpler to me. Is that possible ? 

But you can race with something sending another one... I prefer the
guarantee that after final masking, we check the queue contents on
shutdown.

That will be solid vs. other type of interrupts as well.

Cheers,
Ben.