[2/2] cxl: Poll for outstanding IRQs when detaching a context

[Michael Ellerman]

On Fri, 2016-22-04 at 04:57:49 UTC, Michael Neuling wrote:
> When detaching contexts, we may still have interrupts in the system
> which are yet to be delivered to any CPU and be acked in the PSL.
> This can result in a subsequent unrelated process getting an spurious
> IRQ or an interrupt for a non-existent context.
> 
> This polls the PSL to ensure that the PSL is clear of IRQs for the
> detached context, before removing the context from the idr.
> 
> Signed-off-by: Michael Neuling <mikey at neuling.org>
> Tested-by: Andrew Donnellan <andrew.donnellan at au1.ibm.com>
> Acked-by: Ian Munsie <imunsie at au1.ibm.com>
> Tested-by: Vaibhav Jain <vaibhav at linux.vnet.ibm.com>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/2bc79ffcbb817873cc43d63118

cheers