[PATCH] powerpc/xive: Change IRQ domain to a tree domain

[Michael Ellerman]

On Tue, 16 Nov 2021 14:40:22 +0100, Cédric Le Goater wrote:
> Commit 4f86a06e2d6e ("irqdomain: Make normal and nomap irqdomains
> exclusive") introduced an IRQ_DOMAIN_FLAG_NO_MAP flag to isolate the
> 'nomap' domains still in use under the powerpc arch. With this new
> flag, the revmap_tree of the IRQ domain is not used anymore. This
> change broke the support of shared LSIs [1] in the XIVE driver because
> it was relying on a lookup in the revmap_tree to query previously
> mapped interrupts. Linux now creates two distinct IRQ mappings on the
> same HW IRQ which can lead to unexpected behavior in the drivers.
> 
> [...]

Applied to powerpc/fixes.

[1/1] powerpc/xive: Change IRQ domain to a tree domain
      https://git.kernel.org/powerpc/c/8e80a73fa9a7747e3e8255cb149c543aabf65a24

cheers