Re: [PATCH 2/3] PCI: endpoint: pci-ep-msi: Make embedded doorbell IRQ exclusive

> Embedded doorbells may use the same virq for several messages. This does
> not mean the IRQ itself should be shared. Consumers only need to request
> each distinct virq once, as vNTB and pci-epf-test already do.
>=20
> IRQF_SHARED would let different EPFs register handlers for the same IRQ.
> The embedded doorbell interface cannot tell which EPF a write targets,
> so every handler would handle it.
>=20
> Only the first EPF can allocate doorbells today, so this cannot happen
> yet. Drop IRQF_SHARED before extending the embedded backend to non-first
> EPFs. A second request for the same IRQ will then fail with -EBUSY
> instead of attaching another handler.
>=20
> Signed-off-by: Koichiro Den <[email protected]>

Sashiko has reviewed this patch and found no issues. It looks great!

--=20
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