On Mon, 23 Nov 2015, Marc Zyngier wrote:
> Since d8a1cb757550 ("PCI/MSI: Let pci_msi_get_domain use struct
> device::msi_domain"), we use the MSI domain associated to the PCI device.
>
> But finding a MSI domain doesn't mean that the domain is implemented
> using the generic MSI domain API, and a number of MSI controllers
> are still using the arch_setup_msi_irq/arch_teardown_msi_irqs.
>
> In order to avoid a firework on these systems, check that the domain
> we just obtained is hierarchical. If not, don't use the generic MSI
> stuff and stick with the old one. Not pretty, but reliable.
>
> Another insentive to rework those drivers and phase out this API.
>
> Reported-by: Phil Edworthy <[email protected]>
> Tested-by: Phil Edworthy <[email protected]>
> Signed-off-by: Marc Zyngier <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
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