tree 245cac075d31495316524442c4f653be820063fb
parent a3fdc06a53cbcc0e6b77863aae9a7b01a0848fd0
author Marc Zyngier <maz@kernel.org> 1655548173 +0100
committer Marc Zyngier <maz@kernel.org> 1655548173 +0100

ACPI: irq: Allow acpi_gsi_to_irq() to have an arch-specific fallback

It appears that the generic version of acpi_gsi_to_irq() doesn't
fallback to establishing a mapping if there is no pre-existing
one while the x86 version does.

While arm64 seems unaffected by it, LoongArch is relying on the x86
behaviour. In an effort to prevent new architectures from reinventing
the proverbial wheel, provide an optional callback that the arch code
can set to restore the x86 behaviour.

Hopefully we can eventually get rid of this in the future once
the expected behaviour has been clarified.

Reported-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Marc Zyngier <maz@kernel.org>