On Mon, Oct 09, 2017 at 09:00:49AM +0200, Thomas Petazzoni wrote:
> struct pci_host_bridge gained hooks to map/swizzle IRQs, so that the
> IRQ mapping can be done automatically by PCI core code through the
> pci_assign_irq() function instead of resorting to arch-specific
> implementation callbacks to carry out the same task which force PCI
> host bridge drivers implementation to implement per-arch kludges to
> carry out a task that is inherently architecture agnostic.
>
> Commit 769b461fc0c0 ("arm64: PCI: Drop DT IRQ allocation from
> pcibios_alloc_irq()") was assuming all PCI host controller drivers had
> been converted to use ->map_irq(), but that wasn't the case:
> pci-aardvark had not been converted. Due to this, it broke the support
> for legacy PCI interrupts when using the pci-aardvark driver (used on
> Marvell Armada 3720 platforms).
>
> In order to fix this, we make sure the ->map_irq and ->swizzle_irq
> fields of pci_host_bridge are properly filled in.
>
> Fixes: 769b461fc0c0 ("arm64: PCI: Drop DT IRQ allocation from pcibios_alloc_irq()")
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx> # v4.13+
Applied to for-linus for v4.14, thanks!
> ---
> Changes since v2:
> - Adjust commit title to match other commits doing the same change in
> other drivers
> - Improve commit log.
> ---
> drivers/pci/host/pci-aardvark.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/pci/host/pci-aardvark.c b/drivers/pci/host/pci-aardvark.c
> index 89f4e3d072d7..26ed0c08f209 100644
> --- a/drivers/pci/host/pci-aardvark.c
> +++ b/drivers/pci/host/pci-aardvark.c
> @@ -935,6 +935,8 @@ static int advk_pcie_probe(struct platform_device *pdev)
> bridge->sysdata = pcie;
> bridge->busnr = 0;
> bridge->ops = &advk_pcie_ops;
> + bridge->map_irq = of_irq_parse_and_map_pci;
> + bridge->swizzle_irq = pci_common_swizzle;
>
> ret = pci_scan_root_bus_bridge(bridge);
> if (ret < 0) {
> --
> 2.13.6
>
>
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