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PCI: mvebu: Disallow mapping interrupts on emulated bridges

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Interrupt support on mvebu emulated bridges is not implemented yet.

So properly indicate return value to callers that they cannot request
interrupts from emulated bridge.

Link: https://lore.kernel.org/r/20211125124605.25915-6-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
This commit is contained in:
Pali Rohár 2021-11-25 13:45:55 +01:00 committed by Lorenzo Pieralisi
parent 11c2bf4a20
commit 319e6046bd
1 changed files with 10 additions and 0 deletions
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10
drivers/pci/controller/pci-mvebu.c
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@ -686,6 +686,15 @@ static struct pci_ops mvebu_pcie_ops = {
.write = mvebu_pcie_wr_conf,
};
static int mvebu_pcie_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
/* Interrupt support on mvebu emulated bridges is not implemented yet */
if (dev->bus->number == 0)
return 0; /* Proper return code 0 == NO_IRQ */
return of_irq_parse_and_map_pci(dev, slot, pin);
}
static resource_size_t mvebu_pcie_align_resource(struct pci_dev *dev,
const struct resource *res,
resource_size_t start,
@ -1102,6 +1111,7 @@ static int mvebu_pcie_probe(struct platform_device *pdev)
bridge->sysdata = pcie;
bridge->ops = &mvebu_pcie_ops;
bridge->align_resource = mvebu_pcie_align_resource;
bridge->map_irq = mvebu_pcie_map_irq;
return pci_host_probe(bridge);
}