From 7931a2a131998d990e5f9732fc3dc448ec672046 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Pali=20Roh=C3=A1r?= Date: Fri, 17 Sep 2021 13:42:10 +0200 Subject: [PATCH 10/90] PCI: mvebu: Disallow mapping interrupts on emulated bridges MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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. Signed-off-by: Pali Rohár Cc: stable@vger.kernel.org --- drivers/pci/controller/pci-mvebu.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/pci/controller/pci-mvebu.c b/drivers/pci/controller/pci-mvebu.c index 5bf1889cfb38..0a8b552364aa 100644 --- a/drivers/pci/controller/pci-mvebu.c +++ b/drivers/pci/controller/pci-mvebu.c @@ -787,6 +787,15 @@ 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, @@ -1279,6 +1288,7 @@ 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); } -- 2.34.1