From 319e6046bd5a59e09c1a08fd6f6929df4ae9a1dc Mon Sep 17 00:00:00 2001
From: =?utf8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
Date: Thu, 25 Nov 2021 13:45:55 +0100
Subject: [PATCH] PCI: mvebu: Disallow mapping interrupts on emulated bridges
MIME-Version: 1.0
Content-Type: text/plain; charset=utf8
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.
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>
---
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 8388a9cc911d2..d9c76780d7cf4 100644
--- a/drivers/pci/controller/pci-mvebu.c
+++ b/drivers/pci/controller/pci-mvebu.c
@@ -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);
}
--
2.30.2