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From 7931a2a131998d990e5f9732fc3dc448ec672046 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
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 <pali@kernel.org>
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
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