PCI: of_property: Assign PCI instead of CPU bus address to dynamic PCI nodes

When populating "ranges" property for a PCI bridge or endpoint,
of_pci_prop_ranges() incorrectly uses the CPU address of the resource.  In
such PCI nodes, the window should instead be in PCI address space. Call
pci_bus_address() on the resource in order to obtain the PCI bus address.

[Previous discussion at:
https://lore.kernel.org/all/8b4fa91380fc4754ea80f47330c613e4f6b6592c.1724159867.git.andrea.porta@suse.com/]

Link: https://lore.kernel.org/r/20241108094256.28933-1-andrea.porta@suse.com
Fixes: 407d1a51921e ("PCI: Create device tree node for bridge")
Tested-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Andrea della Porta <andrea.porta@suse.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/pci/of_property.c b/drivers/pci/of_property.c
index 5a0b98e..886c236 100644 (file)
--- a/drivers/pci/of_property.c
+++ b/drivers/pci/of_property.c
@@ -126,7 +126,7 @@ static int of_pci_prop_ranges(struct pci_dev *pdev, struct of_changeset *ocs,
                if (of_pci_get_addr_flags(&res[j], &flags))
                        continue;
 
-               val64 = res[j].start;
+               val64 = pci_bus_address(pdev, &res[j] - pdev->resource);
                of_pci_set_address(pdev, rp[i].parent_addr, val64, 0, flags,
                                   false);
                if (pci_is_bridge(pdev)) {