When a device is scanned and added to the PCI bus, its resources
should be claimed to validate the BARs configuration and to assign
them a parent resource so that the resource hierarchy can be sanity
checked.
This patch adds code that carries out PCI device resources claiming to
the ARM64 pcibios_add_device implementation so that device resources
are claimed by the core PCI layer upon PCI device initialization on
ARM64 systems.
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: Liviu Dudau <liviu.dudau@xxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
---
arch/arm64/kernel/pci.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index 4095379..c0a88ca 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -43,8 +43,18 @@ resource_size_t pcibios_align_resource(void *data, const struct resource *res,
*/
int pcibios_add_device(struct pci_dev *dev)
{
+ struct resource *res;
+ int i;
+
dev->irq = of_irq_parse_and_map_pci(dev, 0, 0);
+ for (i = 0; i < PCI_NUM_RESOURCES; i++) {
+ res = &dev->resource[i];
+ if (res->parent || !res->flags)
+ continue;
+ pci_claim_resource(dev, i);
+ }
+
return 0;
}
--
2.2.1
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