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-rw-r--r--drivers/pci/setup-res.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 878fd0a65c0..589486704ce 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -33,6 +33,11 @@ pci_update_resource(struct pci_dev *dev, struct resource *res, int resno)
u32 new, check, mask;
int reg;
+ /* Ignore resources for unimplemented BARs and unused resource slots
+ for 64 bit BARs. */
+ if (!res->flags)
+ return;
+
pcibios_resource_to_bus(dev, &region, res);
pr_debug(" got res [%lx:%lx] bus [%lx:%lx] flags %lx for "
@@ -67,7 +72,7 @@ pci_update_resource(struct pci_dev *dev, struct resource *res, int resno)
if ((new & (PCI_BASE_ADDRESS_SPACE|PCI_BASE_ADDRESS_MEM_TYPE_MASK)) ==
(PCI_BASE_ADDRESS_SPACE_MEMORY|PCI_BASE_ADDRESS_MEM_TYPE_64)) {
- new = 0; /* currently everyone zeros the high address */
+ new = region.start >> 16 >> 16;
pci_write_config_dword(dev, reg + 4, new);
pci_read_config_dword(dev, reg + 4, &check);
if (check != new) {