PCI: Mark invalid BARs as unassigned

If a BAR is not inside any upstream bridge window, or if it conflicts with
another resource, mark it as IORESOURCE_UNSET so we don't try to use it.
We may be able to assign a different address for it.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index b7c3a5ea1fca..232f9254c11a 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -120,6 +120,7 @@ int pci_claim_resource(struct pci_dev *dev, int resource)
         if (!root) {
                 dev_info(&dev->dev, "can't claim BAR %d %pR: no compatible bridge window\n",
                          resource, res);
+                res->flags |= IORESOURCE_UNSET;
                 return -EINVAL;
         }
 
@@ -127,6 +128,7 @@ int pci_claim_resource(struct pci_dev *dev, int resource)
         if (conflict) {
                 dev_info(&dev->dev, "can't claim BAR %d %pR: address conflict with %s %pR\n",
                          resource, res, conflict->name, conflict);
+                res->flags |= IORESOURCE_UNSET;
                 return -EBUSY;
         }