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PCI: Don't try to claim IORESOURCE_UNSET resources 

If the IORESOURCE_UNSET bit is set, it means we haven't assigned an address
yet, so don't try to claim the region.

Also, make the error messages more uniform and add info about which BAR is
involved.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Bjorn Helgaas 2014-02-26 11:25:59 -07:00
parent cd8a4d3657
commit 29003beb7f
1 changed files with 10 additions and 5 deletions
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15
drivers/pci/setup-res.c
View File

@ -111,18 +111,23 @@ int pci_claim_resource(struct pci_dev *dev, int resource)
struct resource *res = &dev->resource[resource];
struct resource *root, *conflict;
if (res->flags & IORESOURCE_UNSET) {
dev_info(&dev->dev, "can't claim BAR %d %pR: no address assigned\n",
resource, res);
return -EINVAL;
}
root = pci_find_parent_resource(dev, res);
if (!root) {
dev_info(&dev->dev, "no compatible bridge window for %pR\n",
res);
dev_info(&dev->dev, "can't claim BAR %d %pR: no compatible bridge window\n",
resource, res);
return -EINVAL;
}
conflict = request_resource_conflict(root, res);
if (conflict) {
dev_info(&dev->dev,
"address space collision: %pR conflicts with %s %pR\n",
res, conflict->name, conflict);
dev_info(&dev->dev, "can't claim BAR %d %pR: address conflict with %s %pR\n",
resource, res, conflict->name, conflict);
return -EBUSY;
}