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PCI: for address space collisions, show conflicting resource 

With request_resource_conflict(), we can learn what the actual conflict is,
so print that info for debugging purposes.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Bjorn Helgaas 2010-03-11 17:01:19 -07:00 committed by Jesse Barnes
parent 66f1207bce
commit 966f3a7570
1 changed files with 8 additions and 6 deletions
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14
drivers/pci/setup-res.c
View File

@ -93,8 +93,7 @@ void pci_update_resource(struct pci_dev *dev, int resno)
int pci_claim_resource(struct pci_dev *dev, int resource)
{
struct resource *res = &dev->resource[resource];
struct resource *root;
int err;
struct resource *root, *conflict;
root = pci_find_parent_resource(dev, res);
if (!root) {
@ -103,12 +102,15 @@ int pci_claim_resource(struct pci_dev *dev, int resource)
return -EINVAL;
}
err = request_resource(root, res);
if (err)
conflict = request_resource_conflict(root, res);
if (conflict) {
dev_err(&dev->dev,
"address space collision: %pR already in use\n", res);
"address space collision: %pR conflicts with %s %pR\n",
res, conflict->name, conflict);
return -EBUSY;
}
return err;
return 0;
}
EXPORT_SYMBOL(pci_claim_resource);