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>
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 7d678bb..17bed18 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -93,8 +93,7 @@
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 @@
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);