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path: root/drivers/pci/setup-res.c
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Diffstat (limited to 'drivers/pci/setup-res.c')
-rw-r--r--drivers/pci/setup-res.c49
1 files changed, 36 insertions, 13 deletions
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 12403516776..b711fb7181e 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -135,23 +135,16 @@ void pci_disable_bridge_window(struct pci_dev *dev)
}
#endif /* CONFIG_PCI_QUIRKS */
-int pci_assign_resource(struct pci_dev *dev, int resno)
+static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev,
+ int resno)
{
- struct pci_bus *bus = dev->bus;
struct resource *res = dev->resource + resno;
resource_size_t size, min, align;
int ret;
size = resource_size(res);
min = (res->flags & IORESOURCE_IO) ? PCIBIOS_MIN_IO : PCIBIOS_MIN_MEM;
-
align = resource_alignment(res);
- if (!align) {
- dev_info(&dev->dev, "BAR %d: can't allocate resource (bogus "
- "alignment) %pR flags %#lx\n",
- resno, res, res->flags);
- return -EINVAL;
- }
/* First, try exact prefetching match.. */
ret = pci_bus_alloc_resource(bus, res, size, align, min,
@@ -169,10 +162,7 @@ int pci_assign_resource(struct pci_dev *dev, int resno)
pcibios_align_resource, dev);
}
- if (ret) {
- dev_info(&dev->dev, "BAR %d: can't allocate %s resource %pR\n",
- resno, res->flags & IORESOURCE_IO ? "I/O" : "mem", res);
- } else {
+ if (!ret) {
res->flags &= ~IORESOURCE_STARTALIGN;
if (resno < PCI_BRIDGE_RESOURCES)
pci_update_resource(dev, resno);
@@ -181,6 +171,39 @@ int pci_assign_resource(struct pci_dev *dev, int resno)
return ret;
}
+int pci_assign_resource(struct pci_dev *dev, int resno)
+{
+ struct resource *res = dev->resource + resno;
+ resource_size_t align;
+ struct pci_bus *bus;
+ int ret;
+
+ align = resource_alignment(res);
+ if (!align) {
+ dev_info(&dev->dev, "BAR %d: can't allocate resource (bogus "
+ "alignment) %pR flags %#lx\n",
+ resno, res, res->flags);
+ return -EINVAL;
+ }
+
+ bus = dev->bus;
+ while ((ret = __pci_assign_resource(bus, dev, resno))) {
+ if (bus->parent && bus->self->transparent)
+ bus = bus->parent;
+ else
+ bus = NULL;
+ if (bus)
+ continue;
+ break;
+ }
+
+ if (ret)
+ dev_info(&dev->dev, "BAR %d: can't allocate %s resource %pR\n",
+ resno, res->flags & IORESOURCE_IO ? "I/O" : "mem", res);
+
+ return ret;
+}
+
#if 0
int pci_assign_resource_fixed(struct pci_dev *dev, int resno)
{