1 files changed, 36 insertions, 13 deletions

diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 12403516776a..b711fb7181e2 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)
 {