- if ((dev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
- return __pci_mmap_make_offset_bus(dev, vma, mmap_state);
+ /* First compute the physical address in vma->vm_pgoff,
+ * making sure the user offset is within range in the
+ * appropriate PCI space.
+ */
+ err = __pci_mmap_make_offset_bus(pdev, vma, mmap_state);
+ if (err)
+ return err;
+
+ /* If this is a mapping on a host bridge, any address
+ * is OK.
+ */
+ if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_HOST)
+ return err;
+
+ /* Otherwise make sure it's in the range for one of the
+ * device's resources.
+ */
+ user_paddr = vma->vm_pgoff << PAGE_SHIFT;
+ user_size = vma->vm_end - vma->vm_start;