3 files changed, 18 insertions, 2 deletions

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 31122214e0ec..1af808171d46 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -389,6 +389,17 @@ struct pci_dev *acpi_get_pci_dev(acpi_handle handle)
 
                 pbus = pdev->subordinate;
                 pci_dev_put(pdev);
+
+                /*
+                 * This function may be called for a non-PCI device that has a
+                 * PCI parent (eg. a disk under a PCI SATA controller).  In that
+                 * case pdev->subordinate will be NULL for the parent.
+                 */
+                if (!pbus) {
+                        dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n");
+                        pdev = NULL;
+                        break;
+                }
         }
 out:
         list_for_each_entry_safe(node, tmp, &device_list, node)
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index f6e54bf8dd96..64e3c581b7a9 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1109,7 +1109,12 @@ static int acpi_video_bus_check(struct acpi_video_bus *video)
          */
 
         /* Does this device support video switching? */
-        if (video->cap._DOS) {
+        if (video->cap._DOS || video->cap._DOD) {
+                if (!video->cap._DOS) {
+                        printk(KERN_WARNING FW_BUG
+                                "ACPI(%s) defines _DOD but not _DOS\n",
+                                acpi_device_bid(video->device));
+                }
                 video->flags.multihead = 1;
                 status = 0;
         }
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index 7032f25da9b5..575593a8b4e6 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -84,7 +84,7 @@ long acpi_is_video_device(struct acpi_device *device)
                 return 0;
 
         /* Does this device able to support video switching ? */
-        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy)) &&
+        if (ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOD", &h_dummy)) ||
             ACPI_SUCCESS(acpi_get_handle(device->handle, "_DOS", &h_dummy)))
                 video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING;