Merge 3.18-rc4 into tty-next.

This resolves a merge issue with drivers/tty/serial/8250/8250_mtk.c

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index 64dacb7288a6..24c7728ca681 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -41,8 +41,13 @@ static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
 
         if (pci_is_root_bus(pbus))
                 dev = pbus->bridge;
-        else
+        else {
+                /* If pbus is a virtual bus, there is no bridge to it */
+                if (!pbus->self)
+                        return NULL;
+
                 dev = &pbus->self->dev;
+        }
 
         return ACPI_HANDLE(dev);
 }