Update bbswitch.c

bbswitch.c

@@ -287,7 +287,7 @@ static void bbswitch_on(void) {
         return;
 
     pr_info("enabling discrete graphics\n");
-
+    pci_bridge_secondary_bus_reset(dis_dev);
     if (bbswitch_acpi_on())
         pr_warn("The discrete card could not be enabled by a _DSM call\n");