2 files changed, 13 insertions, 1 deletions

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 147bc1b91b42..3f2bdc812d23 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1810,6 +1810,16 @@ acpi_status __init acpi_os_initialize(void)
         acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
         acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
         acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
+        if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
+                /*
+                 * Use acpi_os_map_generic_address to pre-map the reset
+                 * register if it's in system memory.
+                 */
+                int rv;
+
+                rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
+                pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
+        }
 
         return AE_OK;
 }
@@ -1838,6 +1848,8 @@ acpi_status acpi_os_terminate(void)
         acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
         acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
         acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
+        if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
+                acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
 
         destroy_workqueue(kacpid_wq);
         destroy_workqueue(kacpi_notify_wq);
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 101fb090dcb9..fb9ffe9adc64 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -82,7 +82,7 @@ module_param(allow_duplicates, bool, 0644);
  * For Windows 8 systems: used to decide if video module
  * should skip registering backlight interface of its own.
  */
-static int use_native_backlight_param = -1;
+static int use_native_backlight_param = 1;
 module_param_named(use_native_backlight, use_native_backlight_param, int, 0444);
 static bool use_native_backlight_dmi = false;