ACPI / EC: Ensure lock is acquired before accessing ec struct members

[firefly-linux-kernel-4.4.55.git] / drivers / acpi / video.c

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 5d7075d25700b3bbd2cbe65772391155d1a10d30..0e4b96b62c75f0bf1a79eb72405ce14eed07a5a0 100644 (file)
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -448,6 +448,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = {
                DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"),
                },
        },
+       {
+        .callback = video_ignore_initial_backlight,
+        .ident = "Fujitsu E753",
+        .matches = {
+               DMI_MATCH(DMI_BOARD_VENDOR, "FUJITSU"),
+               DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK E753"),
+               },
+       },
        {
         .callback = video_ignore_initial_backlight,
         .ident = "HP Pavilion dm4",
@@ -1722,6 +1730,9 @@ static int acpi_video_bus_add(struct acpi_device *device)
        int error;
        acpi_status status;
 
+       if (device->handler)
+               return -EINVAL;
+
        status = acpi_walk_namespace(ACPI_TYPE_DEVICE,
                                device->parent->handle, 1,
                                acpi_video_bus_match, NULL,