The inline acpi_video_register stub simply allows compilation on systems with CONFIG_ACPI_VIDEO disabled. the dummy acpi_video_register does not register an acpi_bus_driver at all. The inline acpi_video_register should return to indicate lack of support when attempting to register an acpi_bus_driver on such a system with CONFIG_ACPI_VIDEO disabled.
Signed-off-by: Arvind Yadav <[email protected]> --- include/acpi/video.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/acpi/video.h b/include/acpi/video.h index 5731ccb..4536bd3 100644 --- a/include/acpi/video.h +++ b/include/acpi/video.h @@ -54,7 +54,7 @@ extern int acpi_video_get_levels(struct acpi_device *device, struct acpi_video_device_brightness **dev_br, int *pmax_level); #else -static inline int acpi_video_register(void) { return 0; } +static inline int acpi_video_register(void) { return -ENODEV; } static inline void acpi_video_unregister(void) { return; } static inline int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, void **edid) -- 1.9.1
