ACPI / video: Propagate the error code for acpi_video_register

Report the actual error code from acpi_bus_register_driver(), it may
help future debugging (typically ENODEV as previously reported, but the
unusual cases are where it may help most).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 5f98ac6..26eb70c 100644 (file)
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -2110,7 +2110,8 @@ static int __init intel_opregion_present(void)
 
 int acpi_video_register(void)
 {
-       int result = 0;
+       int ret;
+
        if (register_count) {
                /*
                 * if the function of acpi_video_register is already called,
@@ -2122,9 +2123,9 @@ int acpi_video_register(void)
        mutex_init(&video_list_lock);
        INIT_LIST_HEAD(&video_bus_head);
 
-       result = acpi_bus_register_driver(&acpi_video_bus);
-       if (result < 0)
-               return -ENODEV;
+       ret = acpi_bus_register_driver(&acpi_video_bus);
+       if (ret)
+               return ret;
 
        /*
         * When the acpi_video_bus is loaded successfully, increase