[Intel-gfx] [PATCH v4 08/31] ACPI: video: Simplify acpi_video_unregister_backlight()

Hans de Goede
2022-08-24T12:17:30Z

When acpi_video_register() has not run yet the video_bus_head will be
empty, so there is no need to check the register_count flag first.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/acpi/acpi_video.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c
index cde8ffa9f0b8..8545bf94866f 100644
--- a/drivers/acpi/acpi_video.c
+++ b/drivers/acpi/acpi_video.c
@@ -2257,14 +2257,10 @@ void acpi_video_unregister_backlight(void)
{
struct acpi_video_bus *video;

- mutex_lock(&register_count_mutex);
- if (register_count) {
- mutex_lock(&video_list_lock);
- list_for_each_entry(video, &video_bus_head, entry)
- acpi_video_bus_unregister_backlight(video);
- mutex_unlock(&video_list_lock);
- }
- mutex_unlock(&register_count_mutex);
+ mutex_lock(&video_list_lock);
+ list_for_each_entry(video, &video_bus_head, entry)
+ acpi_video_bus_unregister_backlight(video);
+ mutex_unlock(&video_list_lock);
}

bool acpi_video_handles_brightness_key_presses(void)
--
2.37.2