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ACPI: video: Simplify acpi_video_unregister_backlight()

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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>
This commit is contained in:
Hans de Goede 2022-04-29 13:29:31 +02:00
parent c1af8bec56
commit 038a8191ae
1 changed files with 4 additions and 8 deletions
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12
drivers/acpi/acpi_video.c
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@ -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)