1 files changed, 8 insertions, 4 deletions

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index 057389d69a51..995f0164c9b0 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -54,14 +54,18 @@ static int pwm_backlight_update_status(struct backlight_device *bl)
                 pwm_config(pb->pwm, 0, pb->period);
                 pwm_disable(pb->pwm);
         } else {
+                int duty_cycle;
+
                 if (pb->levels) {
-                        brightness = pb->levels[brightness];
+                        duty_cycle = pb->levels[brightness];
                         max = pb->levels[max];
+                } else {
+                        duty_cycle = brightness;
                 }
 
-                brightness = pb->lth_brightness +
-                        (brightness * (pb->period - pb->lth_brightness) / max);
-                pwm_config(pb->pwm, brightness, pb->period);
+                duty_cycle = pb->lth_brightness +
+                     (duty_cycle * (pb->period - pb->lth_brightness) / max);
+                pwm_config(pb->pwm, duty_cycle, pb->period);
                 pwm_enable(pb->pwm);
         }