[PATCHv2 4/4] backlight: led_bl: fix led -> backlight brightness mapping

[Tomi Valkeinen]

The code that maps the LED default brightness to backlight levels has
two issues: 1) if the default brightness is the first backlight level
(usually 0), the code fails to find it, and 2) when the code fails to
find a backlight level, it ends up using max_brightness + 1 as the
default brightness.

Fix these two issues.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
---
 drivers/video/backlight/led_bl.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/video/backlight/led_bl.c b/drivers/video/backlight/led_bl.c
index 63693c4f0883..43a5302f163a 100644
--- a/drivers/video/backlight/led_bl.c
+++ b/drivers/video/backlight/led_bl.c
@@ -159,10 +159,11 @@ static int led_bl_parse_levels(struct device *dev,
 		 */
 		db = priv->default_brightness;
 		for (i = 0 ; i < num_levels; i++) {
-			if ((i && db > levels[i - 1]) && db <= levels[i])
+			if ((i == 0 || db > levels[i - 1]) && db <= levels[i])
 				break;
 		}
-		priv->default_brightness = i;
+
+		priv->default_brightness = min(i, num_levels - 1);
 		priv->max_brightness = num_levels - 1;
 		priv->levels = levels;
 	} else if (num_levels >= 0) {
-- 
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