backlight: fix memory leak on obscure error path

Dredged out of bugzilla

Reported-by: Martlin Ettl <ettl.martin@gmx.de>
Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=15492
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/video/backlight/88pm860x_bl.c b/drivers/video/backlight/88pm860x_bl.c
index f49181c..f75da87 100644
--- a/drivers/video/backlight/88pm860x_bl.c
+++ b/drivers/video/backlight/88pm860x_bl.c
@@ -228,6 +228,7 @@
 	data->port = pdata->flags;
 	if (data->port < 0) {
 		dev_err(&pdev->dev, "wrong platform data is assigned");
+		kfree(data);
 		return -EINVAL;
 	}