From 4c4dd903e72507c853b8c2b04b22e0d0c721fd93 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@gmail.com>
Date: Wed, 3 Aug 2011 16:21:16 -0700
Subject: drivers/video/backlight/aat2870_bl.c: fix error checking for
 backlight_device_register

backlight_device_register() returns ERR_PTR() on error.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Jin Park <jinyoungp@nvidia.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c
index 4952a61..f13a3f7 100644
--- a/drivers/video/backlight/aat2870_bl.c
+++ b/drivers/video/backlight/aat2870_bl.c
@@ -158,10 +158,10 @@ static int aat2870_bl_probe(struct platform_device *pdev)
 	props.type = BACKLIGHT_RAW;
 	bd = backlight_device_register("aat2870-backlight", &pdev->dev,
 				       aat2870_bl, &aat2870_bl_ops, &props);
-	if (!bd) {
+	if (IS_ERR(bd)) {
 		dev_err(&pdev->dev,
 			"Failed allocate memory for backlight device\n");
-		ret = -ENOMEM;
+		ret = PTR_ERR(bd);
 		goto out_kfree;
 	}
 
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