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>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c
index 4952a617563d..f13a3f7e2e8f 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;
         }