From 90a864b965e452ee2a15ed7b13f47142aeb4a40b Mon Sep 17 00:00:00 2001
From: Arvind Yadav <arvind.yadav.cs@gmail.com>
Date: Thu, 9 Mar 2017 11:19:56 +0530
Subject: [PATCH] platform/x86: dell-laptop: Handle return error form
 dell_get_intensity.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Here, This patch is to handle a return error from dell_get_intensity.
This change is done using Coccinelle.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/platform/x86/dell-laptop.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index 47fe6264cadf..296cb9632a71 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -2151,11 +2151,17 @@ static int __init dell_init(void)
 
 		dell_backlight_device->props.brightness =
 			dell_get_intensity(dell_backlight_device);
+		if (dell_backlight_device->props.brightness < 0) {
+			ret = dell_backlight_device->props.brightness;
+			goto fail_get_brightness;
+		}
 		backlight_update_status(dell_backlight_device);
 	}
 
 	return 0;
 
+fail_get_brightness:
+	backlight_device_unregister(dell_backlight_device);
 fail_backlight:
 	dell_cleanup_rfkill();
 fail_rfkill: