linux-kernel - [PATCH 1/1] staging: olpc_dcon: Deletion of a check before backlight_device

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Date:	Mon, 24 Nov 2014 23:03:11 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Daniel Drake <dsd@...top.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jens Frederich <jfrederich@...il.com>,
	Jon Nettleton <jon.nettleton@...il.com>,
	devel@...verdev.osuosl.org
CC:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 1/1] staging: olpc_dcon: Deletion of a check before backlight_device_unregister()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 24 Nov 2014 22:58:48 +0100

The backlight_device_unregister() function tests whether its argument is NULL
and then returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/staging/olpc_dcon/olpc_dcon.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/olpc_dcon/olpc_dcon.c b/drivers/staging/olpc_dcon/olpc_dcon.c
index eb83b28..6a9a881 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon.c
+++ b/drivers/staging/olpc_dcon/olpc_dcon.c
@@ -682,8 +682,7 @@ static int dcon_remove(struct i2c_client *client)
 
 	free_irq(DCON_IRQ, dcon);
 
-	if (dcon->bl_dev)
-		backlight_device_unregister(dcon->bl_dev);
+	backlight_device_unregister(dcon->bl_dev);
 
 	if (dcon_device != NULL)
 		platform_device_unregister(dcon_device);
-- 
2.1.3

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