linux-kernel - [PATCH] Input-rmi_bus: Delete an unnecessary check before the function call "of_node

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Date:	Sun, 24 Jul 2016 09:35:56 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	linux-input@...r.kernel.org, Andrew Duggan <aduggan@...aptics.com>,
	Christopher Heiny <cheiny@...aptics.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] Input-rmi_bus: Delete an unnecessary check before the
 function call "of_node_put"

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 24 Jul 2016 07:37:23 +0200

The of_node_put() 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/input/rmi4/rmi_bus.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/input/rmi4/rmi_bus.c b/drivers/input/rmi4/rmi_bus.c
index 253df96..a735806 100644
--- a/drivers/input/rmi4/rmi_bus.c
+++ b/drivers/input/rmi4/rmi_bus.c
@@ -232,10 +232,7 @@ err_put_device:
 void rmi_unregister_function(struct rmi_function *fn)
 {
 	device_del(&fn->dev);
-
-	if (fn->dev.of_node)
-		of_node_put(fn->dev.of_node);
-
+	of_node_put(fn->dev.of_node);
 	put_device(&fn->dev);
 }
 
-- 
2.9.2