linux-kernel - [PATCH 3.10 177/319] driver core: Delete an unnecessary check before the function call "put

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Message-Id: <1486322541-8206-78-git-send-email-w@1wt.eu>
Date:   Sun,  5 Feb 2017 20:19:59 +0100
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Markus Elfring <elfring@...rs.sourceforge.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 177/319] driver core: Delete an unnecessary check before the function call "put_device"

From: Markus Elfring <elfring@...rs.sourceforge.net>

commit 5f0163a5ee9cc7c59751768bdfd94a73186debba upstream.

The put_device() 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
[wt: backported only to ease next patch as suggested by Jiri]

Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/base/core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 2a19097..d92ecf3 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1138,8 +1138,7 @@ done:
 	kobject_del(&dev->kobj);
  Error:
 	cleanup_device_parent(dev);
-	if (parent)
-		put_device(parent);
+	put_device(parent);
 name_error:
 	kfree(dev->p);
 	dev->p = NULL;
-- 
2.8.0.rc2.1.gbe9624a