linux-kernel - [PATCH 3.12 001/235] driver core: Delete an unnecessary check before the function call "put

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Date:   Fri, 27 Jan 2017 11:52:14 +0100
From:   Jiri Slaby <jslaby@...e.cz>
To:     stable@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Markus Elfring <elfring@...rs.sourceforge.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 001/235] driver core: Delete an unnecessary check before the function call "put_device"

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

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

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>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 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 944fecd32e9f..90458b1719a8 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1185,8 +1185,7 @@ 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;
-- 
2.11.0