linux-kernel - [PATCH] fsl/fman: Delete one function call "put_device" in dtsec

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Message-ID: <5697B81E.4050303@users.sourceforge.net>
Date:	Thu, 14 Jan 2016 16:00:46 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Andrew Lunn <andrew@...n.ch>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	"David S. Miller" <davem@...emloft.net>,
	Igal Liberman <igal.liberman@...escale.com>,
	netdev@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] fsl/fman: Delete one function call "put_device" in
 dtsec_config()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 14 Jan 2016 15:46:28 +0100

The Coccinelle semantic patch script "deref_null.cocci" pointed a problem
out in the implementation of the function "dtsec_config".

A null pointer was assigned to the data structure member "tbiphy" of the
variable "dtsec" if a matching device was not found.
A call of the function "put_device" was unnecessary then because
a previous call of the function "get_device" was not triggered.
Thus remove the function call "put_device" after the printing of the
desired error message.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/net/ethernet/freescale/fman/fman_dtsec.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/fman/fman_dtsec.c b/drivers/net/ethernet/freescale/fman/fman_dtsec.c
index 6b1261c..7c92eb8 100644
--- a/drivers/net/ethernet/freescale/fman/fman_dtsec.c
+++ b/drivers/net/ethernet/freescale/fman/fman_dtsec.c
@@ -1434,7 +1434,6 @@ struct fman_mac *dtsec_config(struct fman_mac_params *params)
 	dtsec->tbiphy = of_phy_find_device(params->internal_phy_node);
 	if (!dtsec->tbiphy) {
 		pr_err("of_phy_find_device (TBI PHY) failed\n");
-		put_device(&dtsec->tbiphy->mdio.dev);
 		goto err_dtsec_drv_param;
 	}
 
-- 
2.6.3