netdev - [PATCH] mdio: mux: fix device_node

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Date:   Fri, 12 May 2017 22:54:23 +0800 (SGT)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     netdev@...r.kernel.org, Jon Mason <jon.mason@...adcom.com>
cc:     Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>, kbuild-all@...org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] mdio: mux: fix device_node_continue.cocci warnings

Device node iterators put the previous value of the index variable, so an
explicit put causes a double put.

In particular, of_mdiobus_register can fail before doing anything
interesting, so one could view it as a no-op from the reference count
point of view.

Generated by: scripts/coccinelle/iterators/device_node_continue.cocci

CC: Jon Mason <jon.mason@...adcom.com>
Signed-off-by: Julia Lawall <julia.lawall@...6.fr>
Signed-off-by: Fengguang Wu <fengguang.wu@...el.com>
---

tree:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
master
head:   8785ded64cfb68b8d8b2583c7c1fc611f99eabf2
commit: b60161668199ac62011c024adc9e66713b9554e7 [13999/14120] mdio: mux:

 mdio-mux.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/net/phy/mdio-mux.c
+++ b/drivers/net/phy/mdio-mux.c
@@ -169,7 +169,6 @@ int mdio_mux_init(struct device *dev,
 		if (r) {
 			mdiobus_free(cb->mii_bus);
 			devm_kfree(dev, cb);
-			of_node_put(child_bus_node);
 		} else {
 			cb->next = pb->children;
 			pb->children = cb;