linux-kernel - Re: [PATCH v2] net: dsa: fix a leaked reference by adding missing of_node

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Date:   Mon, 25 Feb 2019 09:35:20 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     wen.yang99@....com.cn
Cc:     andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        wang.yi59@....com.cn
Subject: Re: [PATCH v2] net: dsa: fix a leaked reference by adding missing
 of_node_put

From: Wen Yang <wen.yang99@....com.cn>
Date: Mon, 25 Feb 2019 15:22:19 +0800

> The call to of_parse_phandle returns a node pointer with refcount
> incremented thus it must be explicitly decremented after the last
> usage.
> 
> Detected by coccinelle with the following warnings:
> ./net/dsa/port.c:294:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 284, but without a corresponding object release within this function.
> ./net/dsa/dsa2.c:627:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function.
> ./net/dsa/dsa2.c:630:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function.
> ./net/dsa/dsa2.c:636:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function.
> ./net/dsa/dsa2.c:639:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function.
> 
> Signed-off-by: Wen Yang <wen.yang99@....com.cn>
> Reviewed-by: Vivien Didelot <vivien.didelot@...il.com>
> Reviewed-by: "David S. Miller" <davem@...emloft.net>

Applied.