linux-kernel - Re: [PATCH 2/4] mtd: nand: sunxi: add missing of_node

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Message-ID: <CAGb2v64R1729v48dBZW15MuBjqJ4vqJGnFPEDgaGDN55mszseA@mail.gmail.com>
Date:	Mon, 23 Nov 2015 15:26:18 +0800
From:	Chen-Yu Tsai <wens@...e.org>
To:	Julia Lawall <Julia.Lawall@...6.fr>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	kernel-janitors@...r.kernel.org,
	Brian Norris <computersforpeace@...il.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Chen-Yu Tsai <wens@...e.org>, linux-mtd@...ts.infradead.org,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Andrew Lunn <andrew@...n.ch>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Jason Cooper <jason@...edaemon.net>
Subject: Re: [PATCH 2/4] mtd: nand: sunxi: add missing of_node_put

On Thu, Nov 19, 2015 at 6:04 AM, Julia Lawall <Julia.Lawall@...6.fr> wrote:
> for_each_child_of_node performs an of_node_get on each iteration, so
> a break out of the loop requires an of_node_put.
>
> A simplified version of the semantic patch that fixes this problem is as
> follows (http://coccinelle.lip6.fr):
>
> // <smpl>
> @@
> expression root,e;
> local idexpression child;
> @@
>
>  for_each_child_of_node(root, child) {
>    ... when != of_node_put(child)
>        when != e = child
> (
>    return child;
> |
> +  of_node_put(child);
> ?  return ...;
> )
>    ...
>  }
> // </smpl>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

Acked-by: Chen-Yu Tsai <wens@...e.org>
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