linux-kernel - Re: [PATCH 4/4] power/reset: at91-reset: add missing of_node

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Message-ID: <20151205004235.GD22936@earth>
Date:	Sat, 5 Dec 2015 01:42:36 +0100
From:	Sebastian Reichel <sre@...nel.org>
To:	Julia Lawall <Julia.Lawall@...6.fr>
Cc:	kernel-janitors@...r.kernel.org,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-pm@...r.kernel.org, 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 4/4] power/reset: at91-reset: add missing of_node_put

Hi,

On Wed, Nov 18, 2015 at 11:04:14PM +0100, Julia Lawall wrote:
> for_each_matching_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 e,e1;
> local idexpression np;
> @@
> 
>  for_each_matching_node(np, e1) {
>    ... when != of_node_put(np)
>        when != e = np
> (
>    return np;
> |
> +  of_node_put(np);
> ?  return ...;
> )
>    ...
>  }
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

Thanks, queued.

-- Sebastian

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