linux-kernel - Re: [PATCH 1/2] memory: tegra: delete unneeded of_node

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Date:	Tue, 14 Jun 2016 11:38:38 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Julia Lawall <Julia.Lawall@...6.fr>
Cc:	Stephen Warren <swarren@...dotorg.org>,
	kernel-janitors@...r.kernel.org,
	Alexandre Courbot <gnurou@...il.com>,
	linux-tegra@...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 1/2] memory: tegra: delete unneeded of_node_put

On Fri, Oct 09, 2015 at 07:47:40PM +0200, Julia Lawall wrote:
> for_each_child_of_node performs an of_node_put on each iteration, so
> putting an of_node_put before a continue results in a double put.
> 
> The semantic match that finds this problem is as follows
> (http://coccinelle.lip6.fr):
> 
> // <smpl>
> @@
> expression root,e;
> local idexpression child;
> iterator name for_each_child_of_node;
> @@
> 
>  for_each_child_of_node(root, child) {
>    ... when != of_node_get(child)
> *  of_node_put(child);
>    ...
> *  continue;
> }
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> 
> ---
>  drivers/memory/tegra/mc.c           |    4 +---
>  drivers/memory/tegra/tegra124-emc.c |    4 +---
>  2 files changed, 2 insertions(+), 6 deletions(-)

Applied, thanks.

Thierry

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