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Date:   Mon, 14 Jan 2019 11:05:56 +0100
From:   Daniel Vetter <daniel@ffwll.ch>
To:     Heiko Stuebner <heiko@sntech.de>
Cc:     Julia Lawall <Julia.Lawall@lip6.fr>,
        Sandy Huang <hjc@rock-chips.com>,
        kernel-janitors@vger.kernel.org, David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        dri-devel@lists.freedesktop.org,
        linux-arm-kernel@lists.infradead.org,
        linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/4] drm/rockchip: add missing of_node_put
Message-ID: <20190114100556.GC10517@phenom.ffwll.local>
Mail-Followup-To: Heiko Stuebner <heiko@sntech.de>,
        Julia Lawall <Julia.Lawall@lip6.fr>,
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        David Airlie <airlied@linux.ie>, dri-devel@lists.freedesktop.org,
        linux-arm-kernel@lists.infradead.org,
        linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org
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On Sun, Jan 13, 2019 at 07:48:49PM +0100, Heiko Stuebner wrote:
> Am Sonntag, 13. Januar 2019, 09:47:43 CET schrieb Julia Lawall:
> > The device node iterators perform an of_node_get on each iteration, so a
> > jump out of the loop requires an of_node_put.
> > 
> > The semantic patch that fixes 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_put(child)
> >        when != e = child
> > +  of_node_put(child);
> > ?  break;
> >    ...
> > }
> > ... when != child
> > // </smpl>
> > 
> > Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
> 
> I've added a fixes+stable tag and applied it to drm-misc-fixes

All of them or just this one here? These cleanup patches have a high
chance of falling through cracks, so taking them all usually works out
better ...
-Daniel

> 
> Thanks for catching that
> Heiko
> 
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch