linux-kernel - Re: [PATCH] drm: fix device_node

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Date:   Fri, 24 Jun 2022 17:26:44 +0200
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     Julia Lawall <julia.lawall@...ia.fr>
Cc:     kbuild-all@...ts.01.org, lkp@...el.com,
        Linux Memory Management List <linux-mm@...ck.org>,
        Maxime Ripard <mripard@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: fix device_node_continue.cocci warnings (fwd)

Hi,

On Fri 24 Jun 22, 17:08, Paul Kocialkowski wrote:
> Hi Julia,
> 
> On Sun 12 Jun 22, 13:02, Julia Lawall wrote:
> > The of_node_put does not seem to be needed.  Note that there is none at
> > the preceeding continues.
> 
> That looks like a correct fix, thanks!

Pushed to drm-misc-next, thanks!

Paul

> > julia
> > 
> > ---------- Forwarded message ----------
> > Date: Sat, 11 Jun 2022 06:02:45 +0800
> > From: kernel test robot <lkp@...el.com>
> > To: kbuild@...ts.01.org
> > Cc: lkp@...el.com, Julia Lawall <julia.lawall@...6.fr>
> > Subject: [PATCH] drm: fix device_node_continue.cocci warnings
> > 
> > CC: kbuild-all@...ts.01.org
> > BCC: lkp@...el.com
> > CC: Linux Memory Management List <linux-mm@...ck.org>
> > TO: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
> > CC: Maxime Ripard <mripard@...nel.org>
> > CC: David Airlie <airlied@...ux.ie>
> > CC: Daniel Vetter <daniel@...ll.ch>
> > CC: dri-devel@...ts.freedesktop.org
> > CC: linux-kernel@...r.kernel.org
> > 
> > From: kernel test robot <lkp@...el.com>
> > 
> > drivers/gpu/drm/logicvc/logicvc_layer.c:616:2-13: ERROR: probable double put.
> > 
> >  Device node iterators put the previous value of the index variable, so an
> >  explicit put causes a double put.
> > 
> > Generated by: scripts/coccinelle/iterators/device_node_continue.cocci
> > 
> > Reported-by: kernel test robot <lkp@...el.com>
> > Signed-off-by: kernel test robot <lkp@...el.com>
> > ---
> > 
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > head:   6d0c806803170f120f8cb97b321de7bd89d3a791
> > commit: efeeaefe9be56e8ae5e5b4e9ff6d2275ec977ec5 [2027/2566] drm: Add support for the LogiCVC display controller
> > :::::: branch date: 17 hours ago
> > :::::: commit date: 31 hours ago
> > 
> > Please take the patch only if it's a positive warning. Thanks!
> > 
> >  drivers/gpu/drm/logicvc/logicvc_layer.c |    2 --
> >  1 file changed, 2 deletions(-)
> > 
> > --- a/drivers/gpu/drm/logicvc/logicvc_layer.c
> > +++ b/drivers/gpu/drm/logicvc/logicvc_layer.c
> > @@ -612,8 +612,6 @@ int logicvc_layers_init(struct logicvc_d
> >  		ret = logicvc_layer_init(logicvc, layer_node, index);
> >  		if (ret)
> >  			goto error;
> > -
> > -		of_node_put(layer_node);
> >  	}
> > 
> >  	of_node_put(layers_node);
> 
> -- 
> Paul Kocialkowski, Bootlin
> Embedded Linux and kernel engineering
> https://bootlin.com



-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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