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[PATCH] drm: fix device_node_continue.cocci warnings (fwd)

Julia Lawall posted 1 patch 3 years, 10 months ago 
drivers/gpu/drm/logicvc/logicvc_layer.c |    2 --
1 file changed, 2 deletions(-)
[PATCH] drm: fix device_node_continue.cocci warnings (fwd)
Posted by Julia Lawall 3 years, 10 months ago 
The of_node_put does not seem to be needed.  Note that there is none at
the preceeding continues.

julia

---------- Forwarded message ----------
Date: Sat, 11 Jun 2022 06:02:45 +0800
From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Cc: lkp@intel.com, Julia Lawall <julia.lawall@lip6.fr>
Subject: [PATCH] drm: fix device_node_continue.cocci warnings

CC: kbuild-all@lists.01.org
BCC: lkp@intel.com
CC: Linux Memory Management List <linux-mm@kvack.org>
TO: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
CC: Maxime Ripard <mripard@kernel.org>
CC: David Airlie <airlied@linux.ie>
CC: Daniel Vetter <daniel@ffwll.ch>
CC: dri-devel@lists.freedesktop.org
CC: linux-kernel@vger.kernel.org

From: kernel test robot <lkp@intel.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@intel.com>
Signed-off-by: kernel test robot <lkp@intel.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);
Re: [PATCH] drm: fix device_node_continue.cocci warnings (fwd)
Posted by Paul Kocialkowski 3 years, 10 months ago 
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!

Paul
 
> julia
> 
> ---------- Forwarded message ----------
> Date: Sat, 11 Jun 2022 06:02:45 +0800
> From: kernel test robot <lkp@intel.com>
> To: kbuild@lists.01.org
> Cc: lkp@intel.com, Julia Lawall <julia.lawall@lip6.fr>
> Subject: [PATCH] drm: fix device_node_continue.cocci warnings
> 
> CC: kbuild-all@lists.01.org
> BCC: lkp@intel.com
> CC: Linux Memory Management List <linux-mm@kvack.org>
> TO: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
> CC: Maxime Ripard <mripard@kernel.org>
> CC: David Airlie <airlied@linux.ie>
> CC: Daniel Vetter <daniel@ffwll.ch>
> CC: dri-devel@lists.freedesktop.org
> CC: linux-kernel@vger.kernel.org
> 
> From: kernel test robot <lkp@intel.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@intel.com>
> Signed-off-by: kernel test robot <lkp@intel.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
Re: [PATCH] drm: fix device_node_continue.cocci warnings (fwd)
Posted by Paul Kocialkowski 3 years, 10 months ago 
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@intel.com>
> > To: kbuild@lists.01.org
> > Cc: lkp@intel.com, Julia Lawall <julia.lawall@lip6.fr>
> > Subject: [PATCH] drm: fix device_node_continue.cocci warnings
> > 
> > CC: kbuild-all@lists.01.org
> > BCC: lkp@intel.com
> > CC: Linux Memory Management List <linux-mm@kvack.org>
> > TO: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
> > CC: Maxime Ripard <mripard@kernel.org>
> > CC: David Airlie <airlied@linux.ie>
> > CC: Daniel Vetter <daniel@ffwll.ch>
> > CC: dri-devel@lists.freedesktop.org
> > CC: linux-kernel@vger.kernel.org
> > 
> > From: kernel test robot <lkp@intel.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@intel.com>
> > Signed-off-by: kernel test robot <lkp@intel.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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