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Julia Lawall

2018-Sep-19 20:38 UTC

[Nouveau] [PATCH 1/6] drm/dp_mst: Introduce drm_dp_mst_connector_atomic_check() (fwd)

Hello,

I don't think you can update the loop index variable in
list_for_each_entry, because the mcro uses th index variable to get to the
next element.  Perhaps list_for_each_entry_safe would be more suitable?

julia

---------- Forwarded message ----------
Date: Thu, 20 Sep 2018 04:30:13 +0800
From: kbuild test robot <lkp at intel.com>
To: kbuild at 01.org
Cc: Julia Lawall <julia.lawall at lip6.fr>
Subject: Re: [PATCH 1/6] drm/dp_mst: Introduce
    drm_dp_mst_connector_atomic_check()

CC: kbuild-all at 01.org
In-Reply-To: <20180918230637.20700-2-lyude at redhat.com>
References: <20180918230637.20700-2-lyude at redhat.com>
TO: Lyude Paul <lyude at redhat.com>
CC: dri-devel at lists.freedesktop.org, nouveau at lists.freedesktop.org,
intel-gfx at lists.freedesktop.org, amd-gfx at lists.freedesktop.org
CC: David Airlie <airlied at linux.ie>, linux-kernel at vger.kernel.org,
stable at vger.kernel.org, Sean Paul <sean at poorly.run>

Hi Lyude,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-intel/for-linux-next]
[also build test WARNING on v4.19-rc4 next-20180919]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system]

url:   
https://github.com/0day-ci/linux/commits/Lyude-Paul/Fix-legacy-DPMS-changes-with-MST/20180919-203434
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
:::::: branch date: 8 hours ago
:::::: commit date: 8 hours ago
>> drivers/gpu/drm/drm_dp_mst_topology.c:3144:1-20: iterator with update
on line 3145
#
https://github.com/0day-ci/linux/commit/f8df31d5221b9a6da6698d4a37e622253bb17cdc
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout f8df31d5221b9a6da6698d4a37e622253bb17cdc
vim +3144 drivers/gpu/drm/drm_dp_mst_topology.c

3f3353b7 Pandiyan, Dhinakaran 2017-04-20  3131
f8df31d5 Lyude Paul           2018-09-18  3132  static bool
f8df31d5 Lyude Paul           2018-09-18  3133 
drm_dp_mst_connector_still_exists(struct drm_connector *connector,
f8df31d5 Lyude Paul           2018-09-18  3134  				  struct
drm_dp_mst_topology_mgr *mgr,
f8df31d5 Lyude Paul           2018-09-18  3135  				  struct drm_dp_mst_branch
*mstb)
f8df31d5 Lyude Paul           2018-09-18  3136  {
f8df31d5 Lyude Paul           2018-09-18  3137  	struct drm_dp_mst_port *port;
f8df31d5 Lyude Paul           2018-09-18  3138  	bool exists = false;
f8df31d5 Lyude Paul           2018-09-18  3139
f8df31d5 Lyude Paul           2018-09-18  3140  	mstb =
drm_dp_get_validated_mstb_ref(mgr, mstb);
f8df31d5 Lyude Paul           2018-09-18  3141  	if (!mstb)
f8df31d5 Lyude Paul           2018-09-18  3142  		return false;
f8df31d5 Lyude Paul           2018-09-18  3143
f8df31d5 Lyude Paul           2018-09-18 @3144  	list_for_each_entry(port,
&mstb->ports, next) {
f8df31d5 Lyude Paul           2018-09-18 @3145  		port =
drm_dp_get_validated_port_ref(mgr, port);
f8df31d5 Lyude Paul           2018-09-18  3146  		if (!port)
f8df31d5 Lyude Paul           2018-09-18  3147  			continue;
f8df31d5 Lyude Paul           2018-09-18  3148
f8df31d5 Lyude Paul           2018-09-18  3149  		exists = (port->connector
== connector ||
f8df31d5 Lyude Paul           2018-09-18  3150  			  (port->mstb &&
f8df31d5 Lyude Paul           2018-09-18  3151  			  
drm_dp_mst_connector_still_exists(connector, mgr,
f8df31d5 Lyude Paul           2018-09-18  3152  							     port->mstb)));
f8df31d5 Lyude Paul           2018-09-18  3153
f8df31d5 Lyude Paul           2018-09-18  3154  		drm_dp_put_port(port);
f8df31d5 Lyude Paul           2018-09-18  3155  		if (exists)
f8df31d5 Lyude Paul           2018-09-18  3156  			break;
f8df31d5 Lyude Paul           2018-09-18  3157  	}
f8df31d5 Lyude Paul           2018-09-18  3158
f8df31d5 Lyude Paul           2018-09-18  3159  
drm_dp_put_mst_branch_device(mstb);
f8df31d5 Lyude Paul           2018-09-18  3160  	return exists;
f8df31d5 Lyude Paul           2018-09-18  3161  }
f8df31d5 Lyude Paul           2018-09-18  3162

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Lyude Paul

2018-Sep-19 21:59 UTC

head link

[Nouveau] [PATCH 1/6] drm/dp_mst: Introduce drm_dp_mst_connector_atomic_check() (fwd)

oh, good catch! will fix and respin in just a little bit

On Wed, 2018-09-19 at 22:38 +0200, Julia Lawall wrote:> Hello,
> 
> I don't think you can update the loop index variable in
> list_for_each_entry, because the mcro uses th index variable to get to the
> next element.  Perhaps list_for_each_entry_safe would be more suitable?
> 
> julia
> 
> ---------- Forwarded message ----------
> Date: Thu, 20 Sep 2018 04:30:13 +0800
> From: kbuild test robot <lkp at intel.com>
> To: kbuild at 01.org
> Cc: Julia Lawall <julia.lawall at lip6.fr>
> Subject: Re: [PATCH 1/6] drm/dp_mst: Introduce
>     drm_dp_mst_connector_atomic_check()
> 
> CC: kbuild-all at 01.org
> In-Reply-To: <20180918230637.20700-2-lyude at redhat.com>
> References: <20180918230637.20700-2-lyude at redhat.com>
> TO: Lyude Paul <lyude at redhat.com>
> CC: dri-devel at lists.freedesktop.org, nouveau at lists.freedesktop.org, 
> intel-gfx at lists.freedesktop.org, amd-gfx at lists.freedesktop.org
> CC: David Airlie <airlied at linux.ie>, linux-kernel at
vger.kernel.org,
> stable at vger.kernel.org, Sean Paul <sean at poorly.run>
> 
> Hi Lyude,
> 
> Thank you for the patch! Perhaps something to improve:
> 
> [auto build test WARNING on drm-intel/for-linux-next]
> [also build test WARNING on v4.19-rc4 next-20180919]
> [if your patch is applied to the wrong git tree, please drop us a note to
help
> improve the system]
> 
> url:    
>
https://github.com/0day-ci/linux/commits/Lyude-Paul/Fix-legacy-DPMS-changes-with-MST/20180919-203434
> base:   git://anongit.freedesktop.org/drm-intel for-linux-next
> :::::: branch date: 8 hours ago
> :::::: commit date: 8 hours ago
> 
> > > drivers/gpu/drm/drm_dp_mst_topology.c:3144:1-20: iterator with
update on
> > > line 3145
> 
> # 
>
https://github.com/0day-ci/linux/commit/f8df31d5221b9a6da6698d4a37e622253bb17cdc
> git remote add linux-review https://github.com/0day-ci/linux
> git remote update linux-review
> git checkout f8df31d5221b9a6da6698d4a37e622253bb17cdc
> vim +3144 drivers/gpu/drm/drm_dp_mst_topology.c
> 
> 3f3353b7 Pandiyan, Dhinakaran 2017-04-20  3131
> f8df31d5 Lyude Paul           2018-09-18  3132  static bool
> f8df31d5 Lyude Paul           2018-09-
> 18  3133  drm_dp_mst_connector_still_exists(struct drm_connector
*connector,
> f8df31d5 Lyude Paul           2018-09-18  3134  				
>   struct drm_dp_mst_topology_mgr *mgr,
> f8df31d5 Lyude Paul           2018-09-18  3135  				
>   struct drm_dp_mst_branch *mstb)
> f8df31d5 Lyude Paul           2018-09-18  3136  {
> f8df31d5 Lyude Paul           2018-09-18  3137  	struct drm_dp_mst_port
> *port;
> f8df31d5 Lyude Paul           2018-09-18  3138  	bool exists = false;
> f8df31d5 Lyude Paul           2018-09-18  3139
> f8df31d5 Lyude Paul           2018-09-18  3140  	mstb >
drm_dp_get_validated_mstb_ref(mgr, mstb);
> f8df31d5 Lyude Paul           2018-09-18  3141  	if (!mstb)
> f8df31d5 Lyude Paul           2018-09-18  3142  		return false;
> f8df31d5 Lyude Paul           2018-09-18  3143
> f8df31d5 Lyude Paul           2018-09-18 @3144  	list_for_each_entry(port
> , &mstb->ports, next) {
> f8df31d5 Lyude Paul           2018-09-18 @3145  		port >
drm_dp_get_validated_port_ref(mgr, port);
> f8df31d5 Lyude Paul           2018-09-18  3146  		if (!port)
> f8df31d5 Lyude Paul           2018-09-18  3147  			continue
> ;
> f8df31d5 Lyude Paul           2018-09-18  3148
> f8df31d5 Lyude Paul           2018-09-18  3149  		exists = (port-
> >connector == connector ||
> f8df31d5 Lyude Paul           2018-09-18  3150  			  (port-
> >mstb &&
> f8df31d5 Lyude Paul           2018-09-18  3151  			   drm_d
> p_mst_connector_still_exists(connector, mgr,
> f8df31d5 Lyude Paul           2018-09-18  3152  					
> 		     port->mstb)));
> f8df31d5 Lyude Paul           2018-09-18  3153
> f8df31d5 Lyude Paul           2018-09-18  3154  		drm_dp_put_port(
> port);
> f8df31d5 Lyude Paul           2018-09-18  3155  		if (exists)
> f8df31d5 Lyude Paul           2018-09-18  3156  			break;
> f8df31d5 Lyude Paul           2018-09-18  3157  	}
> f8df31d5 Lyude Paul           2018-09-18  3158
> f8df31d5 Lyude Paul           2018-09-18  3159  	drm_dp_put_mst_branch_de
> vice(mstb);
> f8df31d5 Lyude Paul           2018-09-18  3160  	return exists;
> f8df31d5 Lyude Paul           2018-09-18  3161  }
> f8df31d5 Lyude Paul           2018-09-18  3162
> 
> ---
> 0-DAY kernel test infrastructure                Open Source Technology
Center
> https://lists.01.org/pipermail/kbuild-all                   Intel
Corporation

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