linux-kernel - Re: [PATCH 1/6] drm/dp_mst: Introduce drm_dp_mst_connector_atomic

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Message-ID: <c6ab617cee62c08ce5f81992e62d92dd6805cf7c.camel@redhat.com>
Date:   Wed, 19 Sep 2018 17:59:13 -0400
From:   Lyude Paul <lyude@...hat.com>
To:     Julia Lawall <julia.lawall@...6.fr>,
        dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org
Cc:     David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, Sean Paul <sean@...rly.run>,
        kbuild-all@...org
Subject: Re: [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@...el.com>
> To: kbuild@...org
> Cc: Julia Lawall <julia.lawall@...6.fr>
> Subject: Re: [PATCH 1/6] drm/dp_mst: Introduce
>     drm_dp_mst_connector_atomic_check()
> 
> CC: kbuild-all@...org
> In-Reply-To: <20180918230637.20700-2-lyude@...hat.com>
> References: <20180918230637.20700-2-lyude@...hat.com>
> TO: Lyude Paul <lyude@...hat.com>
> CC: dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org, 
> intel-gfx@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org
> CC: David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org, 
> stable@...r.kernel.org, Sean Paul <sean@...rly.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
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