linux-kernel - Re: [PATCH 22/29] drm/bridge: Rename atomic hooks parameters to drop old prefix

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250117-magpie-of-unreal-pride-efb244@houat>
Date: Fri, 17 Jan 2025 15:50:09 +0100
From: Maxime Ripard <mripard@...nel.org>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, Andrzej Hajda <andrzej.hajda@...el.com>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, 
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>, Jonas Karlman <jonas@...boo.se>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, Douglas Anderson <dianders@...omium.org>, 
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 22/29] drm/bridge: Rename atomic hooks parameters to drop
 old prefix

On Thu, Jan 16, 2025 at 12:34:12PM +0100, Simona Vetter wrote:
> On Wed, Jan 15, 2025 at 10:05:29PM +0100, Maxime Ripard wrote:
> > All the bridge atomic hooks were using the old_bridge_state name for
> > their drm_bridge_state parameter. However, this state is the current
> > state being committed for all of them, which ends up being confusing.
> > 
> > Let's rename it to bridge_state for all of them.
> > 
> > Signed-off-by: Maxime Ripard <mripard@...nel.org>
> > ---
> >  include/drm/drm_bridge.h | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
> > index 4b84faf14e368310dd20aa964e8178ec80aa6fa7..8e18130be8bb85fc2463917dde9bf1d281934184 100644
> > --- a/include/drm/drm_bridge.h
> > +++ b/include/drm/drm_bridge.h
> > @@ -303,11 +303,11 @@ struct drm_bridge_funcs {
> >  	 * there is one) when this callback is called.
> >  	 *
> >  	 * The @atomic_pre_enable callback is optional.
> >  	 */
> >  	void (*atomic_pre_enable)(struct drm_bridge *bridge,
> > -				  struct drm_bridge_state *old_bridge_state);
> > +				  struct drm_bridge_state *bridge_state);
> >  
> >  	/**
> >  	 * @atomic_enable:
> >  	 *
> >  	 * This callback should enable the bridge. It is called right after
> > @@ -323,11 +323,11 @@ struct drm_bridge_funcs {
> >  	 * chain if there is one.
> >  	 *
> >  	 * The @atomic_enable callback is optional.
> >  	 */
> >  	void (*atomic_enable)(struct drm_bridge *bridge,
> > -			      struct drm_bridge_state *old_bridge_state);
> > +			      struct drm_bridge_state *bridge_state);
> 
> Checked this one, and it very clearly passes the old state.

Urgh, you're right

> Because the new state you can get by looking at bridge->state.

Bridge->state doesn't exist though.

> So this looks very wrong.
> 
> If you want to fully update the pattern, pass the drm_atomic_state
> instead, and let callbacks lookup any additional states they use as
> needed.

Yeah, that's probably the best option. I think I still have the
coccinelle scripts I used for the others somewhere.

Thanks!
Maxime

Download attachment "signature.asc" of type "application/pgp-signature" (274 bytes)