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From: Maxime Ripard <mripard@kernel.org>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	 Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@gmail.com>,
	 Simona Vetter <simona@ffwll.ch>,
	Jonathan Corbet <corbet@lwn.net>,
	 Shuah Khan <skhan@linuxfoundation.org>,
	 Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>,
	 Jyri Sarha <jyri.sarha@iki.fi>,
	 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>,
	 Andrzej Hajda <andrzej.hajda@intel.com>,
	 Neil Armstrong <neil.armstrong@linaro.org>,
	Robert Foss <rfoss@kernel.org>,
	 Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	 Jonas Karlman <jonas@kwiboo.se>,
	Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org,
	 linux-kernel@vger.kernel.org, Maxime Ripard <mripard@kernel.org>
Subject: [PATCH 02/14] drm/atomic: Drop drm_private_state.obj assignment from create_state
Date: Tue, 10 Mar 2026 17:06:54 +0100	[thread overview]
Message-ID: <20260310-drm-mode-config-init-v1-2-de7397c8e1cf@kernel.org> (raw)
In-Reply-To: <20260310-drm-mode-config-init-v1-0-de7397c8e1cf@kernel.org>

The initial intent of the atomic_create_state helper was to simply
allocate a proper drm_private_state and returning it, without any side
effect.

However, the __drm_atomic_helper_private_obj_create_state() introduces a
side effect by setting the drm_private_obj.state to the newly allocated
state.

This assignment defeats the purpose, but is also redundant since
the only caller, drm_atomic_private_obj_init(), will also set this
pointer to the newly allocated state.

Let's drop the assignment in __drm_atomic_helper_private_obj_create_state().

Fixes: e7be39ed1716 ("drm/atomic-helper: Add private_obj atomic_create_state helper")
Signed-off-by: Maxime Ripard <mripard@kernel.org>
---
 drivers/gpu/drm/drm_atomic_state_helper.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic_state_helper.c b/drivers/gpu/drm/drm_atomic_state_helper.c
index bd6faa09f83b498b1417869493f31d876cd13914..323abc9926e084ad595768c06d5c5ee28c22c014 100644
--- a/drivers/gpu/drm/drm_atomic_state_helper.c
+++ b/drivers/gpu/drm/drm_atomic_state_helper.c
@@ -728,12 +728,10 @@ EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state);
 void __drm_atomic_helper_private_obj_create_state(struct drm_private_obj *obj,
 						  struct drm_private_state *state)
 {
 	if (state)
 		state->obj = obj;
-
-	obj->state = state;
 }
 EXPORT_SYMBOL(__drm_atomic_helper_private_obj_create_state);
 
 /**
  * __drm_atomic_helper_private_obj_duplicate_state - copy atomic private state

-- 
2.53.0


  parent reply	other threads:[~2026-03-10 16:07 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-10 16:06 [PATCH 00/14] drm/atomic: Rework initial state allocation Maxime Ripard
2026-03-10 16:06 ` [PATCH 01/14] drm/atomic: Document atomic state lifetime Maxime Ripard
2026-03-11  6:44   ` Tomi Valkeinen
2026-03-16 15:31     ` Laurent Pinchart
2026-03-19 13:20     ` Maxime Ripard
2026-03-10 16:06 ` Maxime Ripard [this message]
2026-03-16 15:49   ` [PATCH 02/14] drm/atomic: Drop drm_private_state.obj assignment from create_state Laurent Pinchart
2026-03-16 17:16     ` Maxime Ripard
2026-03-10 16:06 ` [PATCH 03/14] drm/mode-config: Mention drm_mode_config_reset() culprits Maxime Ripard
2026-03-16 15:53   ` Laurent Pinchart
2026-03-10 16:06 ` [PATCH 04/14] drm/atomic-state-helper: Fix __drm_atomic_helper_plane_reset() doc typo Maxime Ripard
2026-03-11  6:46   ` Tomi Valkeinen
2026-03-16 15:54   ` Laurent Pinchart
2026-03-10 16:06 ` [PATCH 05/14] drm/plane: Add new atomic_create_state callback Maxime Ripard
2026-03-11  7:13   ` Tomi Valkeinen
2026-03-11  7:46     ` Maxime Ripard
2026-03-16 16:16     ` Laurent Pinchart
2026-03-10 16:06 ` [PATCH 06/14] drm/crtc: " Maxime Ripard
2026-03-10 16:06 ` [PATCH 07/14] drm/connector: " Maxime Ripard
2026-03-10 16:07 ` [PATCH 08/14] drm/mode-config: Create drm_mode_config_create_state() Maxime Ripard
2026-03-16 16:32   ` Laurent Pinchart
2026-03-19 14:17     ` Maxime Ripard
2026-03-10 16:07 ` [PATCH 09/14] drm/drv: Call drm_mode_config_create_state() by default Maxime Ripard
2026-03-16 16:33   ` Laurent Pinchart
2026-03-20  7:39     ` Maxime Ripard
2026-03-10 16:07 ` [PATCH 10/14] drm/atomic: Drop private obj state allocation Maxime Ripard
2026-03-16 16:34   ` Laurent Pinchart
2026-03-10 16:07 ` [PATCH 11/14] drm/drv: Drop drm_mode_config_reset() from our skeleton Maxime Ripard
2026-03-11  6:54   ` Tomi Valkeinen
2026-03-10 16:07 ` [PATCH 12/14] drm/tidss: Drop call to drm_mode_config_reset at probe time Maxime Ripard
2026-03-11  7:40   ` Tomi Valkeinen
2026-03-11  8:18     ` Tomi Valkeinen
2026-03-10 16:07 ` [PATCH 13/14] drm/tidss: Convert to atomic_create_state Maxime Ripard
2026-03-11  7:41   ` Tomi Valkeinen
2026-03-16 16:40   ` Laurent Pinchart
2026-03-10 16:07 ` [PATCH 14/14] drm/bridge_connector: " Maxime Ripard
2026-03-16 16:42   ` Laurent Pinchart

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