linux-kernel - [PATCH v6 06/21] drm/bridge: lt8912b: Register and attach our DSI device at probe

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: <20211025151536.1048186-7-maxime@cerno.tech>
Date:   Mon, 25 Oct 2021 17:15:21 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Thierry Reding <thierry.reding@...il.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Andrzej Hajda <a.hajda@...sung.com>,
        Robert Foss <robert.foss@...aro.org>,
        Jonas Karlman <jonas@...boo.se>,
        Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maxime Ripard <maxime@...no.tech>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Neil Armstrong <narmstrong@...libre.com>
Cc:     Seung-Woo Kim <sw0312.kim@...sung.com>,
        linux-arm-msm@...r.kernel.org,
        Joonyoung Shim <jy0922.shim@...sung.com>,
        Rob Clark <robdclark@...il.com>,
        Tian Tao <tiantao6@...ilicon.com>,
        Chen Feng <puck.chen@...ilicon.com>,
        Xinwei Kong <kong.kongxinwei@...ilicon.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        linux-samsung-soc@...r.kernel.org,
        Xinliang Liu <xinliang.liu@...aro.org>,
        John Stultz <john.stultz@...aro.org>,
        linux-kernel@...r.kernel.org, Inki Dae <inki.dae@...sung.com>,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        Sean Paul <sean@...rly.run>
Subject: [PATCH v6 06/21] drm/bridge: lt8912b: Register and attach our DSI device at probe

In order to avoid any probe ordering issue, the best practice is to move
the secondary MIPI-DSI device registration and attachment to the
MIPI-DSI host at probe time. Let's do this.

Acked-by: Sam Ravnborg <sam@...nborg.org>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 drivers/gpu/drm/bridge/lontium-lt8912b.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/lontium-lt8912b.c b/drivers/gpu/drm/bridge/lontium-lt8912b.c
index cc968d65936b..c642d1e02b2f 100644
--- a/drivers/gpu/drm/bridge/lontium-lt8912b.c
+++ b/drivers/gpu/drm/bridge/lontium-lt8912b.c
@@ -544,10 +544,6 @@ static int lt8912_bridge_attach(struct drm_bridge *bridge,
 	if (ret)
 		goto error;
 
-	ret = lt8912_attach_dsi(lt);
-	if (ret)
-		goto error;
-
 	lt->is_attached = true;
 
 	return 0;
@@ -706,8 +702,15 @@ static int lt8912_probe(struct i2c_client *client,
 
 	drm_bridge_add(&lt->bridge);
 
+	ret = lt8912_attach_dsi(lt);
+	if (ret)
+		goto err_attach;
+
 	return 0;
 
+err_attach:
+	drm_bridge_remove(&lt->bridge);
+	lt8912_free_i2c(lt);
 err_i2c:
 	lt8912_put_dt(lt);
 err_dt_parse:
-- 
2.31.1