From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 32CA8CD4F57 for ; Tue, 19 May 2026 10:39:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 84D8710EC39; Tue, 19 May 2026 10:39:40 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=bootlin.com header.i=@bootlin.com header.b="fds5ptX+"; dkim-atps=neutral Received: from smtpout-04.galae.net (smtpout-04.galae.net [185.171.202.116]) by gabe.freedesktop.org (Postfix) with ESMTPS id DC57A10EC39 for ; Tue, 19 May 2026 10:39:38 +0000 (UTC) Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-04.galae.net (Postfix) with ESMTPS id BFB61C2B9DB; Tue, 19 May 2026 10:40:30 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 95B0B606E9; Tue, 19 May 2026 10:39:37 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 1F29C107E8AEA; Tue, 19 May 2026 12:39:31 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1779187175; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=Sao0yuOn9cKu8y1mwI62QTwKuextTxc4wrqkEYzJgG8=; b=fds5ptX+ISSKYE732a+mWt2C3yJ0bk/EOQU5Yg8lFWoWyvrrpHoft9W6zIvZp0p1qS/+Pj u2RTS20ixBQv2nQhXkkimN9FDNyYOQhlrO86b9HmB6xDbZESgY6d07ajiaLmcpsnh7UV5u lRSIl1YZyPCRT7fqlZNjB3BtFSWV1edY4ZN0v3JoYJYTd4eNDmJDoWbkBPq8jP9qyek1eu 7z9tc9phH/NEJ4nXXVR8L7kmBHrbKyjKulqYnXnkVUY6VrzavivWqWJtHfqTogVgDfxDdJ aePNkGH1yIdz5mpmp/IOM0FwuzVV9HxIii1pXp6X8L2vw2VvSbbpGTQi8lHqtA== From: Luca Ceresoli Date: Tue, 19 May 2026 12:37:38 +0200 Subject: [PATCH 21/37] drm/bridge: initialize chain_node list head on allocation MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260519-drm-bridge-hotplug-v1-21-45e2bdb3dfb4@bootlin.com> References: <20260519-drm-bridge-hotplug-v1-0-45e2bdb3dfb4@bootlin.com> In-Reply-To: <20260519-drm-bridge-hotplug-v1-0-45e2bdb3dfb4@bootlin.com> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Inki Dae , Jagan Teki , Marek Szyprowski , Marek Vasut , Stefan Agner , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Cc: Hui Pu , Ian Ray , Thomas Petazzoni , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Luca Ceresoli X-Mailer: b4 0.15.2 X-Last-TLS-Session-Version: TLSv1.3 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" In preparation to add a check to detect whether a bridge is not yet attached, ensure the chain_node list_head is always empty [as in list_empty()] since it is allocated, until it is attached. Signed-off-by: Luca Ceresoli --- drivers/gpu/drm/drm_bridge.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c index 687b36eea0c7..657f6609d7b1 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -378,6 +378,7 @@ void *__devm_drm_bridge_alloc(struct device *dev, size_t size, size_t offset, return ERR_PTR(-ENOMEM); bridge = container + offset; + INIT_LIST_HEAD(&bridge->chain_node); INIT_LIST_HEAD(&bridge->list); bridge->container = container; bridge->funcs = funcs; -- 2.54.0