From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E4DF14B8DED for ; Tue, 19 May 2026 10:39:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779187180; cv=none; b=OqQoky+X2fEOO6W1Co1+wvqre/RG3r2aZpKmQt+H/THxyICfBganyBBuMtVWMTCduGmztzeHEyKiwZ+lIrUUGdPeiyT1sc9c9qcQ2UtLCf6zTf7YJ+pYktdELgaf6INjoMEDY2SBbLLTr4wCT5nkOrg87dKfcV/i1uGWtmYpdLU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779187180; c=relaxed/simple; bh=ypAF8onyduAdlKexEaakk8l44WdGCnROVdCvJ1bcoxg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=cnlz0kKb5VSG7HoMFmtbpxIv6tuHDH4UY1RFzyhXCbGcX2Tt9UXskQ2WhdWGgwfTThwPQB5/yw8CrjJfo58GuERZ+AWx9OyjMJw1VIP6BR9mIoQrt4hy+pFuyPIomxhqIijPnJwdi2brAAxRh3fitn9QptQoImr6+gg+Id28Hng= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=fds5ptX+; arc=none smtp.client-ip=185.246.84.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="fds5ptX+" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id C25161A3629; Tue, 19 May 2026 10:39:37 +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 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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