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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 F0DF7CA5FCB for ; Thu, 1 Oct 2026 12:43:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=fd+170WrMvhaKQWHJoZWuWMeak3P1K3QiRPYIzfMKEw=; b=RChGEiSXalcjvEEqbI+8KG1ZZT N3BBjL27VtAlTzA0ZznB2LShz5FmrFEvWEmGZKC1Uj6SKYQNKzq05YuCX25rBFUFDqwKl8JJNItoD sqGbfPrecjR5xmFsRBXfWC5+eLmS+rp/Oq0WvAAEDwLb2BSNxTtzJJDTqdxrF7PR0PrZ5Eb9Y2Zrg JFuC3vVB4yzk4Yjq47CAWoAzxumOLih2JhGXcy6tCTY7TDGk0hUKs5qOjtBUUTyCP/C20+55JosrR HA7y9l9/SuMMwioUotWJoiSJRouFVEvIMMjUPd9QUFsO/a495N8Zkv0Q0Y1p5YxsHY1e9HDwqyBpp u5YXJeZw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCG8Q-000000096YZ-1zBT; Thu, 01 Oct 2026 12:43:38 +0000 Received: from smtpout-02.galae.net ([185.246.84.56]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCG8M-000000096UU-0kXt for linux-arm-kernel@lists.infradead.org; Thu, 01 Oct 2026 12:43:37 +0000 Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id B1A5F1A24DD; Thu, 1 Oct 2026 12:43:32 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 8145060341; Thu, 1 Oct 2026 12:43:32 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id BC53E10328105; Thu, 1 Oct 2026 14:43:26 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1790858610; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=fd+170WrMvhaKQWHJoZWuWMeak3P1K3QiRPYIzfMKEw=; b=2z6W/aD3WV5Y71R3rAgw7uP/FKIkrJwHL4AZPRDsZtVoxrEFptk/qkBWd5IXrm5IyL482x LDAgjFSJB+V1fxZVRoUZdq8rEkIuZOEgYzpXGZjKjQI+gseI7rd5apbPi2T8lYhdZHZOtc /ffFq7rU2uQyPBJysMUEfwMJZhkMV6EdS76mmmsycfjzNZoLwnjN/sIDwR7XCEctyqrQ8p JF5PU8SyFvPqY2pp5YaKt1xgc8+cumkrtSVXOq2i+21HbAaKHuz7idivMYV6yBmvbEujuW wZzm3xipJlnMmK/bkaRyijbhZH4B2JnJzEJ2angPopud/gQsLOBaoJ3Rbt/liQ== From: Luca Ceresoli Date: Thu, 01 Oct 2026 14:42:30 +0200 Subject: [PATCH RFC v2 08/24] 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: <20261001-drm-bridge-hotplug-v2-8-8e34986dcb68@bootlin.com> References: <20261001-drm-bridge-hotplug-v2-0-8e34986dcb68@bootlin.com> In-Reply-To: <20261001-drm-bridge-hotplug-v2-0-8e34986dcb68@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 , Jessica Zhang , Douglas Anderson , Marek Vasut , Stefan Agner , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Cc: Hui Pu , Ian Ray , Luca Ceresoli , Thomas Petazzoni , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org X-Mailer: b4 0.16.0 X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261001_054335_806959_88B2A132 X-CRM114-Status: UNSURE ( 8.47 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 1b4ee746acb9..cd0c246f7e99 100644 --- a/drivers/gpu/drm/drm_bridge.c +++ b/drivers/gpu/drm/drm_bridge.c @@ -418,6 +418,7 @@ 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; -- 2.55.0