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 X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3AF8C433ED for ; Wed, 12 May 2021 09:46:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 832AC613AA for ; Wed, 12 May 2021 09:46:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230134AbhELJrg (ORCPT ); Wed, 12 May 2021 05:47:36 -0400 Received: from wforward2-smtp.messagingengine.com ([64.147.123.31]:47967 "EHLO wforward2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230109AbhELJrf (ORCPT ); Wed, 12 May 2021 05:47:35 -0400 Received: from compute4.internal (compute4.nyi.internal [10.202.2.44]) by mailforward.west.internal (Postfix) with ESMTP id 381BB1311; Wed, 12 May 2021 05:46:25 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute4.internal (MEProxy); Wed, 12 May 2021 05:46:25 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:message-id:mime-version:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm2; bh=/b9O+r jAxRcMg5EBbVpKEo40s0QdSm3lzfWweIH4DYY=; b=vxGd5FEbAcyXhMUuWCNlS6 LjnLkeeiJxneu4+PSHtNBVW009mnQgkCDXOHkQLIoGeRmGL1sEGnqfwQL089YgX9 h+5yWcAANwhc+PbhIIrBQ17888TUsbDCZZTQ4+7HLdsDBVerB5hO1FRItF1+0+Z5 A4FO8J0oz7tlrIWAC+uMuKdbMZ9CE7KEbqQxXH0mXapW1OKfoxzv1s1zEPQrSw9m vo4jzedXH/LZhk1HboPPNN6b7nvyJp60C1XzGfEAmoM5LWkMBqGl9Apr0XX3OWsP kyBl8ksLlUL+qFek7ncX2Htgj5U56uB0c66iZrvaXgfi10vMLet0SWsTOgiGmvDw == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduledrvdehvddgudeiucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucenucfjughrpefuvffhfffkgggtgfesthekredttd dtlfenucfhrhhomhepoehgrhgvghhkhheslhhinhhugihfohhunhgurghtihhonhdrohhr gheqnecuggftrfgrthhtvghrnhepkefhhfefgfefheeffedugeeuvddvvefggffftdduue ejhffhgfevuedtvddtjefgnecuffhomhgrihhnpehfrhgvvgguvghskhhtohhprdhorhhg necukfhppeekfedrkeeirdejgedrieegnecuvehluhhsthgvrhfuihiivgepudenucfrrg hrrghmpehmrghilhhfrhhomhepghhrvghgsehkrhhorghhrdgtohhm X-ME-Proxy: Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 12 May 2021 05:46:23 -0400 (EDT) Subject: FAILED: patch "[PATCH] drm: bridge/panel: Cleanup connector on bridge detach" failed to apply to 4.19-stable tree To: paul@crapouillou.net, Laurent.pinchart@ideasonboard.com, a.hajda@samsung.com, jernej.skrabec@siol.net, jonas@kwiboo.se, laurent.pinchart@ideasonboard.com, narmstrong@baylibre.com, stable@vger.kernel.org Cc: From: Date: Wed, 12 May 2021 11:46:13 +0200 Message-ID: <16208127736999@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 4d906839d321c2efbf3fed4bc31ffd9ff55b75c0 Mon Sep 17 00:00:00 2001 From: Paul Cercueil Date: Sat, 27 Mar 2021 11:57:40 +0000 Subject: [PATCH] drm: bridge/panel: Cleanup connector on bridge detach If we don't call drm_connector_cleanup() manually in panel_bridge_detach(), the connector will be cleaned up with the other DRM objects in the call to drm_mode_config_cleanup(). However, since our drm_connector is devm-allocated, by the time drm_mode_config_cleanup() will be called, our connector will be long gone. Therefore, the connector must be cleaned up when the bridge is detached to avoid use-after-free conditions. v2: Cleanup connector only if it was created v3: Add FIXME v4: (Use connector->dev) directly in if() block Fixes: 13dfc0540a57 ("drm/bridge: Refactor out the panel wrapper from the lvds-encoder bridge.") Cc: # 4.12+ Cc: Andrzej Hajda Cc: Neil Armstrong Cc: Laurent Pinchart Cc: Jonas Karlman Cc: Jernej Skrabec Signed-off-by: Paul Cercueil Reviewed-by: Laurent Pinchart Link: https://patchwork.freedesktop.org/patch/msgid/20210327115742.18986-2-paul@crapouillou.net diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c index 0ddc37551194..c916f4b8907e 100644 --- a/drivers/gpu/drm/bridge/panel.c +++ b/drivers/gpu/drm/bridge/panel.c @@ -87,6 +87,18 @@ static int panel_bridge_attach(struct drm_bridge *bridge, static void panel_bridge_detach(struct drm_bridge *bridge) { + struct panel_bridge *panel_bridge = drm_bridge_to_panel_bridge(bridge); + struct drm_connector *connector = &panel_bridge->connector; + + /* + * Cleanup the connector if we know it was initialized. + * + * FIXME: This wouldn't be needed if the panel_bridge structure was + * allocated with drmm_kzalloc(). This might be tricky since the + * drm_device pointer can only be retrieved when the bridge is attached. + */ + if (connector->dev) + drm_connector_cleanup(connector); } static void panel_bridge_pre_enable(struct drm_bridge *bridge)