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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 E37E9C433B4 for ; Wed, 7 Apr 2021 03:46:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC67A6139E for ; Wed, 7 Apr 2021 03:46:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348433AbhDGDrB (ORCPT ); Tue, 6 Apr 2021 23:47:01 -0400 Received: from m15113.mail.126.com ([220.181.15.113]:36907 "EHLO m15113.mail.126.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344405AbhDGDq7 (ORCPT ); Tue, 6 Apr 2021 23:46:59 -0400 X-Greylist: delayed 1997 seconds by postgrey-1.27 at vger.kernel.org; Tue, 06 Apr 2021 23:46:58 EDT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=126.com; s=s110527; h=From:Subject:Date:Message-Id; bh=EYLDIVy5Lq+tCCcmxS 9wSWSpPH1DV1dAdlXfneGhR7w=; b=SPFZZtkE7t/KQmLEIBEGSzC7QSWAYnUt+q dJXipiD05wCV/Jdog3/D7te4YJs/PTjZ2b/vSlR1jfNvYM/ZA4+TimnfMyt7r+vk WDXFuIsVLbs7t0W9EpZ1q+ARzkteO2adkMHyoKBG0rEtkFP2Qw23TgxBlWJukXoi UfJY08/2U= Received: from localhost.localdomain (unknown [106.16.165.72]) by smtp3 (Coremail) with SMTP id DcmowAAHDeGnIm1gdK2IQA--.41702S2; Wed, 07 Apr 2021 11:10:44 +0800 (CST) From: wangyingjie55@126.com To: alexander.deucher@amd.com, christian.koenig@amd.com, airlied@linux.ie, daniel@ffwll.ch, airlied@redhat.com Cc: wangyingjie55@126.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v1] drm/radeon: Fix a missing check bug in radeon_dp_mst_detect() Date: Tue, 6 Apr 2021 20:10:04 -0700 Message-Id: <1617765004-5308-1-git-send-email-wangyingjie55@126.com> X-Mailer: git-send-email 2.7.4 X-CM-TRANSID: DcmowAAHDeGnIm1gdK2IQA--.41702S2 X-Coremail-Antispam: 1Uf129KBjvdXoWrurW8KF4kZrWftr1xKrW3ZFb_yoWkGwbE9r n7Wa4rJayDKryIq3W7Z3WxX3sFgw4j9F1UWr1ftryIqry8Jr1fuF15t3WFyan8Xay7Jrn8 K3WrKFy3Ars3KjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7IUU9XoDUUUUU== X-Originating-IP: [106.16.165.72] X-CM-SenderInfo: 5zdqw5xlqjyxrhvvqiyswou0bp/1tbiVxRtp1pEDOzDMAAAsE Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yingjie Wang In radeon_dp_mst_detect(), We should check whether or not @connector has been unregistered from userspace. If the connector is unregistered, we should return disconnected status. Fixes: 9843ead08f18 ("drm/radeon: add DisplayPort MST support (v2)") Signed-off-by: Yingjie Wang --- drivers/gpu/drm/radeon/radeon_dp_mst.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c index 2c32186c4acd..4e4c937c36c6 100644 --- a/drivers/gpu/drm/radeon/radeon_dp_mst.c +++ b/drivers/gpu/drm/radeon/radeon_dp_mst.c @@ -242,6 +242,9 @@ radeon_dp_mst_detect(struct drm_connector *connector, to_radeon_connector(connector); struct radeon_connector *master = radeon_connector->mst_port; + if (drm_connector_is_unregistered(connector)) + return connector_status_disconnected; + return drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr, radeon_connector->port); } -- 2.7.4