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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 A141AC43619 for ; Wed, 12 May 2021 16:12:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8487C61E54 for ; Wed, 12 May 2021 16:12:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234727AbhELQNB (ORCPT ); Wed, 12 May 2021 12:13:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:48196 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233176AbhELPat (ORCPT ); Wed, 12 May 2021 11:30:49 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 127486194F; Wed, 12 May 2021 15:15:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620832554; bh=UtdNivacHThNokihCSBKtp6WYfjbh9GlWT3m3yjRgSU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2Qahg9PvrIWzi7hdJEntT87qkAQAg1A6m/x0gC9xkt4QPOcn8KLLINVpUsiv79ydR 0bb+PmYO2jo+Y9FyYmebCJwu6vILWt/Hoz2BJErDtfYUJB+BMZowsOycadiM28cDf5 rdY8kdeuFm3Mgs84O9yspH3ri0DPk7dQ23Q19KAA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yingjie Wang , Alex Deucher , Sasha Levin Subject: [PATCH 5.10 326/530] drm/radeon: Fix a missing check bug in radeon_dp_mst_detect() Date: Wed, 12 May 2021 16:47:16 +0200 Message-Id: <20210512144830.524382697@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144819.664462530@linuxfoundation.org> References: <20210512144819.664462530@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yingjie Wang [ Upstream commit 25315ebfaefcffd126a266116b37bb8a3d1c4620 ] 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 Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- 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 008308780443..9bd6c0697538 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); } -- 2.30.2