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=-20.2 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 5D373C4321E for ; Mon, 20 Sep 2021 18:39:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 40B9A6126A for ; Mon, 20 Sep 2021 18:39:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353008AbhITSlJ (ORCPT ); Mon, 20 Sep 2021 14:41:09 -0400 Received: from mail.kernel.org ([198.145.29.99]:53062 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1380105AbhITSgX (ORCPT ); Mon, 20 Sep 2021 14:36:23 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0186B61462; Mon, 20 Sep 2021 17:29:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1632158959; bh=R8WwoA9dgNBx8r/MeqzbMfPPh/4rnNix0yGpnXR+tX0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SS4ZGoQ7TI4yUYfjpx4LdoctmXm27J9y5LzfJLeWU7WG8i+N2EOD5iMveljfzllC7 +B3Cdq2cNcV4lQGWyHUpAKMvru6TBP7Bgrs6jzdiIuUmEMLxeOEHfIPUgrPeZk9QS1 yUt4PouEuuzbV9v2DifxTqjqwPG1n2FTEe1kqcCE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Nicholas Kazlauskas , Alex Deucher , Aaron Liu , Harry Wentland Subject: [PATCH 5.14 012/168] drm/amd/display: Fix white screen page fault for gpuvm Date: Mon, 20 Sep 2021 18:42:30 +0200 Message-Id: <20210920163922.056034928@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210920163921.633181900@linuxfoundation.org> References: <20210920163921.633181900@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: Nicholas Kazlauskas commit a70939851f9ced298dc7d523374b8c4d05239caf upstream. [Why] The "base_addr_is_mc_addr" field was added for dcn3.1 support but pa_config was never updated to set it to false. Uninitialized memory causes it to be set to true which results in address mistranslation and white screen. [How] Use memset to ensure all fields are initialized to 0 by default. Fixes: 64b1d0e8d500 ("drm/amd/display: Add DCN3.1 HWSEQ") Signed-off-by: Nicholas Kazlauskas Acked-by: Alex Deucher Acked-by: Aaron Liu Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -998,6 +998,8 @@ static void mmhub_read_system_context(st uint32_t agp_base, agp_bot, agp_top; PHYSICAL_ADDRESS_LOC page_table_start, page_table_end, page_table_base; + memset(pa_config, 0, sizeof(*pa_config)); + logical_addr_low = min(adev->gmc.fb_start, adev->gmc.agp_start) >> 18; pt_base = amdgpu_gmc_pd_addr(adev->gart.bo);