From patchwork Wed May 12 14:47:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 438247 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=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 91D2AC18E7B for ; Wed, 12 May 2021 16:19:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6386161D6D for ; Wed, 12 May 2021 16:19:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232263AbhELQS4 (ORCPT ); Wed, 12 May 2021 12:18:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:33672 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233001AbhELQIg (ORCPT ); Wed, 12 May 2021 12:08:36 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5B62761D32; Wed, 12 May 2021 15:39:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620833980; bh=T0ofBlRmITfTrq8t2umcL5RsPFvcecYrVF0mNnNVBq4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ON8iUeYcUTjK5WDiyHZSgeVVJT+27QL/yO0nkVaLr8m7UCrtL1aKVT88Qb3jXRmoE dCk/QTthkO5LFySNkwjjfIJ+Befu+KraNttDuXWqG7qwDlzSVPOn4iqhlDlAEsec4J hLF9jKsiWe2SLNBE40PMyPAEJ/K36XJX9JcVGDCY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Simon Ser , Harry Wentland , Sefa Eyeoglu , Alex Deucher , Sasha Levin Subject: [PATCH 5.11 362/601] drm/amd/display: check fb of primary plane Date: Wed, 12 May 2021 16:47:19 +0200 Message-Id: <20210512144839.725711912@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144827.811958675@linuxfoundation.org> References: <20210512144827.811958675@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sefa Eyeoglu [ Upstream commit 7df4ceb60fa9a3c5160cfd5b696657291934a2c9 ] Sometimes the primary plane might not be initialized (yet), which causes dm_check_crtc_cursor to divide by zero. Apparently a weird state before a S3-suspend causes the aforementioned divide-by-zero error when resuming from S3. This was explained in bug 212293 on Bugzilla. To avoid this divide-by-zero error we check if the primary plane's fb isn't NULL. If it's NULL the src_w and src_h attributes will be 0, which would cause a divide-by-zero. This fixes Bugzilla report 212293 Bug: https://bugzilla.kernel.org/show_bug.cgi?id=212293 Fixes: 12f4849a1cfd69f3 ("drm/amd/display: check cursor scaling") Reviewed-by: Simon Ser Reviewed-by: Harry Wentland Signed-off-by: Sefa Eyeoglu Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index d7d2cf8b53f4..36898ae63f30 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -9119,7 +9119,8 @@ static int dm_check_crtc_cursor(struct drm_atomic_state *state, new_cursor_state = drm_atomic_get_new_plane_state(state, crtc->cursor); new_primary_state = drm_atomic_get_new_plane_state(state, crtc->primary); - if (!new_cursor_state || !new_primary_state || !new_cursor_state->fb) { + if (!new_cursor_state || !new_primary_state || + !new_cursor_state->fb || !new_primary_state->fb) { return 0; }