From nobody Sun Feb 8 12:31:33 2026 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C144313FEE for ; Tue, 6 Jan 2026 02:37:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767667080; cv=none; b=LpuVvAh2/A3OM87BaTrpRYyXFDXQERyYoCznbyfvsbUd3HE9ZQUImYZzVfC2ADNbSsOCNR53zdjOfYQksWkNg09R0Ynbxy+g5i4AwiVIqndykGbi00iddq8bhSq//iK/fzC+pCZbj5UhYwDOd17GEaEw+kSd9eXvRnWAbgCvOI8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767667080; c=relaxed/simple; bh=3RNeJpfdkCuix/fk3XB+tdSuTM4Fs7nbsDmriuA79C0=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=SL4BHa4swQl9VpKi9MzYeNz7VpJNcEYPqZKSqNyofFpTXegzLeYzuOKB23UEx84MyQyDlzh0rFudekskiorybtyvEePHeTvxeUTwCDhWiTDF0oX/tHMBEUQ2ouqhHxakxxRf/vymBnA08m46/elUNOFrAB1hiBRpGv9vlnRB524= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=unknown smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=tempfail smtp.mailfrom=kylinos.cn X-UUID: 9cd5be9eeaa811f0a38c85956e01ac42-20260106 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.6,REQID:6a51f9d4-aba6-4ece-adb7-312669357686,IP:0,UR L:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION:r elease,TS:0 X-CID-META: VersionHash:a9d874c,CLOUDID:2a32aa6cde7505f3f31c5a47fec87722,BulkI D:nil,BulkQuantity:0,Recheck:0,SF:102|123|850|898,TC:nil,Content:0|15|50,E DM:-3,IP:nil,URL:0,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA :0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: 9cd5be9eeaa811f0a38c85956e01ac42-20260106 X-User: yaolu@kylinos.cn Received: from localhost.localdomain [(10.44.16.150)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA with TLSv1.3 TLS_AES_256_GCM_SHA384 256/256) with ESMTP id 1113018586; Tue, 06 Jan 2026 10:37:15 +0800 From: yaolu@kylinos.cn To: alexander.deucher@amd.com, christian.koenig@amd.com Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Lu Yao Subject: [PATCH] drm/amdgpu: fix drm panic null pointer when driver not support atomic Date: Tue, 6 Jan 2026 10:37:12 +0800 Message-Id: <20260106023712.54546-1-yaolu@kylinos.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Lu Yao When driver not support atomic, fb using plane->fb rather than plane->state->fb. Fixes: fe151ed7af54 ("drm/amdgpu: add generic display panic helper code") Signed-off-by: Lu Yao --- drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/= amd/amdgpu/amdgpu_display.c index b5d34797d606..52bc04452812 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c @@ -1880,7 +1880,12 @@ int amdgpu_display_get_scanout_buffer(struct drm_pla= ne *plane, struct drm_scanout_buffer *sb) { struct amdgpu_bo *abo; - struct drm_framebuffer *fb =3D plane->state->fb; + struct drm_framebuffer *fb; + + if (drm_drv_uses_atomic_modeset(plane->dev)) + fb =3D plane->state->fb; + else + fb =3D plane->fb; =20 if (!fb) return -EINVAL; --=20 2.25.1