From nobody Sun Feb 8 07:48:13 2026 Received: from cstnet.cn (smtp21.cstnet.cn [159.226.251.21]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 635D91E4B2; Wed, 14 Aug 2024 13:53:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723643632; cv=none; b=XqTa5mI6Y1FsEbtQmZYpF3qxUTsaILbL7t/cO/3sZubOZvOMv+uN2rew01UiyxoGKfPEnnQn7bUQNUMvk8/Q0IDeiLVe1o0yDhjlwB2FShLjW392qWiWwHjEcPDXmRGSt4v84akh7FoHzDpQuEB5I3Y8pL/wkOdPU+JAUJVXwaw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723643632; c=relaxed/simple; bh=6AS+qYUwNebFbttHVuG2nph/lVb1HMXJzLaPkWSC0uQ=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=J0mrMtgJX61D/VI8PgNQGWhYfG8DY4oBZOfwKxTdqOnLbCzTom5cXj6/1Lu8TxmNJ0jl/nj1Pc9eD7Ha4PQkgNenewmMn+VC0wqGvk3xFqZ/jQEAWknWkdTWLscggZNCAZxdkAbQcoaReGlDkOOrVxNMT+bB4zdRLzTksmAGJag= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.21 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from icess-ProLiant-DL380-Gen10.. (unknown [183.174.60.14]) by APP-01 (Coremail) with SMTP id qwCowAD3PsPXtrxm46l4Bg--.47134S2; Wed, 14 Aug 2024 21:53:35 +0800 (CST) From: Ma Ke To: harry.wentland@amd.com, sunpeng.li@amd.com, Rodrigo.Siqueira@amd.com, alexander.deucher@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, mwen@igalia.com, aurabindo.pillai@amd.com, joshua@froggi.es, hamza.mahfooz@amd.com, marek.olsak@amd.com, HaoPing.Liu@amd.com Cc: amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Ma Ke , stable@vger.kernel.org Subject: [PATCH] drm/amd/display: avoid using null object of framebuffer Date: Wed, 14 Aug 2024 21:53:25 +0800 Message-Id: <20240814135325.48117-1-make24@iscas.ac.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 X-CM-TRANSID: qwCowAD3PsPXtrxm46l4Bg--.47134S2 X-Coremail-Antispam: 1UD129KBjvJXoW7CF4xWF4xKw18Ar48KFWUCFg_yoW8Xw43pF sxAFy5Xr1UZF47t347CF1I9FZ0ka93XF1xKrWUuw1Svw15trn8Zws8Grs2gF4xXFWjkw4S qFy7ArW2yF1qvw7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUBF14x267AKxVW5JVWrJwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26r1j6r1xM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4j 6F4UM28EF7xvwVC2z280aVAFwI0_Cr1j6rxdM28EF7xvwVC2z280aVCY1x0267AKxVW0oV Cq3wAac4AC62xK8xCEY4vEwIxC4wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC 0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr 1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IE rcIFxwACI402YVCY1x02628vn2kIc2xKxwCY1x0262kKe7AKxVW8ZVWrXwCF04k20xvY0x 0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E 7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_GFv_WrylIxkGc2Ij64vIr41lIxAIcV C0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF 04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7 CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0pRBVb9UUUUU= X-CM-SenderInfo: ppdnvj2u6l2u1dvotugofq/ Content-Type: text/plain; charset="utf-8" Instead of using state->fb->obj[0] directly, get object from framebuffer by calling drm_gem_fb_get_obj() and return error code when object is null to avoid using null object of framebuffer. Cc: stable@vger.kernel.org Fixes: 5d945cbcd4b1 ("drm/amd/display: Create a file dedicated to planes") Signed-off-by: Ma Ke --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/driv= ers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c index a83bd0331c3b..5cb11cc2d063 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c @@ -28,6 +28,7 @@ #include #include #include +#include #include =20 #include "amdgpu.h" @@ -935,10 +936,14 @@ static int amdgpu_dm_plane_helper_prepare_fb(struct d= rm_plane *plane, } =20 afb =3D to_amdgpu_framebuffer(new_state->fb); - obj =3D new_state->fb->obj[0]; + obj =3D drm_gem_fb_get_obj(new_state->fb, 0); + if (!obj) { + DRM_ERROR("Failed to get obj from framebuffer\n"); + return -EINVAL; + } + rbo =3D gem_to_amdgpu_bo(obj); adev =3D amdgpu_ttm_adev(rbo->tbo.bdev); - r =3D amdgpu_bo_reserve(rbo, true); if (r) { dev_err(adev->dev, "fail to reserve bo (%d)\n", r); --=20 2.25.1