From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 ABDF216A395 for ; Mon, 6 Oct 2025 20:12:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759781538; cv=none; b=YXCWoeqg+jSWBoE8j7hNJbGM19lE6fgYup8p21lNCcPBLC7vBnqUUANlB5kRhSzwhotv7kwCba/aV+r16WxFQ84o13gexew5R6OKImvxF882I5k976i7Bbd0CDBu2psz3UxYze9g0skz++0wEbZ3p1P41SWKmf0QLc41yk97IZ8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759781538; c=relaxed/simple; bh=fbWv9VHGBvoHkljFwepv3LgJ3nAI0qpJCHi2CcaVi4U=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=IT6jD5f+rfXJIx0RiHKk1p2hzZdMQAA0qkS5U+OTezNE+j87xbVKn0L7dQIUhWdzdny//D61sX+9/wGMWjut1aRxNarmXT7sEDa+BEyJQKp4oik1GT03FIPHCJ4CPPCF/9NPnntN9Emk5yWp6oUr4MQy3Irz5Kixacyliups1GY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=Roau5oA/; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="Roau5oA/" Received: from pps.filterd (m0279865.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 596FmYZ1016586 for ; Mon, 6 Oct 2025 20:12:16 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= kzzfGKAthQsK32eoN+vctDu8EkjUGMKdzeqRRipQt8E=; b=Roau5oA/f0BJNXOr awk9V0RkOdRYyBe1J1CGjENsMDsihPoqtkgqE2o4RVm+JIZ1bJ9ldraBXh0/M8kl Xl6z9I4RmamqqMZuH9eQ9MHjDhWMbMYWjCnfnpE79rv0gv1X3vVb107ls6Q8qztD 5/2ydVwNIV7uhLxQ7sLLxpp1mkwBmhpS5wK/QuYeRIzr6eiHl4rDizC+xVKSey4K cCKZ8e1DNRXLdXdwaRe8Jckq/pK93bhdA/e/1u9gunIGh2JLU4tANiD6xF2PZC5i SjQgI5wl+u81Uk3nUPB9/vu8BynD1H9/+YF6NyT9+0j6Zp8Ty5BIMHa2HdYox3cr zlS1QQ== Received: from mail-pf1-f200.google.com (mail-pf1-f200.google.com [209.85.210.200]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 49jthpw5s0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Mon, 06 Oct 2025 20:12:15 +0000 (GMT) Received: by mail-pf1-f200.google.com with SMTP id d2e1a72fcca58-78117b8e49fso8781952b3a.3 for ; Mon, 06 Oct 2025 13:12:15 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1759781535; x=1760386335; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=kzzfGKAthQsK32eoN+vctDu8EkjUGMKdzeqRRipQt8E=; b=CmJcuuh4jlgNJL1LQtfr5aru2+uJrug1sz4m6VjapfXDYn4f3OW2+ywt2igybeMOTz 3J2i1EbR3mIOOdo9KB7fUa8xDGssWR00FyZ6YWZHcI3PqfLcGiDOOJAAfwFwRejx99uC 7VAk4UhdvpZLuu7Se/rsmNljTIr2xEGN7eMrEpLiWB+URJDRQshFTmV5s/goSPwx3ANs x2FIEbg3wpSgXJE3FDNKbiZB1P91IpYw92IO+yNHNhB61htSpkhAWn7FsUk9zXLLr6hA GWyNbpo7b5nlDUCARI6LG+Xh2fzndHoTgmlQPIEfEkWYY04R5ItIez8joO/rwuS1tw8o DlNQ== X-Forwarded-Encrypted: i=1; AJvYcCVqlB4lbCpMknqUE50xl680s+nMxKGdZnU53ZS8WRiqwrGdb5Q9Ft/Yjmxc+jqx8+vKwSNo7cBJnRXEVPQ=@vger.kernel.org X-Gm-Message-State: AOJu0YzTKgelTirevxak7tX299lJUiY1MaTcAEwudxgV0O+6hqWonS8g 8s/+e18sqJ0kLejOwuDZzLgZ1oiK/FD6cvrIHeQ+07Z8esuoKzWaCWu/q+9+cCAeuAkFyIfqLev lxk8rpNSocNscHlzu1kuO2s2lT3t6DY1yUVVSZG0VhL14dpoct9GhKIT9GIyBqijnfYs= X-Gm-Gg: ASbGncs9emZm66GggTfdgnJiAS39ol6dPEQLDALO/aw3wFPvnUOUGwOkCaJy37KtmJJ CCojmuowdwCpAcabxubLsDHQnpwENQv8G7yLlCjkDybcinp0coaW/bjaMqoC9W0/TOLtXTxnMYh OBGWjmm5nW+RKb+rcf2Wz/T3CraKMUtF22sKfD/pQRSKWha31N2XbKxLsc3EUiWGC2HHrjdrMob zKr/MeB6QuXJJv/sevwhmK3uHr4wlEPZNV4LEZicbXNvupix1FXKJmQGStXLNG0BDNMUh9JYbPt IBZsDsvYm+E72+AvV36nnQPbwqmD/YFTxijWJ6rk8Tv73Kd4S9pR8iyuptv1FVmo3uGkSEA/JK+ B/xAcrKKCXEb403ekJEo= X-Received: by 2002:a05:6a00:1746:b0:781:17ee:610 with SMTP id d2e1a72fcca58-78c98dd9621mr19310700b3a.17.1759781535067; Mon, 06 Oct 2025 13:12:15 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHAZFG8hgyCdPxR6zWs2eZUlAvUOkgVWHAtpD5hAmxgbNzV4Q7WaKJn+d5pIr25u8O4YLH65Q== X-Received: by 2002:a05:6a00:1746:b0:781:17ee:610 with SMTP id d2e1a72fcca58-78c98dd9621mr19310669b3a.17.1759781534579; Mon, 06 Oct 2025 13:12:14 -0700 (PDT) Received: from [10.226.59.182] (i-global254.qualcomm.com. [199.106.103.254]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-78b0206e50esm13321566b3a.62.2025.10.06.13.12.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 06 Oct 2025 13:12:14 -0700 (PDT) Message-ID: Date: Mon, 6 Oct 2025 14:12:12 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] accel/qaic: Replace kcalloc + copy_from_user with memdup_array_user To: Thorsten Blum , Carl Vanderlip , Oded Gabbay Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org References: <20250917124805.90395-2-thorsten.blum@linux.dev> <20250917124805.90395-4-thorsten.blum@linux.dev> Content-Language: en-US From: Jeff Hugo In-Reply-To: <20250917124805.90395-4-thorsten.blum@linux.dev> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: WytMzkx0_AZMYnsFlPCj5aYgvzZ1IWFX X-Authority-Analysis: v=2.4 cv=N5gk1m9B c=1 sm=1 tr=0 ts=68e4229f cx=c_pps a=mDZGXZTwRPZaeRUbqKGCBw==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=IkcTkHD0fZMA:10 a=x6icFKpwvdMA:10 a=EUspDBNiAAAA:8 a=MFX6GGzU5ss6K9bJXPMA:9 a=QEXdDO2ut3YA:10 a=zc0IvFSfCIW2DFIPzwfm:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDA0MDAxNiBTYWx0ZWRfXzWssolSxERPa YiO+9jBChA4zlmHCxRSgisLoU07W5r/C8qyfB/Jn+H+ecz2LyjDx/YDpPODOPUUjzlFCqXtzO1A SqjhFICFr3vnkH2X52pE4wD3RiJELoLSdUee8VVOhgGhk3nJrjIthsOjxbuAKJuuteNZHUOd6Mw Jv+iB8yC1lsf0rHiZPFozIGcov8BWhhsA1Z0XVyYzDSDbUoqGpx/oY3I4iU1HL/eaSWUjGUBBop hV8ACBrJ09GS0Fd7Sujd39osIsOy5dOp9aaOv2MkVoVx3rhogS1QWlErbySp7rnFLz6WqaVickj jSY4g6KE6AcSSSKzviaYH/vV/M74ejaMV8J1ZThxt4Ly5mbEx2dtrtax07HrQYPP1A+2mTqmn3Z /O27dtJJCZfM3ANTurHx9mm49vuoBg== X-Proofpoint-ORIG-GUID: WytMzkx0_AZMYnsFlPCj5aYgvzZ1IWFX X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-10-06_06,2025-10-06_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 malwarescore=0 clxscore=1011 suspectscore=0 adultscore=0 impostorscore=0 phishscore=0 priorityscore=1501 lowpriorityscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2509150000 definitions=main-2510040016 On 9/17/2025 6:48 AM, Thorsten Blum wrote: > Replace kcalloc() followed by copy_from_user() with memdup_array_user() > to improve and simplify both __qaic_execute_bo_ioctl() and > qaic_perf_stats_bo_ioctl(). > > In __qaic_execute_bo_ioctl(), return early if an error occurs and remove > the obsolete 'free_exec' label. > > Since memdup_array_user() already checks for multiplication overflow, > remove the manual check in __qaic_execute_bo_ioctl(). Remove any unused > local variables accordingly. > > Since 'ret = copy_from_user()' has been removed, initialize 'ret = 0' to > preserve the same return value on success. > > No functional changes intended. > > Signed-off-by: Thorsten Blum Reviewed-by: Jeff Hugo