From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.20]) (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 BE7302882D6; Mon, 16 Jun 2025 03:26:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.20 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750044381; cv=none; b=VCnjztcMxMjWZkz8upM4T1FTXllryMqv9qjX0IAhWrhEkcVRTN6eXq8RaEBDWnzodfATMxPa2B4HZ7ZLLe7tU5HKQfxgSXM2pykPGexP3Ex89QNR9srHMM0x/UcL6wtGs1CrFHgQiRrdftp3aRldOKS4wBgfqNj/FCpLW4wQdWw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750044381; c=relaxed/simple; bh=uKnRFTsk+pJYACVZEJSmxbfKFT2sXQF4jSkIx9+DZxw=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=jpNb/q9yMjkYFIRUT+w26Oojn1HI2NcDHfU8AXs/wcqZXFqJNUqIa/KNSI//h/b51C5H2GqU/EvYu1xrenKIW9ylfuFPPkjKMbkTE0+FG93KVwXOI+0PDwphmgas15EzXdOgDSfbyfnx/InA/xAi57VwjfoFYBBprssqQ7Ar1uY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=SRDvVBpu; arc=none smtp.client-ip=198.175.65.20 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="SRDvVBpu" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1750044380; x=1781580380; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=uKnRFTsk+pJYACVZEJSmxbfKFT2sXQF4jSkIx9+DZxw=; b=SRDvVBpueQFzCjdib6tAXdyhCmanouW+GWzZ+zD59F+b6WfSXvC21Ieq 2gvKQx6Scd1raAXnSZql6Iryj+CXrF8qL4zMrf/QNDh8gynFHTShKjZUX eu6qy7ukLpfEv32/pYJz0BKrvm73if4se7CaKYEaiBVrxNNSsWyXywxE6 m04phMTR/5fgFRZQD3YMccLkODhp0AtdHt/zWl77d5O5OKhQXrfoc7czN dyM4uAi5mAb+ZxKwYKgOlN2eV/jchn6sRfW6i37MLoX/27XnZcFuKtl6G K8TvJVpF/fmSiPGY5UU0shQigt9rjUZjbzlb2w0PVbJe/E2x6gRhQ4pTJ w==; X-CSE-ConnectionGUID: 9RsJ4vQcRH2JTbIH6rHSLA== X-CSE-MsgGUID: OPgT1uAaSf2YCDpFBuvtqw== X-IronPort-AV: E=McAfee;i="6800,10657,11465"; a="51889505" X-IronPort-AV: E=Sophos;i="6.16,240,1744095600"; d="scan'208";a="51889505" Received: from orviesa008.jf.intel.com ([10.64.159.148]) by orvoesa112.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Jun 2025 20:26:19 -0700 X-CSE-ConnectionGUID: prVbeiNhTtmc4WoRu38u7g== X-CSE-MsgGUID: Efe+tMqcRKuc4eAWZkWqSQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,240,1744095600"; d="scan'208";a="149229808" Received: from allen-sbox.sh.intel.com (HELO [10.239.159.30]) ([10.239.159.30]) by orviesa008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Jun 2025 20:26:15 -0700 Message-ID: <118a918f-d549-4a19-8636-3bed2a670852@linux.intel.com> Date: Mon, 16 Jun 2025 11:25:16 +0800 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 05/14] iommufd: Return EOPNOTSUPP for failures due to driver bugs To: Nicolin Chen , jgg@nvidia.com, kevin.tian@intel.com Cc: will@kernel.org, robin.murphy@arm.com, joro@8bytes.org, praan@google.com, yi.l.liu@intel.com, peterz@infradead.org, jsnitsel@redhat.com, linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, patches@lists.linux.dev References: <623bb6f0e8fdd7b9c5745a2f99f280163f9f1f5a.1749882255.git.nicolinc@nvidia.com> Content-Language: en-US From: Baolu Lu In-Reply-To: <623bb6f0e8fdd7b9c5745a2f99f280163f9f1f5a.1749882255.git.nicolinc@nvidia.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 6/14/25 14:35, Nicolin Chen wrote: > It's more accurate to report EOPNOTSUPP when an ioctl failed due to driver > bug, since there is nothing wrong with the user space side. > > Signed-off-by: Nicolin Chen Reviewed-by: Lu Baolu