From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1C90AC25B08 for ; Wed, 17 Aug 2022 10:35:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234592AbiHQKfB (ORCPT ); Wed, 17 Aug 2022 06:35:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41312 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229705AbiHQKe7 (ORCPT ); Wed, 17 Aug 2022 06:34:59 -0400 Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80A9B51A33 for ; Wed, 17 Aug 2022 03:34:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1660732498; x=1692268498; h=message-id:date:mime-version:cc:subject:to:references: from:in-reply-to:content-transfer-encoding; bh=WDCWwFNC4pSlrtLv+pJZJTESXKf8+WkfSayMR/BUY90=; b=UOF0AJLY8nKVPWwGTa4lqcn7In75T5+ois0MvvvB78fcMH7BY8D4JgqH FvAHG2xpJHlgIIQ/vamo03wDHb/157Y90skInzujQyeFRFrrMEeBwsKgQ dm1FNHgIYrSKWqDoxb86aaS5ATkEqZbBwLcUhcr2TAU+CtIXEgxMt4BQN aZO6GxoTi6tazOg4E0DuLrcbRgEjZUQFobnTAPaKq5O7v3dG0kWbT4Gez 9o6Lq51BN6Ens+PiCx5CrRnWYoiyI8ub5mL7hLnZzU91do6Vv2aYqrKKc UCBDInsC9DkJ5Uu1i28+Yvuz9V3FQIheat9CUXQxMTTbhOQWxFD69DH4c w==; X-IronPort-AV: E=McAfee;i="6400,9594,10441"; a="356456887" X-IronPort-AV: E=Sophos;i="5.93,242,1654585200"; d="scan'208";a="356456887" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Aug 2022 03:34:57 -0700 X-IronPort-AV: E=Sophos;i="5.93,242,1654585200"; d="scan'208";a="667559585" Received: from jzhan60-mobl1.ccr.corp.intel.com (HELO [10.254.209.228]) ([10.254.209.228]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Aug 2022 03:34:56 -0700 Message-ID: <50b8489c-bd93-c8ae-cd92-af429ae762b0@linux.intel.com> Date: Wed, 17 Aug 2022 18:34:54 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Cc: baolu.lu@linux.intel.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH -next] iommu: return early when devices in a group require different domain type Content-Language: en-US To: Yuan Can , joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, iommu@lists.linux.dev References: <20220816020701.90533-1-yuancan@huawei.com> From: Baolu Lu In-Reply-To: <20220816020701.90533-1-yuancan@huawei.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2022/8/16 10:07, Yuan Can wrote: > When alloc default domain for an iommu_group in > probe_alloc_default_domain, the expected domain > type of each device in the iommu_group is checked > in a loop, if two devices require different types, > the loop can be breaked since the default domain > will be set to iommu_def_domain_type. > Return 1 when this happened to break the loop in > __iommu_group_for_each_dev. > > Signed-off-by: Yuan Can Nit: Try to use up the allowed number of characters per line before wrapping and use "./scripts/checkpatch.pl --strict --codespell _your_patch_file" to check the patch. For the change: Reviewed-by: Lu Baolu Best regards, baolu > --- > drivers/iommu/iommu.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c > index 74bc9111c7be..0d4d78946d31 100644 > --- a/drivers/iommu/iommu.c > +++ b/drivers/iommu/iommu.c > @@ -1653,6 +1653,7 @@ static int probe_get_default_domain_type(struct device *dev, void *data) > dev_name(gtype->dev), > iommu_domain_type_str(gtype->type)); > gtype->type = 0; > + return 1; /* end the outer loop */ > } > > if (!gtype->dev) {