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 X-Spam-Level: X-Spam-Status: No, score=-15.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B9ADC2D0E4 for ; Wed, 25 Nov 2020 01:54:49 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 752B82145D for ; Wed, 25 Nov 2020 01:54:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 752B82145D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; 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Wed, 25 Nov 2020 01:54:45 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HsbeaMNp4tCV for ; Wed, 25 Nov 2020 01:54:43 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) by whitealder.osuosl.org (Postfix) with ESMTPS id 86AA486A37 for ; Wed, 25 Nov 2020 01:54:43 +0000 (UTC) Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4CgkTL0NZBzkfXG; Wed, 25 Nov 2020 09:54:14 +0800 (CST) Received: from [10.174.178.174] (10.174.178.174) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.487.0; Wed, 25 Nov 2020 09:54:35 +0800 Subject: Re: [PATCH] iommu: fix return error code in iommu_probe_device() To: Will Deacon References: <20201117025238.3425422-1-yangyingliang@huawei.com> <835ab066-b6b8-a211-4941-c01781031de8@linux.intel.com> <454f5e3e-c380-e8a5-9283-3f7578eb601e@huawei.com> <20201117224102.GD524@willie-the-truck> From: Yang Yingliang Message-ID: <78bee047-ab33-4d81-6f77-af4c5b6e8aaa@huawei.com> Date: Wed, 25 Nov 2020 09:54:34 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20201117224102.GD524@willie-the-truck> Content-Language: en-US X-Originating-IP: [10.174.178.174] X-CFilter-Loop: Reflected Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Ck9uIDIwMjAvMTEvMTggNjo0MSwgV2lsbCBEZWFjb24gd3JvdGU6Cj4gT24gVHVlLCBOb3YgMTcs IDIwMjAgYXQgMDc6MTE6MjhQTSArMDgwMCwgWWFuZyBZaW5nbGlhbmcgd3JvdGU6Cj4+IE9uIDIw MjAvMTEvMTcgMTc6NDAsIEx1IEJhb2x1IHdyb3RlOgo+Pj4gT24gMjAyMC8xMS8xNyAxMDo1Miwg WWFuZyBZaW5nbGlhbmcgd3JvdGU6Cj4+Pj4gSWYgaW9tbXVfZ3JvdXBfZ2V0KCkgZmFpbGVkLCBp dCBuZWVkIHJldHVybiBlcnJvciBjb2RlCj4+Pj4gaW4gaW9tbXVfcHJvYmVfZGV2aWNlKCkuCj4+ Pj4KPj4+PiBGaXhlczogY2YxOTM4ODhiZmJkICgiaW9tbXU6IE1vdmUgbmV3IHByb2JlX2Rldmlj ZSBwYXRoLi4uIikKPj4+PiBSZXBvcnRlZC1ieTogSHVsayBSb2JvdCA8aHVsa2NpQGh1YXdlaS5j b20+Cj4+Pj4gU2lnbmVkLW9mZi1ieTogWWFuZyBZaW5nbGlhbmcgPHlhbmd5aW5nbGlhbmdAaHVh d2VpLmNvbT4KPj4+PiAtLS0KPj4+PiAgwqAgZHJpdmVycy9pb21tdS9pb21tdS5jIHwgNCArKyst Cj4+Pj4gIMKgIDEgZmlsZSBjaGFuZ2VkLCAzIGluc2VydGlvbnMoKyksIDEgZGVsZXRpb24oLSkK Pj4+Pgo+Pj4+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2lvbW11L2lvbW11LmMgYi9kcml2ZXJzL2lv bW11L2lvbW11LmMKPj4+PiBpbmRleCBiNTM0NDZiYjhjNmIuLjZmNGEzMmRmOTBmNiAxMDA2NDQK Pj4+PiAtLS0gYS9kcml2ZXJzL2lvbW11L2lvbW11LmMKPj4+PiArKysgYi9kcml2ZXJzL2lvbW11 L2lvbW11LmMKPj4+PiBAQCAtMjUzLDggKzI1MywxMCBAQCBpbnQgaW9tbXVfcHJvYmVfZGV2aWNl KHN0cnVjdCBkZXZpY2UgKmRldikKPj4+PiAgwqDCoMKgwqDCoMKgwqDCoMKgIGdvdG8gZXJyX291 dDsKPj4+PiAgwqAgwqDCoMKgwqDCoCBncm91cCA9IGlvbW11X2dyb3VwX2dldChkZXYpOwo+Pj4+ IC3CoMKgwqAgaWYgKCFncm91cCkKPj4+PiArwqDCoMKgIGlmICghZ3JvdXApIHsKPj4+PiArwqDC oMKgwqDCoMKgwqAgcmV0ID0gLUVOT0RFVjsKPj4+IENhbiB5b3UgcGxlYXNlIGV4cGxhaW4gd2h5 IHlvdSB1c2UgLUVOT0RFViBoZXJlPwo+PiBCZWZvcmUgNzk2NTkxOTBlZTk3ICgiaW9tbXU6IERv bid0IHRha2UgZ3JvdXAgcmVmZXJlbmNlIGluCj4+IGlvbW11X2FsbG9jX2RlZmF1bHRfZG9tYWlu KCkiKSwgaW4KPj4KPj4gaW9tbXVfYWxsb2NfZGVmYXVsdF9kb21haW4oKSwgaWYgZ3JvdXAgaXMg TlVMTCwgaXQgd2lsbCByZXR1cm4gLUVOT0RFVi4KPiBIbW0uIFdoaWxlIEkgdGhpbmsgdGhlIHBh dGNoIGlzIG9rLCBJJ20gbm90IHN1cmUgaXQgcXVhbGlmaWVzIGFzIGEgZml4Lgo+IEhhcyBpb21t dV9wcm9iZV9kZXZpY2UoKSBldmVyIHByb3BhZ2F0ZWQgdGhpcyBlcnJvcj8gVGhlIGNvbW1pdCB5 b3UKPiBpZGVudGlmeSBpbiB0aGUgJ0ZpeGVzOicgdGFnIGRvZXNuJ3Qgc2VlbSB0byBjaGFuZ2Ug dGhpcyBhZmFpY3QuCgpJIHRoaW5rIGFmdGVyIHRoaXMgY29tbWl0IDQzOTk0NWU3NGE0YiAoImlv bW11OiBNb3ZlIGRlZmF1bHQgZG9tYWluIAphbGxvY2F0aW9uIHRvIGlvbW11X3Byb2JlX2Rldmlj ZSgpIiksCgppb21tdV9wcm9iZV9kZXZpY2UoKSB3b24ndCByZXR1cm4gZXJyb3IgY29kZSBpZiBn cm91cCBpcyBOVUxMLiBJIGNhbiBhZGQgCnRoaXMgZml4IHRhZyBpbiB2Mi4KCgo+Cj4gV2lsbAo+ IC4KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KaW9tbXUg bWFpbGluZyBsaXN0CmlvbW11QGxpc3RzLmxpbnV4LWZvdW5kYXRpb24ub3JnCmh0dHBzOi8vbGlz dHMubGludXhmb3VuZGF0aW9uLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2lvbW11