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Tue, 03 Aug 2021 01:09:36 -0700 (PDT) X-Google-Smtp-Source: ABdhPJx7eB41SimgYU81rcElaZj+nONhqTjmXUgDQCX8JCwgqwPPspHzUgCCQ+CXUVfMnpfJwz3SQw== X-Received: by 2002:aa7:8e51:0:b029:332:920f:1430 with SMTP id d17-20020aa78e510000b0290332920f1430mr21300550pfr.1.1627978176387; Tue, 03 Aug 2021 01:09:36 -0700 (PDT) Received: from wangxiaodeMacBook-Air.local ([209.132.188.80]) by smtp.gmail.com with ESMTPSA id j10sm15534492pfd.200.2021.08.03.01.09.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 03 Aug 2021 01:09:35 -0700 (PDT) Subject: Re: [PATCH v10 10/17] virtio: Handle device reset failure in register_virtio_device() To: Xie Yongji , mst@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, hch@infradead.org, christian.brauner@canonical.com, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net, mika.penttila@nextfour.com, dan.carpenter@oracle.com, joro@8bytes.org, gregkh@linuxfoundation.org, zhe.he@windriver.com, xiaodong.liu@intel.com, joe@perches.com References: <20210729073503.187-1-xieyongji@bytedance.com> <20210729073503.187-11-xieyongji@bytedance.com> From: Jason Wang Message-ID: <6bb6c689-e6dd-cfa2-094b-a0ca4258aded@redhat.com> Date: Tue, 3 Aug 2021 16:09:23 +0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <20210729073503.187-11-xieyongji@bytedance.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Cc: kvm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, iommu@lists.linux-foundation.org, songmuchun@bytedance.com, linux-fsdevel@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="gbk"; Format="flowed" Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" CtTaIDIwMjEvNy8yOSDPws7nMzozNCwgWGllIFlvbmdqaSDQtLXAOgo+IFRoZSBkZXZpY2UgcmVz ZXQgbWF5IGZhaWwgaW4gdmlydGlvLXZkcGEgY2FzZSBub3csIHNvIGFkZCBjaGVja3MgdG8KPiBp dHMgcmV0dXJuIHZhbHVlIGFuZCBmYWlsIHRoZSByZWdpc3Rlcl92aXJ0aW9fZGV2aWNlKCkuCgoK U28gdGhlIHJlc2V0KCkgd291bGQgYmUgY2FsbGVkIGJ5IHRoZSBkcml2ZXIgZHVyaW5nIHJlbW92 ZSBhcyB3ZWxsLCBvciAKaXMgaXQgc3VmZmljaWVudCB0byBkZWFsIG9ubHkgd2l0aCB0aGUgcmVz ZXQgZHVyaW5nIHByb2JlPwoKVGhhbmtzCgoKPgo+IFNpZ25lZC1vZmYtYnk6IFhpZSBZb25namkg PHhpZXlvbmdqaUBieXRlZGFuY2UuY29tPgo+IC0tLQo+ICAgZHJpdmVycy92aXJ0aW8vdmlydGlv LmMgfCAxNSArKysrKysrKysrLS0tLS0KPiAgIDEgZmlsZSBjaGFuZ2VkLCAxMCBpbnNlcnRpb25z KCspLCA1IGRlbGV0aW9ucygtKQo+Cj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvdmlydGlvL3ZpcnRp by5jIGIvZHJpdmVycy92aXJ0aW8vdmlydGlvLmMKPiBpbmRleCBhMTViZWI2YjU5M2IuLjhkZjc1 NDI1ZmI0MyAxMDA2NDQKPiAtLS0gYS9kcml2ZXJzL3ZpcnRpby92aXJ0aW8uYwo+ICsrKyBiL2Ry aXZlcnMvdmlydGlvL3ZpcnRpby5jCj4gQEAgLTM0OSw3ICszNDksOSBAQCBpbnQgcmVnaXN0ZXJf dmlydGlvX2RldmljZShzdHJ1Y3QgdmlydGlvX2RldmljZSAqZGV2KQo+ICAgCj4gICAJLyogV2Ug YWx3YXlzIHN0YXJ0IGJ5IHJlc2V0dGluZyB0aGUgZGV2aWNlLCBpbiBjYXNlIGEgcHJldmlvdXMK PiAgIAkgKiBkcml2ZXIgbWVzc2VkIGl0IHVwLiAgVGhpcyBhbHNvIHRlc3RzIHRoYXQgY29kZSBw YXRoIGEgbGl0dGxlLiAqLwo+IC0JZGV2LT5jb25maWctPnJlc2V0KGRldik7Cj4gKwllcnIgPSBk ZXYtPmNvbmZpZy0+cmVzZXQoZGV2KTsKPiArCWlmIChlcnIpCj4gKwkJZ290byBlcnJfcmVzZXQ7 Cj4gICAKPiAgIAkvKiBBY2tub3dsZWRnZSB0aGF0IHdlJ3ZlIHNlZW4gdGhlIGRldmljZS4gKi8K PiAgIAl2aXJ0aW9fYWRkX3N0YXR1cyhkZXYsIFZJUlRJT19DT05GSUdfU19BQ0tOT1dMRURHRSk7 Cj4gQEAgLTM2MiwxMCArMzY0LDEzIEBAIGludCByZWdpc3Rlcl92aXJ0aW9fZGV2aWNlKHN0cnVj dCB2aXJ0aW9fZGV2aWNlICpkZXYpCj4gICAJICovCj4gICAJZXJyID0gZGV2aWNlX2FkZCgmZGV2 LT5kZXYpOwo+ICAgCWlmIChlcnIpCj4gLQkJaWRhX3NpbXBsZV9yZW1vdmUoJnZpcnRpb19pbmRl eF9pZGEsIGRldi0+aW5kZXgpOwo+IC1vdXQ6Cj4gLQlpZiAoZXJyKQo+IC0JCXZpcnRpb19hZGRf c3RhdHVzKGRldiwgVklSVElPX0NPTkZJR19TX0ZBSUxFRCk7Cj4gKwkJZ290byBlcnJfYWRkOwo+ ICsKPiArCXJldHVybiAwOwo+ICtlcnJfYWRkOgo+ICsJdmlydGlvX2FkZF9zdGF0dXMoZGV2LCBW SVJUSU9fQ09ORklHX1NfRkFJTEVEKTsKPiArZXJyX3Jlc2V0Ogo+ICsJaWRhX3NpbXBsZV9yZW1v dmUoJnZpcnRpb19pbmRleF9pZGEsIGRldi0+aW5kZXgpOwo+ICAgCXJldHVybiBlcnI7Cj4gICB9 Cj4gICBFWFBPUlRfU1lNQk9MX0dQTChyZWdpc3Rlcl92aXJ0aW9fZGV2aWNlKTsKCl9fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlz dAppb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91 bmRhdGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==