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Wed, 17 Jun 2020 13:22:19 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org Subject: [PATCH v2 3/7] block/nvme: don't access CQE after moving cq.head Date: Wed, 17 Jun 2020 14:21:57 +0100 Message-Id: <20200617132201.1832152-4-stefanha@redhat.com> In-Reply-To: <20200617132201.1832152-1-stefanha@redhat.com> References: <20200617132201.1832152-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Received-SPF: pass client-ip=205.139.110.61; envelope-from=stefanha@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/17 02:02:46 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Fam Zheng , Sergio Lopez , qemu-block@nongnu.org, Max Reitz , Stefan Hajnoczi , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" RG8gbm90IGFjY2VzcyBhIENRRSBhZnRlciBpbmNyZW1lbnRpbmcgcS0+Y3EuaGVhZCBhbmQgcmVs ZWFzaW5nIHEtPmxvY2suCkl0IGlzIHVubGlrZWx5IHRoYXQgdGhpcyBjYXVzZXMgcHJvYmxlbXMg aW4gcHJhY3RpY2UgYnV0IGl0J3MgYSBsYXRlbnQKYnVnLgoKVGhlIHJlYXNvbiB3aHkgaXQgc2hv dWxkIGJlIHNhZmUgYXQgdGhlIG1vbWVudCBpcyB0aGF0IGNvbXBsZXRpb24KcHJvY2Vzc2luZyBp cyBub3QgcmUtZW50cmFudCBhbmQgdGhlIENRIGRvb3JiZWxsIGlzbid0IHdyaXR0ZW4gdW50aWwg dGhlCmVuZCBvZiBudm1lX3Byb2Nlc3NfY29tcGxldGlvbigpLgoKTWFrZSB0aGlzIGNoYW5nZSBu b3cgYmVjYXVzZSBRRU1VIGV4cGVjdHMgY29tcGxldGlvbiBwcm9jZXNzaW5nIHRvIGJlCnJlLWVu dHJhbnQgYW5kIGxhdGVyIHBhdGNoZXMgd2lsbCBkbyB0aGF0LgoKU2lnbmVkLW9mZi1ieTogU3Rl ZmFuIEhham5vY3ppIDxzdGVmYW5oYUByZWRoYXQuY29tPgpSZXZpZXdlZC1ieTogU2VyZ2lvIExv cGV6IDxzbHBAcmVkaGF0LmNvbT4KUmV2aWV3ZWQtYnk6IFBoaWxpcHBlIE1hdGhpZXUtRGF1ZMOp IDxwaGlsbWRAcmVkaGF0LmNvbT4KLS0tCiBibG9jay9udm1lLmMgfCA1ICsrKystCiAxIGZpbGUg Y2hhbmdlZCwgNCBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCgpkaWZmIC0tZ2l0IGEvYmxv Y2svbnZtZS5jIGIvYmxvY2svbnZtZS5jCmluZGV4IGQ1NjdlY2UzZjQuLjM0NDg5MzgxMWEgMTAw NjQ0Ci0tLSBhL2Jsb2NrL252bWUuYworKysgYi9ibG9jay9udm1lLmMKQEAgLTMyMSwxMSArMzIx LDE0IEBAIHN0YXRpYyBib29sIG52bWVfcHJvY2Vzc19jb21wbGV0aW9uKEJEUlZOVk1lU3RhdGUg KnMsIE5WTWVRdWV1ZVBhaXIgKnEpCiAgICAgcS0+YnVzeSA9IHRydWU7CiAgICAgYXNzZXJ0KHEt PmluZmxpZ2h0ID49IDApOwogICAgIHdoaWxlIChxLT5pbmZsaWdodCkgeworICAgICAgICBpbnQg cmV0OwogICAgICAgICBpbnQxNl90IGNpZDsKKwogICAgICAgICBjID0gKE52bWVDcWUgKikmcS0+ Y3EucXVldWVbcS0+Y3EuaGVhZCAqIE5WTUVfQ1FfRU5UUllfQllURVNdOwogICAgICAgICBpZiAo KGxlMTZfdG9fY3B1KGMtPnN0YXR1cykgJiAweDEpID09IHEtPmNxX3BoYXNlKSB7CiAgICAgICAg ICAgICBicmVhazsKICAgICAgICAgfQorICAgICAgICByZXQgPSBudm1lX3RyYW5zbGF0ZV9lcnJv cihjKTsKICAgICAgICAgcS0+Y3EuaGVhZCA9IChxLT5jcS5oZWFkICsgMSkgJSBOVk1FX1FVRVVF X1NJWkU7CiAgICAgICAgIGlmICghcS0+Y3EuaGVhZCkgewogICAgICAgICAgICAgcS0+Y3FfcGhh c2UgPSAhcS0+Y3FfcGhhc2U7CkBAIC0zNDQsNyArMzQ3LDcgQEAgc3RhdGljIGJvb2wgbnZtZV9w cm9jZXNzX2NvbXBsZXRpb24oQkRSVk5WTWVTdGF0ZSAqcywgTlZNZVF1ZXVlUGFpciAqcSkKICAg ICAgICAgcHJlcS0+YnVzeSA9IGZhbHNlOwogICAgICAgICBwcmVxLT5jYiA9IHByZXEtPm9wYXF1 ZSA9IE5VTEw7CiAgICAgICAgIHFlbXVfbXV0ZXhfdW5sb2NrKCZxLT5sb2NrKTsKLSAgICAgICAg cmVxLmNiKHJlcS5vcGFxdWUsIG52bWVfdHJhbnNsYXRlX2Vycm9yKGMpKTsKKyAgICAgICAgcmVx LmNiKHJlcS5vcGFxdWUsIHJldCk7CiAgICAgICAgIHFlbXVfbXV0ZXhfbG9jaygmcS0+bG9jayk7 CiAgICAgICAgIHEtPmluZmxpZ2h0LS07CiAgICAgICAgIHByb2dyZXNzID0gdHJ1ZTsKLS0gCjIu MjYuMgoK