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GET /api/patches/1317131/?format=api
{ "id": 1317131, "url": "http://patchwork.ozlabs.org/api/patches/1317131/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20200625184838.28172-5-philmd@redhat.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20200625184838.28172-5-philmd@redhat.com>", "list_archive_url": null, "date": "2020-06-25T18:48:25", "name": "[04/17] block/nvme: Be explicit we share NvmeIdCtrl / NvmeIdNs structures", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "209e98d2712d69fdbe922a13fa9e500053f2575e", "submitter": { "id": 74995, "url": "http://patchwork.ozlabs.org/api/people/74995/?format=api", "name": "Philippe Mathieu-Daudé", "email": "philmd@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20200625184838.28172-5-philmd@redhat.com/mbox/", "series": [ { "id": 185846, "url": "http://patchwork.ozlabs.org/api/series/185846/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=185846", "date": "2020-06-25T18:48:21", "name": "block/nvme: Various cleanups required to use multiple queues", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/185846/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/1317131/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/1317131/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@bilbo.ozlabs.org", "Authentication-Results": [ "ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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charset=UTF-8;\n\ttext/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=205.139.110.120; envelope-from=philmd@redhat.com;\n helo=us-smtp-1.mimecast.com", "X-detected-operating-system": "by eggs.gnu.org: First seen = 2020/06/25 00:45:15", "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,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01,\n 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": "<qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Cc": "Fam Zheng <fam@euphon.net>, Kevin Wolf <kwolf@redhat.com>,\n qemu-block@nongnu.org, Max Reitz <mreitz@redhat.com>,\n Maxim Levitsky <mlevitsk@redhat.com>,\n =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= <philmd@redhat.com>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "\"Qemu-devel\"\n <qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>" }, "content": "We allocate an unique chunk of memory then use it for two\ndifferent structures. Introduce the 'idsz_max' variable to\nhold the maximum size, to make it clearer the size is enough\nto hold the two structures.\n\nSigned-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>\n---\nFIXME: reword with something that makes more sense...\n---\n block/nvme.c | 6 ++++--\n 1 file changed, 4 insertions(+), 2 deletions(-)", "diff": "diff --git a/block/nvme.c b/block/nvme.c\nindex 71f8cf27a8..ffda804a8e 100644\n--- a/block/nvme.c\n+++ b/block/nvme.c\n@@ -438,6 +438,7 @@ static void nvme_identify(BlockDriverState *bs, int namespace, Error **errp)\n BDRVNVMeState *s = bs->opaque;\n NvmeIdCtrl *idctrl;\n NvmeIdNs *idns;\n+ size_t idsz_max;\n NvmeLBAF *lbaf;\n uint8_t *resp;\n uint16_t oncs;\n@@ -448,14 +449,15 @@ static void nvme_identify(BlockDriverState *bs, int namespace, Error **errp)\n .cdw10 = cpu_to_le32(0x1),\n };\n \n- resp = qemu_try_blockalign0(bs, sizeof(NvmeIdCtrl));\n+ idsz_max = MAX_CONST(sizeof(NvmeIdCtrl), sizeof(NvmeIdNs));\n+ resp = qemu_try_blockalign0(bs, idsz_max);\n if (!resp) {\n error_setg(errp, \"Cannot allocate buffer for identify response\");\n goto out;\n }\n idctrl = (NvmeIdCtrl *)resp;\n idns = (NvmeIdNs *)resp;\n- r = qemu_vfio_dma_map(s->vfio, resp, sizeof(NvmeIdCtrl), true, &iova);\n+ r = qemu_vfio_dma_map(s->vfio, resp, idsz_max, true, &iova);\n if (r) {\n error_setg(errp, \"Cannot map buffer for DMA\");\n goto out;\n", "prefixes": [ "04/17" ] }