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GET /api/1.1/patches/2229069/?format=api
{ "id": 2229069, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2229069/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260427162700.89750-1-jag.raman@oracle.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/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": "" }, "msgid": "<20260427162700.89750-1-jag.raman@oracle.com>", "date": "2026-04-27T16:26:59", "name": "qdev: test if DeviceListener is in use", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "c417c3091bcb2e0c82fee8d2fff79751daeb9d28", "submitter": { "id": 71309, "url": "http://patchwork.ozlabs.org/api/1.1/people/71309/?format=api", "name": "Jagannathan Raman", "email": "jag.raman@oracle.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260427162700.89750-1-jag.raman@oracle.com/mbox/", "series": [ { "id": 501697, "url": "http://patchwork.ozlabs.org/api/1.1/series/501697/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501697", "date": "2026-04-27T16:26:59", "name": "qdev: test if DeviceListener is in use", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501697/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2229069/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2229069/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oracle.com header.i=@oracle.com header.a=rsa-sha256\n header.s=corp-2025-04-25 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b=uXJi4RNfkA/Vstk0S7KU+KoK7Gb9Xy4/9BW+d6PPU9kGYTjS9D4po5LnpPi+US8jBxHT2HKaUlPmVA08gvBeNtvVgIWbeu2H2GXfJzLuu9LD/AqVBiCpx6GFHLA7CqvxTFJ9wChKjZJb7giX8fYtGsulxcURM/Kpz6XOtVdJfmdn3ykGGVGRGt/89ckpG42Jao+q3TMSNj9ZskqarW2wQDeSy8V8ZQh6I5NKD6OTa14Oql4GaK9j8QRHEp5DtF7ndtSiFIeV7GjUO5Q99/g9R4WQobeBRKtI/srd6ZmYbl6NDjZAwfSq3WNDyL4TYbc7meMQZPz+Av0P04kjLKreZQ==", "ARC-Authentication-Results": "i=1; mx.microsoft.com 1; spf=pass\n smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com;\n dkim=pass header.d=oracle.com; arc=none", "From": "Jagannathan Raman <jag.raman@oracle.com>", "To": "qemu-devel@nongnu.org", "Cc": "armbru@redhat.com, Jagannathan Raman <jag.raman@oracle.com>,\n Paolo Bonzini <pbonzini@redhat.com>,\n =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= <berrange@redhat.com>,\n Elena Ufimtseva <elena.ufimtseva@oracle.com>", "Subject": "[PATCH] qdev: test if DeviceListener is in use", "Date": "Mon, 27 Apr 2026 12:26:59 -0400", "Message-ID": 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DJ9X4oPSnL4V9OmDmWQvHJrP+l49kcjAhCC7RzhlI08wQFYwj4Ri0h+hXOqFvdNXt5QLBguhlR7\n KYuMmPtYwhC2kjNmDgw==", "Received-SPF": "pass client-ip=205.220.165.32;\n envelope-from=jag.raman@oracle.com;\n helo=mx0a-00069f02.pphosted.com", "X-Spam_score_int": "-27", "X-Spam_score": "-2.8", "X-Spam_bar": "--", "X-Spam_report": "(-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001,\n SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no", "X-Spam_action": "no action", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.29", "Precedence": "list", "List-Id": "qemu development <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>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Adds a function to test if a given DeviceListener object is in use. This\nis necessary to confirm we're not unregistering an object that is not in\nuse, which results in a crash.\n\nFixes a crash when we execute \"qom-list-properties\" QMP command on the\n\"x-remote-object\":\nhttps://www.mail-archive.com/qemu-devel@nongnu.org/msg1185472.html\n\nSigned-off-by: Jagannathan Raman <jag.raman@oracle.com>\n---\n hw/core/qdev.c | 5 +++++\n hw/remote/remote-obj.c | 4 +++-\n include/hw/core/qdev.h | 1 +\n 3 files changed, 9 insertions(+), 1 deletion(-)", "diff": "diff --git a/hw/core/qdev.c b/hw/core/qdev.c\nindex e48616b2c6..97b09f6e7f 100644\n--- a/hw/core/qdev.c\n+++ b/hw/core/qdev.c\n@@ -208,6 +208,11 @@ void device_listener_unregister(DeviceListener *listener)\n QTAILQ_REMOVE(&device_listeners, listener, link);\n }\n \n+bool device_listener_is_registered(DeviceListener *listener)\n+{\n+\treturn QTAILQ_IN_USE(listener, link);\n+}\n+\n bool qdev_should_hide_device(const QDict *opts, bool from_json, Error **errp)\n {\n ERRP_GUARD();\ndiff --git a/hw/remote/remote-obj.c b/hw/remote/remote-obj.c\nindex 86192dc8da..122e30af7e 100644\n--- a/hw/remote/remote-obj.c\n+++ b/hw/remote/remote-obj.c\n@@ -154,7 +154,9 @@ static void remote_object_finalize(Object *obj)\n RemoteObjectClass *k = REMOTE_OBJECT_GET_CLASS(obj);\n RemoteObject *o = REMOTE_OBJECT(obj);\n \n- device_listener_unregister(&o->listener);\n+ if (device_listener_is_registered(&o->listener)) {\n+ device_listener_unregister(&o->listener);\n+ }\n \n if (o->ioc) {\n qio_channel_shutdown(o->ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL);\ndiff --git a/include/hw/core/qdev.h b/include/hw/core/qdev.h\nindex f99a8979cc..150113584e 100644\n--- a/include/hw/core/qdev.h\n+++ b/include/hw/core/qdev.h\n@@ -1146,6 +1146,7 @@ static inline void qbus_mark_full(BusState *bus)\n \n void device_listener_register(DeviceListener *listener);\n void device_listener_unregister(DeviceListener *listener);\n+bool device_listener_is_registered(DeviceListener *listener);\n \n /**\n * qdev_should_hide_device() - check if device should be hidden\n", "prefixes": [] }