From 69520261204b9a1769134ed24b92cc0fa8445951 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Thu, 16 Sep 2021 13:17:07 +0200 Subject: [PATCH] monitor: Tidy up find_device_state() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit 6287d827d4 "monitor: allow device_del to accept QOM paths" extended find_device_state() to accept QOM paths in addition to qdev IDs. This added a checked conversion to TYPE_DEVICE at the end, which duplicates the check done for the qdev ID case earlier, except it sets a *different* error: GenericError "ID is not a hotpluggable device" when passed a QOM path, and DeviceNotFound "Device 'ID' not found" when passed a qdev ID. Fortunately, the latter won't happen as long as we add only devices to /machine/peripheral/. Earlier, commit b6cc36abb2 "qdev: device_del: Search for to be unplugged device in 'peripheral' container" rewrote the lookup by qdev ID to use QOM instead of qdev_find_recursive(), so it can handle buss-less devices. It does so by constructing an absolute QOM path. Works, but object_resolve_path_component() is easier. Switching to it also gets rid of the unclean duplication described above. While there, avoid converting to TYPE_DEVICE twice, first to check whether it's possible, and then for real. Signed-off-by: Markus Armbruster Reviewed-by: Damien Hedde Reviewed-by: Daniel P. Berrangé Message-Id: <20210916111707.84999-1-armbru@redhat.com> Signed-off-by: Paolo Bonzini --- softmmu/qdev-monitor.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/softmmu/qdev-monitor.c b/softmmu/qdev-monitor.c index 0705f00846..3df99ce9fc 100644 --- a/softmmu/qdev-monitor.c +++ b/softmmu/qdev-monitor.c @@ -836,16 +836,12 @@ void qmp_device_add(QDict *qdict, QObject **ret_data, Error **errp) static DeviceState *find_device_state(const char *id, Error **errp) { Object *obj; + DeviceState *dev; if (id[0] == '/') { obj = object_resolve_path(id, NULL); } else { - char *root_path = object_get_canonical_path(qdev_get_peripheral()); - char *path = g_strdup_printf("%s/%s", root_path, id); - - g_free(root_path); - obj = object_resolve_path_type(path, TYPE_DEVICE, NULL); - g_free(path); + obj = object_resolve_path_component(qdev_get_peripheral(), id); } if (!obj) { @@ -854,12 +850,13 @@ static DeviceState *find_device_state(const char *id, Error **errp) return NULL; } - if (!object_dynamic_cast(obj, TYPE_DEVICE)) { + dev = (DeviceState *)object_dynamic_cast(obj, TYPE_DEVICE); + if (!dev) { error_setg(errp, "%s is not a hotpluggable device", id); return NULL; } - return DEVICE(obj); + return dev; } void qdev_unplug(DeviceState *dev, Error **errp)