diff --git a/hw/core/bus.c b/hw/core/bus.c
index a9e4118d3c..50924793ac 100644
--- a/hw/core/bus.c
+++ b/hw/core/bus.c
@@ -25,7 +25,7 @@
 
 void qbus_set_hotplug_handler(BusState *bus, Object *handler, Error **errp)
 {
-    object_property_set_link(OBJECT(bus), OBJECT(handler),
+    object_property_set_link(OBJECT(bus), handler,
                              QDEV_HOTPLUG_HANDLER_PROPERTY, errp);
 }
 
diff --git a/hw/ide/ahci-allwinner.c b/hw/ide/ahci-allwinner.c
index bb8393d2b6..8536b9eb5a 100644
--- a/hw/ide/ahci-allwinner.c
+++ b/hw/ide/ahci-allwinner.c
@@ -90,7 +90,7 @@ static void allwinner_ahci_init(Object *obj)
     SysbusAHCIState *s = SYSBUS_AHCI(obj);
     AllwinnerAHCIState *a = ALLWINNER_AHCI(obj);
 
-    memory_region_init_io(&a->mmio, OBJECT(obj), &allwinner_ahci_mem_ops, a,
+    memory_region_init_io(&a->mmio, obj, &allwinner_ahci_mem_ops, a,
                           "allwinner-ahci", ALLWINNER_AHCI_MMIO_SIZE);
     memory_region_add_subregion(&s->ahci.mem, ALLWINNER_AHCI_MMIO_OFF,
                                 &a->mmio);
diff --git a/hw/ipmi/smbus_ipmi.c b/hw/ipmi/smbus_ipmi.c
index 2a9470d9df..f1a0148755 100644
--- a/hw/ipmi/smbus_ipmi.c
+++ b/hw/ipmi/smbus_ipmi.c
@@ -329,7 +329,7 @@ static void smbus_ipmi_init(Object *obj)
 {
     SMBusIPMIDevice *sid = SMBUS_IPMI(obj);
 
-    ipmi_bmc_find_and_link(OBJECT(obj), (Object **) &sid->bmc);
+    ipmi_bmc_find_and_link(obj, (Object **) &sid->bmc);
 }
 
 static void smbus_ipmi_get_fwinfo(struct IPMIInterface *ii, IPMIFwInfo *info)
diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
index 536571db7f..05a5614a04 100644
--- a/hw/microblaze/petalogix_ml605_mmu.c
+++ b/hw/microblaze/petalogix_ml605_mmu.c
@@ -148,9 +148,9 @@ petalogix_ml605_init(MachineState *machine)
     qdev_set_nic_properties(eth0, &nd_table[0]);
     qdev_prop_set_uint32(eth0, "rxmem", 0x1000);
     qdev_prop_set_uint32(eth0, "txmem", 0x1000);
-    object_property_set_link(OBJECT(eth0), OBJECT(ds),
+    object_property_set_link(OBJECT(eth0), ds,
                              "axistream-connected", &error_abort);
-    object_property_set_link(OBJECT(eth0), OBJECT(cs),
+    object_property_set_link(OBJECT(eth0), cs,
                              "axistream-control-connected", &error_abort);
     qdev_init_nofail(eth0);
     sysbus_mmio_map(SYS_BUS_DEVICE(eth0), 0, AXIENET_BASEADDR);
@@ -161,9 +161,9 @@ petalogix_ml605_init(MachineState *machine)
     cs = object_property_get_link(OBJECT(eth0),
                                   "axistream-control-connected-target", NULL);
     qdev_prop_set_uint32(dma, "freqhz", 100 * 1000000);
-    object_property_set_link(OBJECT(dma), OBJECT(ds),
+    object_property_set_link(OBJECT(dma), ds,
                              "axistream-connected", &error_abort);
-    object_property_set_link(OBJECT(dma), OBJECT(cs),
+    object_property_set_link(OBJECT(dma), cs,
                              "axistream-control-connected", &error_abort);
     qdev_init_nofail(dma);
     sysbus_mmio_map(SYS_BUS_DEVICE(dma), 0, AXIDMA_BASEADDR);
diff --git a/hw/s390x/sclp.c b/hw/s390x/sclp.c
index 43cc1e0a41..20aca30ac4 100644
--- a/hw/s390x/sclp.c
+++ b/hw/s390x/sclp.c
@@ -321,7 +321,7 @@ void s390_sclp_init(void)
     Object *new = object_new(TYPE_SCLP);
 
     object_property_add_child(qdev_get_machine(), TYPE_SCLP, new);
-    object_unref(OBJECT(new));
+    object_unref(new);
     qdev_init_nofail(DEVICE(new));
 }
 
diff --git a/monitor/misc.c b/monitor/misc.c
index 9723b466cd..f5207cd242 100644
--- a/monitor/misc.c
+++ b/monitor/misc.c
@@ -1837,8 +1837,7 @@ void object_add_completion(ReadLineState *rs, int nb_args, const char *str)
 static int qdev_add_hotpluggable_device(Object *obj, void *opaque)
 {
     GSList **list = opaque;
-    DeviceState *dev = (DeviceState *)object_dynamic_cast(OBJECT(obj),
-                                                          TYPE_DEVICE);
+    DeviceState *dev = (DeviceState *)object_dynamic_cast(obj, TYPE_DEVICE);
 
     if (dev == NULL) {
         return 0;
diff --git a/qom/object.c b/qom/object.c
index e89ffbe3d1..d0be42c8d6 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -756,7 +756,7 @@ Object *object_new_with_propv(const char *typename,
         }
     }
 
-    object_unref(OBJECT(obj));
+    object_unref(obj);
     return obj;
 
  error:
@@ -1650,7 +1650,7 @@ object_property_add_child(Object *obj, const char *name,
 
     assert(!child->parent);
 
-    type = g_strdup_printf("child<%s>", object_get_typename(OBJECT(child)));
+    type = g_strdup_printf("child<%s>", object_get_typename(child));
 
     op = object_property_add(obj, name, type, object_get_child_property, NULL,
                              object_finalize_child_property, child);