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hw/pci-host: Use object_initialize_child for correct reference counting

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Both functions, object_initialize() and object_property_add_child() increase
the reference counter of the new object, so one of the references has to be
dropped afterwards to get the reference counting right. Otherwise the child
object might not be properly cleaned up when the parent gets destroyed.
Some functions of the pci-host devices miss to drop one of the references.
Fix it by using object_initialize_child() instead, which takes care of
calling object_initialize(), object_property_add_child() and object_unref()
in the right order.

Suggested-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20190430191552.4027-1-thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Thomas Huth 2019-04-30 21:15:52 +02:00
parent 25ed0ecc09
commit aff39be0ed
4 changed files with 9 additions and 8 deletions
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4
hw/pci-host/designware.c
View file

@ -721,8 +721,8 @@ static void designware_pcie_host_init(Object *obj)
DesignwarePCIEHost *s = DESIGNWARE_PCIE_HOST(obj);
DesignwarePCIERoot *root = &s->root;
object_initialize(root, sizeof(*root), TYPE_DESIGNWARE_PCIE_ROOT);
object_property_add_child(obj, "root", OBJECT(root), NULL);
object_initialize_child(obj, "root", root, sizeof(*root),
TYPE_DESIGNWARE_PCIE_ROOT, &error_abort, NULL);
qdev_prop_set_int32(DEVICE(root), "addr", PCI_DEVFN(0, 0));
qdev_prop_set_bit(DEVICE(root), "multifunction", false);
}

5
hw/pci-host/gpex.c
View file

@ -29,6 +29,7 @@
* http://www.firmware.org/1275/practice/imap/imap0_9d.pdf
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "hw/pci-host/gpex.h"
@ -120,8 +121,8 @@ static void gpex_host_initfn(Object *obj)
GPEXHost *s = GPEX_HOST(obj);
GPEXRootState *root = &s->gpex_root;
object_initialize(root, sizeof(*root), TYPE_GPEX_ROOT_DEVICE);
object_property_add_child(obj, "gpex_root", OBJECT(root), NULL);
object_initialize_child(obj, "gpex_root", root, sizeof(*root),
TYPE_GPEX_ROOT_DEVICE, &error_abort, NULL);
qdev_prop_set_int32(DEVICE(root), "addr", PCI_DEVFN(0, 0));
qdev_prop_set_bit(DEVICE(root), "multifunction", false);
}

4
hw/pci-host/q35.c
View file

@ -216,8 +216,8 @@ static void q35_host_initfn(Object *obj)
memory_region_init_io(&phb->data_mem, obj, &pci_host_data_le_ops, phb,
"pci-conf-data", 4);
object_initialize(&s->mch, sizeof(s->mch), TYPE_MCH_PCI_DEVICE);
object_property_add_child(OBJECT(s), "mch", OBJECT(&s->mch), NULL);
object_initialize_child(OBJECT(s), "mch", &s->mch, sizeof(s->mch),
TYPE_MCH_PCI_DEVICE, &error_abort, NULL);
qdev_prop_set_int32(DEVICE(&s->mch), "addr", PCI_DEVFN(0, 0));
qdev_prop_set_bit(DEVICE(&s->mch), "multifunction", false);
/* mch's object_initialize resets the default value, set it again */

4
hw/pci-host/xilinx-pcie.c
View file

@ -149,8 +149,8 @@ static void xilinx_pcie_host_init(Object *obj)
XilinxPCIEHost *s = XILINX_PCIE_HOST(obj);
XilinxPCIERoot *root = &s->root;
object_initialize(root, sizeof(*root), TYPE_XILINX_PCIE_ROOT);
object_property_add_child(obj, "root", OBJECT(root), NULL);
object_initialize_child(obj, "root", root, sizeof(*root),
TYPE_XILINX_PCIE_ROOT, &error_abort, NULL);
qdev_prop_set_int32(DEVICE(root), "addr", PCI_DEVFN(0, 0));
qdev_prop_set_bit(DEVICE(root), "multifunction", false);
}