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virtio-bus: remove vdev field

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The vdev field is complicated to synchronize.  Just access the
BusState's list of children.

Cc: qemu-stable@nongnu.org
Acked-by: Andreas Faerber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-09-20 13:31:39 +02:00
parent 0b81c1ef5c
commit 06d3dff072
4 changed files with 57 additions and 35 deletions
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16
include/hw/virtio/virtio-bus.h
View file

@ -72,10 +72,6 @@ typedef struct VirtioBusClass {
struct VirtioBusState {
BusState parent_obj;
/*
* Only one VirtIODevice can be plugged on the bus.
*/
VirtIODevice *vdev;
};
int virtio_bus_plug_device(VirtIODevice *vdev);
@ -98,4 +94,16 @@ void virtio_bus_get_vdev_config(VirtioBusState *bus, uint8_t *config);
/* Set config of the plugged device. */
void virtio_bus_set_vdev_config(VirtioBusState *bus, uint8_t *config);
static inline VirtIODevice *virtio_bus_get_device(VirtioBusState *bus)
{
BusState *qbus = &bus->parent_obj;
BusChild *kid = QTAILQ_FIRST(&qbus->children);
DeviceState *qdev = kid ? kid->child : NULL;
/* This is used on the data path, the cast is guaranteed
* to succeed by the qdev machinery.
*/
return (VirtIODevice *)qdev;
}
#endif /* VIRTIO_BUS_H */