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virtio-rng: Keep the default backend out of VirtIORNGConf 

The default backend is only used within virtio_rng_device_realize().
Replace VirtIORNGConf member default_backend by a local variable.
Adjust its type to reduce conversions.

While there, pass &error_abort instead of NULL when failure would be a
programming error.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20190820160615.14616-3-lvivier@redhat.com>
This commit is contained in:
Markus Armbruster 2019-08-20 18:06:14 +02:00 committed by Michael S. Tsirkin
parent 6c4e9d487f
commit 5f7655f6ef
2 changed files with 9 additions and 13 deletions
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20
hw/virtio/virtio-rng.c
View File

@ -19,6 +19,7 @@
#include "hw/virtio/virtio-rng.h"
#include "sysemu/rng.h"
#include "sysemu/runstate.h"
#include "sysemu/rng-random.h"
#include "qom/object_interfaces.h"
#include "trace.h"
@ -192,27 +193,24 @@ static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
}
if (vrng->conf.rng == NULL) {
vrng->conf.default_backend = RNG_RANDOM(object_new(TYPE_RNG_RANDOM));
Object *default_backend = object_new(TYPE_RNG_RANDOM);
user_creatable_complete(USER_CREATABLE(vrng->conf.default_backend),
user_creatable_complete(USER_CREATABLE(default_backend),
&local_err);
if (local_err) {
error_propagate(errp, local_err);
object_unref(OBJECT(vrng->conf.default_backend));
object_unref(default_backend);
return;
}
object_property_add_child(OBJECT(dev),
"default-backend",
OBJECT(vrng->conf.default_backend),
NULL);
object_property_add_child(OBJECT(dev), "default-backend",
default_backend, &error_abort);
/* The child property took a reference, we can safely drop ours now */
object_unref(OBJECT(vrng->conf.default_backend));
object_unref(default_backend);
object_property_set_link(OBJECT(dev),
OBJECT(vrng->conf.default_backend),
"rng", NULL);
object_property_set_link(OBJECT(dev), default_backend,
"rng", &error_abort);
}
vrng->rng = vrng->conf.rng;

2
include/hw/virtio/virtio-rng.h
View File

@ -14,7 +14,6 @@
#include "hw/virtio/virtio.h"
#include "sysemu/rng.h"
#include "sysemu/rng-random.h"
#include "standard-headers/linux/virtio_rng.h"
#define TYPE_VIRTIO_RNG "virtio-rng-device"
@ -27,7 +26,6 @@ struct VirtIORNGConf {
RngBackend *rng;
uint64_t max_bytes;
uint32_t period_ms;
RngRandom *default_backend;
};
typedef struct VirtIORNG {