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ivshmem: fix ivshmem-{plain,doorbell} crash without arg 

"qemu -device ivshmem-{plain,doorbell}" will crash, because the device
doesn't check that the required argument is provided. (screwed up in
commit 5400c02)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
This commit is contained in:
Marc-André Lureau 2016-04-12 15:33:10 +02:00
parent d44122ecd0
commit 6dc64780c2
1 changed files with 30 additions and 0 deletions
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30
hw/misc/ivshmem.c
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@ -872,6 +872,8 @@ static void ivshmem_common_realize(PCIDevice *dev, Error **errp)
s->ivshmem_bar2 = host_memory_backend_get_memory(s->hostmem, s->ivshmem_bar2 = host_memory_backend_get_memory(s->hostmem,
&error_abort); &error_abort);
} else { } else {
assert(s->server_chr);
IVSHMEM_DPRINTF("using shared memory server (socket = %s)\n", IVSHMEM_DPRINTF("using shared memory server (socket = %s)\n",
s->server_chr->filename); s->server_chr->filename);
@ -1051,10 +1053,24 @@ static void ivshmem_plain_init(Object *obj)
&error_abort); &error_abort);
} }
static void ivshmem_plain_realize(PCIDevice *dev, Error **errp)
{
IVShmemState *s = IVSHMEM_COMMON(dev);
if (!s->hostmem) {
error_setg(errp, "You must specify a 'memdev'");
return;
}
ivshmem_common_realize(dev, errp);
}
static void ivshmem_plain_class_init(ObjectClass *klass, void *data) static void ivshmem_plain_class_init(ObjectClass *klass, void *data)
{ {
DeviceClass *dc = DEVICE_CLASS(klass); DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->realize = ivshmem_plain_realize;
dc->props = ivshmem_plain_properties; dc->props = ivshmem_plain_properties;
dc->vmsd = &ivshmem_plain_vmsd; dc->vmsd = &ivshmem_plain_vmsd;
} }
@ -1099,10 +1115,24 @@ static void ivshmem_doorbell_init(Object *obj)
s->legacy_size = SIZE_MAX; /* whatever the server sends */ s->legacy_size = SIZE_MAX; /* whatever the server sends */
} }
static void ivshmem_doorbell_realize(PCIDevice *dev, Error **errp)
{
IVShmemState *s = IVSHMEM_COMMON(dev);
if (!s->server_chr) {
error_setg(errp, "You must specify a 'chardev'");
return;
}
ivshmem_common_realize(dev, errp);
}
static void ivshmem_doorbell_class_init(ObjectClass *klass, void *data) static void ivshmem_doorbell_class_init(ObjectClass *klass, void *data)
{ {
DeviceClass *dc = DEVICE_CLASS(klass); DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
k->realize = ivshmem_doorbell_realize;
dc->props = ivshmem_doorbell_properties; dc->props = ivshmem_doorbell_properties;
dc->vmsd = &ivshmem_doorbell_vmsd; dc->vmsd = &ivshmem_doorbell_vmsd;
} }