net: remove all cleanup methods from NIC NetClientInfos

All NICs have a cleanup function that, in most cases, zeroes the pointer
to the NICState.  In some cases, it frees data belonging to the NIC.

However, this function is never called except when exiting from QEMU.
It is not necessary to NULL pointers and free data here; the right place
to do that would be in the device's unrealize function, after calling
qemu_del_nic.  Zeroing the NIC multiple times is also wrong for multiqueue
devices.

This cleanup function gets in the way of making the NetClientStates for
the NIC hold an object_ref reference to the object, so get rid of it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 0 insertions, 8 deletions

diff --git a/hw/net/xgmac.c b/hw/net/xgmac.c
index aeffcb5..b068f3a 100644
--- a/hw/net/xgmac.c
+++ b/hw/net/xgmac.c
@@ -368,19 +368,11 @@ out:
     return ret;
 }
 
-static void eth_cleanup(NetClientState *nc)
-{
-    XgmacState *s = qemu_get_nic_opaque(nc);
-
-    s->nic = NULL;
-}
-
 static NetClientInfo net_xgmac_enet_info = {
     .type = NET_CLIENT_OPTIONS_KIND_NIC,
     .size = sizeof(NICState),
     .can_receive = eth_can_rx,
     .receive = eth_rx,
-    .cleanup = eth_cleanup,
 };
 
 static int xgmac_enet_init(SysBusDevice *sbd)