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/smc91c111.c b/hw/net/smc91c111.c
index d1dca8f4e2..74e06e6c77 100644
--- a/hw/net/smc91c111.c
+++ b/hw/net/smc91c111.c
@@ -736,19 +736,11 @@ static const MemoryRegionOps smc91c111_mem_ops = {
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
-static void smc91c111_cleanup(NetClientState *nc)
-{
-    smc91c111_state *s = qemu_get_nic_opaque(nc);
-
-    s->nic = NULL;
-}
-
 static NetClientInfo net_smc91c111_info = {
     .type = NET_CLIENT_OPTIONS_KIND_NIC,
     .size = sizeof(NICState),
     .can_receive = smc91c111_can_receive,
     .receive = smc91c111_receive,
-    .cleanup = smc91c111_cleanup,
 };
 
 static int smc91c111_init1(SysBusDevice *sbd)