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virtio-net: don't update mac_table in error state
mac_table was always cleaned up first in handling VIRTIO_NET_CTRL_MAC_TABLE_SET command, and we din't recover mac_table content in error state, it's not correct. This patch makes all the changes in temporal variables, only update the real mac_table if everything is ok. We won't change mac_table in error state, so rxfilter notification isn't needed. This patch also fixed same problame in http://lists.nongnu.org/archive/html/qemu-devel/2013-11/msg01188.html (not merge) I will send patch for virtio spec to clarifying this change. Signed-off-by: Amos Kong <akong@redhat.com> Reviewed-by: Vlad Yasevich <vyasevic@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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