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d2945e757e
If guest doesn't initialize the net device, the tx thread will block at the first tx_cond wait. When virtio_net_tx_stop is invoked, the tx_thread will block on second tx_cond then. Check whether we should exit tx_thread after first tx_cond waiting Signed-off-by: Yin Fengwei <fengwei.yin@intel.com> Reviewed-by: Hao Li <hao.l.li@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>