From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] xen-netfront: wait xenbus state change when load
 module manually
Date: Sun, 29 Jul 2018 08:30:40 -0700 (PDT)
Message-ID: <20180729.083040.53901922165497594.davem@davemloft.net>
References: <20180727095608.25210-1-xiliang@redhat.com>
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From: Xiao Liang <xiliang@redhat.com>
Date: Fri, 27 Jul 2018 17:56:08 +0800

> @@ -1330,6 +1331,11 @@ static struct net_device *xennet_create_dev(struct xenbus_device *dev)
>  	netif_carrier_off(netdev);
>  
>  	xenbus_switch_state(dev, XenbusStateInitialising);
> +	wait_event(module_load_q,
> +			   xenbus_read_driver_state(dev->otherend) !=
> +			   XenbusStateClosed &&
> +			   xenbus_read_driver_state(dev->otherend) !=
> +			   XenbusStateUnknown);
>  	return netdev;
>  
>   exit:

What performs the wakeups that will trigger for this sleep site?

Thank you.