Differential D7595 Diff 19536 sys/dev/hyperv/netvsc/hv_rndis_filter.c

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sys/dev/hyperv/netvsc/hv_rndis_filter.c

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	/*			/*
	* RNDIS filter halt device			* RNDIS filter halt device
	*/			*/
	static int			static int
	hv_rf_halt_device(rndis_device *device)			hv_rf_halt_device(rndis_device *device)
	{			{
	rndis_request *request;			rndis_request *request;
	rndis_halt_request *halt;
	int i, ret;			int i, ret;

	/* Attempt to do a rndis device halt */			/* Attempt to do a rndis device halt */
	request = hv_rndis_request(device, REMOTE_NDIS_HALT_MSG,			request = hv_rndis_request(device, REMOTE_NDIS_HALT_MSG,
	RNDIS_MESSAGE_SIZE(rndis_halt_request));			RNDIS_MESSAGE_SIZE(rndis_halt_request));
	if (request == NULL) {			if (request == NULL) {
	return (-1);			return (-1);
	}			}

	/* initialize "poor man's semaphore" */			/* initialize "poor man's semaphore" */
	request->halt_complete_flag = 0;			request->halt_complete_flag = 0;

	/* Set up the rndis set */
	halt = &request->request_msg.msg.halt_request;
	halt->request_id = atomic_fetchadd_int(&device->new_request_id, 1);
	/* Increment to get the new value (call above returns old value) */
	halt->request_id += 1;

	ret = hv_rf_send_request(device, request, REMOTE_NDIS_HALT_MSG);			ret = hv_rf_send_request(device, request, REMOTE_NDIS_HALT_MSG);
	if (ret != 0) {			if (ret != 0) {
	return (-1);			return (-1);
	}			}

	/*			/*
	* Wait for halt response from halt callback. We must wait for			* Wait for halt response from halt callback. We must wait for
	* the transaction response before freeing the request and other			* the transaction response before freeing the request and other
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