diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index d1041af..142d56f 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -378,9 +378,9 @@ struct rte_fdir_conf fdir_conf = {
 /* Forward function declarations */
 static void map_port_queue_stats_mapping_registers(uint8_t pi, struct rte_port *port);
 static void check_all_ports_link_status(uint32_t port_mask);
-static void eth_event_callback(uint8_t port_id,
-			       enum rte_eth_event_type type,
-			       void *param);
+static int eth_event_callback(uint8_t port_id,
+			      enum rte_eth_event_type type,
+			      void *param, void *ret_param);
 
 /*
  * Check if all the ports are started.
@@ -1826,8 +1826,9 @@ struct pmd_test_command {
 }
 
 /* This function is used by the interrupt thread */
-static void
-eth_event_callback(uint8_t port_id, enum rte_eth_event_type type, void *param)
+static int
+eth_event_callback(uint8_t port_id, enum rte_eth_event_type type, void *param,
+		  void *ret_param)
 {
 	static const char * const event_desc[] = {
 		[RTE_ETH_EVENT_UNKNOWN] = "Unknown",
@@ -1841,6 +1842,7 @@ struct pmd_test_command {
 	};
 
 	RTE_SET_USED(param);
+	RTE_SET_USED(ret_param);
 
 	if (type >= RTE_ETH_EVENT_MAX) {
 		fprintf(stderr, "\nPort %" PRIu8 ": %s called upon invalid event %d\n",
@@ -1861,6 +1863,7 @@ struct pmd_test_command {
 	default:
 		break;
 	}
+	return 0;
 }
 
 static int
diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index 82959ab..e89a28c 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -1438,7 +1438,8 @@ struct bwg_slave {
 	if (slave_eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC) {
 		slave_eth_dev->dev_ops->link_update(slave_eth_dev, 0);
 		bond_ethdev_lsc_event_callback(slave_eth_dev->data->port_id,
-			RTE_ETH_EVENT_INTR_LSC, &bonded_eth_dev->data->port_id);
+			RTE_ETH_EVENT_INTR_LSC, &bonded_eth_dev->data->port_id,
+			NULL);
 	}
 
 	return 0;
@@ -1849,7 +1850,8 @@ struct bwg_slave {
 
 				bond_ethdev_lsc_event_callback(internals->slaves[i].port_id,
 						RTE_ETH_EVENT_INTR_LSC,
-						&bonded_ethdev->data->port_id);
+						&bonded_ethdev->data->port_id,
+						NULL);
 			}
 		}
 		rte_spinlock_unlock(&internals->lock);
@@ -1995,35 +1997,36 @@ struct bwg_slave {
 		return;
 
 	_rte_eth_dev_callback_process((struct rte_eth_dev *)arg,
-			RTE_ETH_EVENT_INTR_LSC, NULL);
+			RTE_ETH_EVENT_INTR_LSC, NULL, NULL);
 }
 
-void
+int
 bond_ethdev_lsc_event_callback(uint8_t port_id, enum rte_eth_event_type type,
-		void *param)
+		void *param, void *ret_param __rte_unused)
 {
 	struct rte_eth_dev *bonded_eth_dev, *slave_eth_dev;
 	struct bond_dev_private *internals;
 	struct rte_eth_link link;
+	int rc = -1;
 
 	int i, valid_slave = 0;
 	uint8_t active_pos;
 	uint8_t lsc_flag = 0;
 
 	if (type != RTE_ETH_EVENT_INTR_LSC || param == NULL)
-		return;
+		return rc;
 
 	bonded_eth_dev = &rte_eth_devices[*(uint8_t *)param];
 	slave_eth_dev = &rte_eth_devices[port_id];
 
 	if (check_for_bonded_ethdev(bonded_eth_dev))
-		return;
+		return rc;
 
 	internals = bonded_eth_dev->data->dev_private;
 
 	/* If the device isn't started don't handle interrupts */
 	if (!bonded_eth_dev->data->dev_started)
-		return;
+		return rc;
 
 	/* verify that port_id is a valid slave of bonded port */
 	for (i = 0; i < internals->slave_count; i++) {
@@ -2034,7 +2037,7 @@ struct bwg_slave {
 	}
 
 	if (!valid_slave)
-		return;
+		return rc;
 
 	/* Search for port in active port list */
 	active_pos = find_slave_by_id(internals->active_slaves,
@@ -2043,7 +2046,7 @@ struct bwg_slave {
 	rte_eth_link_get_nowait(port_id, &link);
 	if (link.link_status) {
 		if (active_pos < internals->active_slave_count)
-			return;
+			return rc;
 
 		/* if no active slave ports then set this port to be primary port */
 		if (internals->active_slave_count < 1) {
@@ -2065,7 +2068,7 @@ struct bwg_slave {
 				RTE_LOG(ERR, PMD,
 					"port %u invalid speed/duplex\n",
 					port_id);
-				return;
+				return rc;
 			}
 		}
 
@@ -2077,7 +2080,7 @@ struct bwg_slave {
 			bond_ethdev_primary_set(internals, port_id);
 	} else {
 		if (active_pos == internals->active_slave_count)
-			return;
+			return rc;
 
 		/* Remove from active slave list */
 		deactivate_slave(bonded_eth_dev, port_id);
@@ -2116,7 +2119,8 @@ struct bwg_slave {
 						(void *)bonded_eth_dev);
 			else
 				_rte_eth_dev_callback_process(bonded_eth_dev,
-						RTE_ETH_EVENT_INTR_LSC, NULL);
+						RTE_ETH_EVENT_INTR_LSC,
+						NULL, NULL);
 
 		} else {
 			if (internals->link_down_delay_ms > 0)
@@ -2125,9 +2129,11 @@ struct bwg_slave {
 						(void *)bonded_eth_dev);
 			else
 				_rte_eth_dev_callback_process(bonded_eth_dev,
-						RTE_ETH_EVENT_INTR_LSC, NULL);
+						RTE_ETH_EVENT_INTR_LSC,
+						NULL, NULL);
 		}
 	}
+	return 0;
 }
 
 static int
diff --git a/drivers/net/bonding/rte_eth_bond_private.h b/drivers/net/bonding/rte_eth_bond_private.h
index b76385f..6c77d20 100644
--- a/drivers/net/bonding/rte_eth_bond_private.h
+++ b/drivers/net/bonding/rte_eth_bond_private.h
@@ -263,9 +263,9 @@ struct bond_dev_private {
 bond_ethdev_primary_set(struct bond_dev_private *internals,
 		uint8_t slave_port_id);
 
-void
+int
 bond_ethdev_lsc_event_callback(uint8_t port_id, enum rte_eth_event_type type,
-		void *param);
+		void *param, void *ret_param);
 
 int
 bond_ethdev_parse_slave_port_kvarg(const char *key,
diff --git a/drivers/net/e1000/em_ethdev.c b/drivers/net/e1000/em_ethdev.c
index 57eb017..cc16fe8 100644
--- a/drivers/net/e1000/em_ethdev.c
+++ b/drivers/net/e1000/em_ethdev.c
@@ -1671,7 +1671,7 @@ static int eth_em_pci_remove(struct rte_pci_device *pci_dev)
 
 	eth_em_interrupt_get_status(dev);
 	eth_em_interrupt_action(dev, dev->intr_handle);
-	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
+	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL, NULL);
 }
 
 static int
diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index 6f9b253..f7dd54a 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -2870,7 +2870,8 @@ static int eth_igb_rxq_interrupt_setup(struct rte_eth_dev *dev)
 		E1000_WRITE_REG(hw, E1000_TCTL, tctl);
 		E1000_WRITE_REG(hw, E1000_RCTL, rctl);
 		E1000_WRITE_FLUSH(hw);
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC,
+					      NULL, NULL);
 	}
 
 	return 0;
@@ -2929,7 +2930,8 @@ void igbvf_mbx_process(struct rte_eth_dev *dev)
 
 	/* PF reset VF event */
 	if (in_msg == E1000_PF_CONTROL_MSG)
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET, NULL);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET,
+					      NULL, NULL);
 }
 
 static int
diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index d026241..d6dee7d 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -430,7 +430,7 @@ int enic_link_update(struct enic *enic)
 	vnic_intr_return_all_credits(&enic->intr);
 
 	enic_link_update(enic);
-	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
+	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL, NULL);
 	enic_log_q_error(enic);
 }
 
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 4c49673..3e81c5d 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -5780,7 +5780,7 @@ struct i40e_vsi *
 			ret = i40e_dev_link_update(dev, 0);
 			if (!ret)
 				_rte_eth_dev_callback_process(dev,
-					RTE_ETH_EVENT_INTR_LSC, NULL);
+					RTE_ETH_EVENT_INTR_LSC, NULL, NULL);
 			break;
 		default:
 			PMD_DRV_LOG(DEBUG, "Request %u is not supported yet",
diff --git a/drivers/net/i40e/i40e_ethdev_vf.c b/drivers/net/i40e/i40e_ethdev_vf.c
index a33ab14..5811793 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1328,7 +1328,8 @@ static int i40evf_dev_xstats_get(struct rte_eth_dev *dev,
 	switch (pf_msg->event) {
 	case I40E_VIRTCHNL_EVENT_RESET_IMPENDING:
 		PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_RESET_IMPENDING event");
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET, NULL);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET,
+					      NULL, NULL);
 		break;
 	case I40E_VIRTCHNL_EVENT_LINK_CHANGE:
 		PMD_DRV_LOG(DEBUG, "VIRTCHNL_EVENT_LINK_CHANGE event");
diff --git a/drivers/net/i40e/i40e_pf.c b/drivers/net/i40e/i40e_pf.c
index 0758503..a21fae1 100644
--- a/drivers/net/i40e/i40e_pf.c
+++ b/drivers/net/i40e/i40e_pf.c
@@ -1231,7 +1231,7 @@
 	struct i40e_pf_vf *vf;
 	/* AdminQ will pass absolute VF id, transfer to internal vf id */
 	uint16_t vf_id = abs_vf_id - hw->func_caps.vf_base_id;
-	struct rte_pmd_i40e_mb_event_param cb_param;
+	struct rte_pmd_i40e_mb_event_param ret_param;
 	bool b_op = TRUE;
 
 	if (vf_id > pf->vf_num - 1 || !pf->vfs) {
@@ -1251,22 +1251,23 @@
 	 * initialise structure to send to user application
 	 * will return response from user in retval field
 	 */
-	cb_param.retval = RTE_PMD_I40E_MB_EVENT_PROCEED;
-	cb_param.vfid = vf_id;
-	cb_param.msg_type = opcode;
-	cb_param.msg = (void *)msg;
-	cb_param.msglen = msglen;
+	ret_param.retval = RTE_PMD_I40E_MB_EVENT_PROCEED;
+	ret_param.vfid = vf_id;
+	ret_param.msg_type = opcode;
+	ret_param.msg = (void *)msg;
+	ret_param.msglen = msglen;
 
 	/**
 	 * Ask user application if we're allowed to perform those functions.
-	 * If we get cb_param.retval == RTE_PMD_I40E_MB_EVENT_PROCEED,
+	 * If we get ret_param.retval == RTE_PMD_I40E_MB_EVENT_PROCEED,
 	 * then business as usual.
 	 * If RTE_PMD_I40E_MB_EVENT_NOOP_ACK or RTE_PMD_I40E_MB_EVENT_NOOP_NACK,
 	 * do nothing and send not_supported to VF. As PF must send a response
 	 * to VF and ACK/NACK is not defined.
 	 */
-	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_VF_MBOX, &cb_param);
-	if (cb_param.retval != RTE_PMD_I40E_MB_EVENT_PROCEED) {
+	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_VF_MBOX,
+				      NULL, &ret_param);
+	if (ret_param.retval != RTE_PMD_I40E_MB_EVENT_PROCEED) {
 		PMD_DRV_LOG(WARNING, "VF to PF message(%d) is not permitted!",
 			    opcode);
 		b_op = FALSE;
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 269c8a5..dd78212 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -4166,12 +4166,13 @@ static int ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
 		ixgbe_dev_link_update(dev, 0);
 		intr->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
 		ixgbe_dev_link_status_print(dev);
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC,
+					      NULL, NULL);
 	}
 
 	if (intr->flags & IXGBE_FLAG_MACSEC) {
 		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_MACSEC,
-					      NULL);
+					      NULL, NULL);
 		intr->flags &= ~IXGBE_FLAG_MACSEC;
 	}
 
@@ -7879,7 +7880,8 @@ static void ixgbevf_mbx_process(struct rte_eth_dev *dev)
 
 	/* PF reset VF event */
 	if (in_msg == IXGBE_PF_CONTROL_MSG)
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET, NULL);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RESET,
+					      NULL, NULL);
 }
 
 static int
diff --git a/drivers/net/ixgbe/ixgbe_pf.c b/drivers/net/ixgbe/ixgbe_pf.c
index 6f30c42..7a7b64d 100644
--- a/drivers/net/ixgbe/ixgbe_pf.c
+++ b/drivers/net/ixgbe/ixgbe_pf.c
@@ -683,7 +683,7 @@ int ixgbe_pf_host_configure(struct rte_eth_dev *eth_dev)
 	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	struct ixgbe_vf_info *vfinfo =
 		*IXGBE_DEV_PRIVATE_TO_P_VFDATA(dev->data->dev_private);
-	struct rte_pmd_ixgbe_mb_event_param cb_param;
+	struct rte_pmd_ixgbe_mb_event_param ret_param;
 
 	retval = ixgbe_read_mbx(hw, msgbuf, mbx_size, vf);
 	if (retval) {
@@ -702,10 +702,10 @@ int ixgbe_pf_host_configure(struct rte_eth_dev *eth_dev)
 	 * initialise structure to send to user application
 	 * will return response from user in retval field
 	 */
-	cb_param.retval = RTE_PMD_IXGBE_MB_EVENT_PROCEED;
-	cb_param.vfid = vf;
-	cb_param.msg_type = msgbuf[0] & 0xFFFF;
-	cb_param.msg = (void *)msgbuf;
+	ret_param.retval = RTE_PMD_IXGBE_MB_EVENT_PROCEED;
+	ret_param.vfid = vf;
+	ret_param.msg_type = msgbuf[0] & 0xFFFF;
+	ret_param.msg = (void *)msgbuf;
 
 	/* perform VF reset */
 	if (msgbuf[0] == IXGBE_VF_RESET) {
@@ -714,20 +714,22 @@ int ixgbe_pf_host_configure(struct rte_eth_dev *eth_dev)
 		vfinfo[vf].clear_to_send = true;
 
 		/* notify application about VF reset */
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_VF_MBOX, &cb_param);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_VF_MBOX,
+					      NULL, &ret_param);
 		return ret;
 	}
 
 	/**
 	 * ask user application if we allowed to perform those functions
-	 * if we get cb_param.retval == RTE_PMD_IXGBE_MB_EVENT_PROCEED
+	 * if we get ret_param.retval == RTE_PMD_IXGBE_MB_EVENT_PROCEED
 	 * then business as usual,
 	 * if 0, do nothing and send ACK to VF
-	 * if cb_param.retval > 1, do nothing and send NAK to VF
+	 * if ret_param.retval > 1, do nothing and send NAK to VF
 	 */
-	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_VF_MBOX, &cb_param);
+	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_VF_MBOX,
+				      NULL, &ret_param);
 
-	retval = cb_param.retval;
+	retval = ret_param.retval;
 
 	/* check & process VF to PF mailbox message */
 	switch ((msgbuf[0] & 0xFFFF)) {
diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
index 5c5cba1..6b0aca6 100644
--- a/drivers/net/nfp/nfp_net.c
+++ b/drivers/net/nfp/nfp_net.c
@@ -1334,7 +1334,7 @@ static void nfp_net_read_mac(struct nfp_net_hw *hw)
 	struct rte_eth_dev *dev = (struct rte_eth_dev *)param;
 
 	nfp_net_link_update(dev, 0);
-	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
+	_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL, NULL);
 
 	nfp_net_dev_link_status_print(dev);
 
diff --git a/drivers/net/sfc/sfc_intr.c b/drivers/net/sfc/sfc_intr.c
index 7eb4b86..26a9c03 100644
--- a/drivers/net/sfc/sfc_intr.c
+++ b/drivers/net/sfc/sfc_intr.c
@@ -111,7 +111,8 @@
 			 sa->eth_dev->data->dev_link.link_status ?
 			 "UP" : "DOWN");
 		_rte_eth_dev_callback_process(sa->eth_dev,
-					      RTE_ETH_EVENT_INTR_LSC, NULL);
+					      RTE_ETH_EVENT_INTR_LSC,
+					      NULL, NULL);
 	}
 }
 
@@ -152,7 +153,8 @@
 	if (lsc_seq != sa->port.lsc_seq) {
 		sfc_info(sa, "link status change event");
 		_rte_eth_dev_callback_process(sa->eth_dev,
-					      RTE_ETH_EVENT_INTR_LSC, NULL);
+					      RTE_ETH_EVENT_INTR_LSC,
+					      NULL, NULL);
 	}
 }
 
diff --git a/drivers/net/thunderx/nicvf_ethdev.c b/drivers/net/thunderx/nicvf_ethdev.c
index ddcfaba..fb9c4c9 100644
--- a/drivers/net/thunderx/nicvf_ethdev.c
+++ b/drivers/net/thunderx/nicvf_ethdev.c
@@ -111,7 +111,8 @@ static void nicvf_vf_stop(struct rte_eth_dev *dev, struct nicvf *nic,
 	if (nicvf_reg_poll_interrupts(nic) == NIC_MBOX_MSG_BGX_LINK_CHANGE) {
 		if (dev->data->dev_conf.intr_conf.lsc)
 			nicvf_set_eth_link_status(nic, &dev->data->dev_link);
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC,
+					      NULL, NULL);
 	}
 
 	rte_eal_alarm_set(NICVF_INTR_POLL_INTERVAL_MS * 1000,
diff --git a/drivers/net/vhost/rte_eth_vhost.c b/drivers/net/vhost/rte_eth_vhost.c
index 257bf6d..98b3675 100644
--- a/drivers/net/vhost/rte_eth_vhost.c
+++ b/drivers/net/vhost/rte_eth_vhost.c
@@ -607,7 +607,8 @@ struct vhost_xstats_name_off {
 
 	RTE_LOG(INFO, PMD, "New connection established\n");
 
-	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
+	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC,
+				      NULL, NULL);
 
 	return 0;
 }
@@ -661,7 +662,8 @@ struct vhost_xstats_name_off {
 
 	RTE_LOG(INFO, PMD, "Connection closed\n");
 
-	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
+	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_INTR_LSC,
+				      NULL, NULL);
 }
 
 static int
@@ -690,7 +692,8 @@ struct vhost_xstats_name_off {
 	RTE_LOG(INFO, PMD, "vring%u is %s\n",
 			vring, enable ? "enabled" : "disabled");
 
-	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE, NULL);
+	_rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_QUEUE_STATE,
+				      NULL, NULL);
 
 	return 0;
 }
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 763fef5..256b19a 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1229,7 +1229,8 @@ static int virtio_dev_xstats_get_names(struct rte_eth_dev *dev,
 	if (isr & VIRTIO_PCI_ISR_CONFIG) {
 		if (virtio_dev_link_update(dev, 0) == 0)
 			_rte_eth_dev_callback_process(dev,
-						      RTE_ETH_EVENT_INTR_LSC, NULL);
+						      RTE_ETH_EVENT_INTR_LSC,
+						      NULL, NULL);
 	}
 
 }
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 83898a8..bdb56ba 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -1,7 +1,7 @@
 /*-
  *   BSD LICENSE
  *
- *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
  *   All rights reserved.
  *
  *   Redistribution and use in source and binary forms, with or without
@@ -129,6 +129,7 @@ struct rte_eth_dev_callback {
 	TAILQ_ENTRY(rte_eth_dev_callback) next; /**< Callbacks list */
 	rte_eth_dev_cb_fn cb_fn;                /**< Callback address */
 	void *cb_arg;                           /**< Parameter for callback */
+	void *ret_param;                        /**< Return parameter */
 	enum rte_eth_event_type event;          /**< Interrupt event type */
 	uint32_t active;                        /**< Callback is executing */
 };
@@ -2718,12 +2719,13 @@ int rte_eth_set_queue_rate_limit(uint8_t port_id, uint16_t queue_idx,
 	return ret;
 }
 
-void
+int
 _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
-	enum rte_eth_event_type event, void *cb_arg)
+	enum rte_eth_event_type event, void *cb_arg, void *ret_param)
 {
 	struct rte_eth_dev_callback *cb_lst;
 	struct rte_eth_dev_callback dev_cb;
+	int rc = 0;
 
 	rte_spinlock_lock(&rte_eth_dev_cb_lock);
 	TAILQ_FOREACH(cb_lst, &(dev->link_intr_cbs), next) {
@@ -2733,14 +2735,17 @@ int rte_eth_set_queue_rate_limit(uint8_t port_id, uint16_t queue_idx,
 		cb_lst->active = 1;
 		if (cb_arg != NULL)
 			dev_cb.cb_arg = cb_arg;
+		if (ret_param != NULL)
+			dev_cb.ret_param = ret_param;
 
 		rte_spinlock_unlock(&rte_eth_dev_cb_lock);
-		dev_cb.cb_fn(dev->data->port_id, dev_cb.event,
-						dev_cb.cb_arg);
+		rc = dev_cb.cb_fn(dev->data->port_id, dev_cb.event,
+				dev_cb.cb_arg, dev_cb.ret_param);
 		rte_spinlock_lock(&rte_eth_dev_cb_lock);
 		cb_lst->active = 0;
 	}
 	rte_spinlock_unlock(&rte_eth_dev_cb_lock);
+	return rc;
 }
 
 int
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 0f38b45..fad6ae5 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1,7 +1,7 @@
 /*-
  *   BSD LICENSE
  *
- *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2010-2017 Intel Corporation. All rights reserved.
  *   All rights reserved.
  *
  *   Redistribution and use in source and binary forms, with or without
@@ -3401,8 +3401,8 @@ enum rte_eth_event_type {
 	RTE_ETH_EVENT_MAX       /**< max value of this enum */
 };
 
-typedef void (*rte_eth_dev_cb_fn)(uint8_t port_id, \
-		enum rte_eth_event_type event, void *cb_arg);
+typedef int (*rte_eth_dev_cb_fn)(uint8_t port_id,
+		enum rte_eth_event_type event, void *cb_arg, void *ret_param);
 /**< user application callback to be registered for interrupts */
 
 
@@ -3419,11 +3419,6 @@ typedef void (*rte_eth_dev_cb_fn)(uint8_t port_id, \
  * @param cb_arg
  *  Pointer to the parameters for the registered callback.
  *
- *  The user data is overwritten in the case of RTE_ETH_EVENT_VF_MBOX.
- *	This even occurs when a message from the VF is received by the PF.
- *	The user data is overwritten with struct rte_pmd_ixgbe_mb_event_param.
- *	This struct is defined in rte_pmd_ixgbe.h.
- *
  * @return
  *  - On success, zero.
  *  - On failure, a negative value.
@@ -3463,15 +3458,17 @@ int rte_eth_dev_callback_unregister(uint8_t port_id,
  * @param event
  *  Eth device interrupt event type.
  * @param cb_arg
- *  Update callback parameter to pass data back to user application.
+ *  callback parameter.
+ * @param ret_param
+ *  To pass data back to user application.
  *  This allows the user application to decide if a particular function
  *  is permitted or not.
  *
  * @return
- *  void
+ *  int
  */
-void _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
-				enum rte_eth_event_type event, void *cb_arg);
+int _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
+		enum rte_eth_event_type event, void *cb_arg, void *ret_param);
 
 /**
  * When there is no rx packet coming in Rx Queue for a long time, we can
diff --git a/lib/librte_ether/rte_ether_version.map b/lib/librte_ether/rte_ether_version.map
index d6726bb..77df47a 100644
--- a/lib/librte_ether/rte_ether_version.map
+++ b/lib/librte_ether/rte_ether_version.map
@@ -156,3 +156,10 @@ DPDK_17.05 {
 	rte_eth_xstats_get_names_by_id;
 
 } DPDK_17.02;
+
+DPDK_17.08 {
+	global:
+
+	_rte_eth_dev_callback_process;
+
+} DPDK_17.05;
