From: Bernard Iremonger <bernard.iremonger@intel.com>
Date: Thu, 15 Jun 2017 12:29:50 +0000 (+0100)
Subject: ethdev: add return values to callback process API
X-Git-Tag: spdx-start~2922
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=d6af1a13d7a14d062d11b37f6e31caa0f3823fe0;p=dpdk.git

ethdev: add return values to callback process API

Change the rte_eth_dev_callback_process function to return int,
and add a void *ret_param parameter.
The new parameter is used by ixgbe and i40e instead of abusing
the user data of the callback.

Signed-off-by: Bernard Iremonger <bernard.iremonger@intel.com>
---

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index b29328a69d..b3ad83b1ee 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -381,9 +381,9 @@ uint8_t bitrate_enabled;
 /* 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.
@@ -1829,8 +1829,9 @@ rmv_event_callback(void *arg)
 }
 
 /* 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",
@@ -1844,6 +1845,7 @@ eth_event_callback(uint8_t port_id, enum rte_eth_event_type type, void *param)
 	};
 
 	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",
@@ -1864,6 +1866,7 @@ eth_event_callback(uint8_t port_id, enum rte_eth_event_type type, void *param)
 	default:
 		break;
 	}
+	return 0;
 }
 
 static int
diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 1861816342..2e708dbe0d 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -34,10 +34,6 @@ Deprecation Notices
 * The struct ``rte_pci_driver`` is planned to be removed from
   ``rte_cryptodev_driver`` and ``rte_eventdev_driver`` in 17.08.
 
-* ethdev: An API change is planned for 17.08 for the function
-  ``_rte_eth_dev_callback_process``. In 17.08 the function will return an ``int``
-  instead of ``void`` and a fourth parameter ``void *ret_param`` will be added.
-
 * The mbuf flags PKT_RX_VLAN_PKT and PKT_RX_QINQ_PKT are deprecated and
   are respectively replaced by PKT_RX_VLAN_STRIPPED and
   PKT_RX_QINQ_STRIPPED, that are better described. The old flags and
diff --git a/drivers/net/bnxt/rte_pmd_bnxt.c b/drivers/net/bnxt/rte_pmd_bnxt.c
index faeb6f4678..fa11d1ccd1 100644
--- a/drivers/net/bnxt/rte_pmd_bnxt.c
+++ b/drivers/net/bnxt/rte_pmd_bnxt.c
@@ -57,7 +57,7 @@ int bnxt_rcv_msg_from_vf(struct bnxt *bp, uint16_t vf_id, void *msg)
 	cb_param.msg = msg;
 
 	_rte_eth_dev_callback_process(bp->eth_dev, RTE_ETH_EVENT_VF_MBOX,
-			&cb_param);
+			&cb_param, NULL);
 
 	/* Default to approve */
 	if (cb_param.retval == RTE_PMD_BNXT_MB_EVENT_PROCEED)
diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index a8d9780273..35fe90673f 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -1438,7 +1438,8 @@ slave_configure(struct rte_eth_dev *bonded_eth_dev,
 	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 @@ bond_ethdev_slave_link_status_change_monitor(void *cb_arg)
 
 				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 @@ bond_ethdev_delayed_lsc_propagation(void *arg)
 		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 @@ bond_ethdev_lsc_event_callback(uint8_t port_id, enum rte_eth_event_type type,
 	}
 
 	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 @@ bond_ethdev_lsc_event_callback(uint8_t port_id, enum rte_eth_event_type type,
 	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 @@ bond_ethdev_lsc_event_callback(uint8_t port_id, enum rte_eth_event_type type,
 				RTE_LOG(ERR, PMD,
 					"port %u invalid speed/duplex\n",
 					port_id);
-				return;
+				return rc;
 			}
 		}
 
@@ -2077,7 +2080,7 @@ bond_ethdev_lsc_event_callback(uint8_t port_id, enum rte_eth_event_type type,
 			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 @@ bond_ethdev_lsc_event_callback(uint8_t port_id, enum rte_eth_event_type type,
 						(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 @@ bond_ethdev_lsc_event_callback(uint8_t port_id, enum rte_eth_event_type type,
 						(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 50d908d519..53470f61e8 100644
--- a/drivers/net/bonding/rte_eth_bond_private.h
+++ b/drivers/net/bonding/rte_eth_bond_private.h
@@ -260,9 +260,9 @@ void
 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 ba505e72d2..3d4ab93687 100644
--- a/drivers/net/e1000/em_ethdev.c
+++ b/drivers/net/e1000/em_ethdev.c
@@ -1670,7 +1670,7 @@ eth_em_interrupt_handler(void *param)
 
 	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 a0da9d541a..da03d9bb34 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -2898,7 +2898,8 @@ eth_igb_interrupt_action(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;
@@ -2957,7 +2958,8 @@ 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 2192c7f202..40dbec7fa2 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -430,7 +430,7 @@ enic_intr_handler(void *arg)
 	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 4ee111320e..e02fbb17ee 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -5804,7 +5804,7 @@ i40e_dev_handle_aq_msg(struct rte_eth_dev *dev)
 			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 2d5a9b55d8..91c1c0f68b 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -1328,7 +1328,8 @@ i40evf_handle_pf_event(struct rte_eth_dev *dev, uint8_t *msg,
 	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 0758503e69..a21fae1d7e 100644
--- a/drivers/net/i40e/i40e_pf.c
+++ b/drivers/net/i40e/i40e_pf.c
@@ -1231,7 +1231,7 @@ i40e_pf_host_handle_vf_msg(struct rte_eth_dev *dev,
 	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 @@ i40e_pf_host_handle_vf_msg(struct rte_eth_dev *dev,
 	 * 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 ebc5467ca2..39c744038b 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -4155,12 +4155,13 @@ ixgbe_dev_interrupt_delayed_handler(void *param)
 		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;
 	}
 
@@ -7868,7 +7869,8 @@ 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 a56b2706a9..c0d86c7689 100644
--- a/drivers/net/ixgbe/ixgbe_pf.c
+++ b/drivers/net/ixgbe/ixgbe_pf.c
@@ -683,7 +683,7 @@ ixgbe_rcv_msg_from_vf(struct rte_eth_dev *dev, uint16_t vf)
 	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 @@ ixgbe_rcv_msg_from_vf(struct rte_eth_dev *dev, uint16_t vf)
 	 * 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 @@ ixgbe_rcv_msg_from_vf(struct rte_eth_dev *dev, uint16_t vf)
 		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/mlx4/mlx4.c b/drivers/net/mlx4/mlx4.c
index 5bc2a50223..16cafae7d7 100644
--- a/drivers/net/mlx4/mlx4.c
+++ b/drivers/net/mlx4/mlx4.c
@@ -5411,7 +5411,8 @@ mlx4_dev_link_status_handler(void *arg)
 	ret = priv_dev_status_handler(priv, dev, &events);
 	priv_unlock(priv);
 	if (ret > 0 && events & (1 << RTE_ETH_EVENT_INTR_LSC))
-		_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);
 }
 
 /**
@@ -5440,7 +5441,8 @@ mlx4_dev_interrupt_handler(void *cb_arg)
 		     i++) {
 			if (ev & (1 << i)) {
 				ev &= ~(1 << i);
-				_rte_eth_dev_callback_process(dev, i, NULL);
+				_rte_eth_dev_callback_process(dev, i, NULL,
+							      NULL);
 				ret--;
 			}
 		}
diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index eadf452b9e..96bccd5fd2 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -1262,7 +1262,8 @@ mlx5_dev_link_status_handler(void *arg)
 	ret = priv_dev_link_status_handler(priv, dev);
 	priv_unlock(priv);
 	if (ret)
-		_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);
 }
 
 /**
@@ -1284,7 +1285,8 @@ mlx5_dev_interrupt_handler(void *cb_arg)
 	ret = priv_dev_link_status_handler(priv, dev);
 	priv_unlock(priv);
 	if (ret)
-		_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);
 }
 
 /**
diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
index 0ee7fb8275..3b41e2e231 100644
--- a/drivers/net/nfp/nfp_net.c
+++ b/drivers/net/nfp/nfp_net.c
@@ -1334,7 +1334,7 @@ nfp_net_dev_interrupt_delayed_handler(void *param)
 	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 dfa453a705..ee59cb1c05 100644
--- a/drivers/net/sfc/sfc_intr.c
+++ b/drivers/net/sfc/sfc_intr.c
@@ -111,7 +111,8 @@ exit:
 			 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 @@ exit:
 	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 471cc16882..e9636739a4 100644
--- a/drivers/net/thunderx/nicvf_ethdev.c
+++ b/drivers/net/thunderx/nicvf_ethdev.c
@@ -111,7 +111,8 @@ nicvf_interrupt(void *arg)
 	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 ebcfb28f8e..0dac5e60ec 100644
--- a/drivers/net/vhost/rte_eth_vhost.c
+++ b/drivers/net/vhost/rte_eth_vhost.c
@@ -607,7 +607,8 @@ new_device(int vid)
 
 	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 @@ destroy_device(int vid)
 
 	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 @@ vring_state_changed(int vid, uint16_t vring, int enable)
 	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 371f170572..5c826f4774 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1229,7 +1229,8 @@ virtio_interrupt_handler(void *param)
 	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/examples/link_status_interrupt/main.c b/examples/link_status_interrupt/main.c
index 25da28eb29..d58578939e 100644
--- a/examples/link_status_interrupt/main.c
+++ b/examples/link_status_interrupt/main.c
@@ -469,14 +469,16 @@ lsi_parse_args(int argc, char **argv)
  *  Pointer to(address of) the parameters.
  *
  * @return
- *  void.
+ *  int.
  */
-static void
-lsi_event_callback(uint8_t port_id, enum rte_eth_event_type type, void *param)
+static int
+lsi_event_callback(uint8_t port_id, enum rte_eth_event_type type, void *param,
+		    void *ret_param)
 {
 	struct rte_eth_link link;
 
 	RTE_SET_USED(param);
+	RTE_SET_USED(ret_param);
 
 	printf("\n\nIn registered callback...\n");
 	printf("Event type: %s\n", type == RTE_ETH_EVENT_INTR_LSC ? "LSC interrupt" : "unknown event");
@@ -488,6 +490,8 @@ lsi_event_callback(uint8_t port_id, enum rte_eth_event_type type, void *param)
 				("full-duplex") : ("half-duplex"));
 	} else
 		printf("Port %d Link Down\n\n", port_id);
+
+	return 0;
 }
 
 /* Check the link status of all ports in up to 9s, and print them finally */
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 81a45c060c..71a576cedb 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 */
 };
@@ -2717,12 +2718,13 @@ rte_eth_dev_callback_unregister(uint8_t port_id,
 	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) {
@@ -2732,14 +2734,17 @@ _rte_eth_dev_callback_process(struct rte_eth_dev *dev,
 		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 f6e6c74f77..c6ab4c0529 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
@@ -3337,8 +3337,8 @@ 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 */
 
 
@@ -3355,11 +3355,6 @@ 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.
@@ -3399,15 +3394,17 @@ 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 e0881f09d3..019a93dafd 100644
--- a/lib/librte_ether/rte_ether_version.map
+++ b/lib/librte_ether/rte_ether_version.map
@@ -1,7 +1,6 @@
 DPDK_2.2 {
 	global:
 
-	_rte_eth_dev_callback_process;
 	rte_eth_add_rx_callback;
 	rte_eth_add_tx_callback;
 	rte_eth_allmulticast_disable;
@@ -152,6 +151,7 @@ DPDK_17.05 {
 DPDK_17.08 {
 	global:
 
+	_rte_eth_dev_callback_process;
 	rte_flow_isolate;
 
 } DPDK_17.05;
diff --git a/test/test/test_link_bonding.c b/test/test/test_link_bonding.c
index 57830391a5..aa2a1a27a7 100644
--- a/test/test/test_link_bonding.c
+++ b/test/test/test_link_bonding.c
@@ -1173,15 +1173,19 @@ test_adding_slave_after_bonded_device_started(void)
 int test_lsc_interrupt_count;
 
 
-static void
+static int
 test_bonding_lsc_event_callback(uint8_t port_id __rte_unused,
-		enum rte_eth_event_type type  __rte_unused, void *param __rte_unused)
+		enum rte_eth_event_type type  __rte_unused,
+		void *param __rte_unused,
+		void *ret_param __rte_unused)
 {
 	pthread_mutex_lock(&mutex);
 	test_lsc_interrupt_count++;
 
 	pthread_cond_signal(&cvar);
 	pthread_mutex_unlock(&mutex);
+
+	return 0;
 }
 
 static inline int
diff --git a/test/test/virtual_pmd.c b/test/test/virtual_pmd.c
index f1ea3e16e2..db99894bef 100644
--- a/test/test/virtual_pmd.c
+++ b/test/test/virtual_pmd.c
@@ -484,7 +484,8 @@ virtual_ethdev_simulate_link_status_interrupt(uint8_t port_id,
 
 	vrtl_eth_dev->data->dev_link.link_status = link_status;
 
-	_rte_eth_dev_callback_process(vrtl_eth_dev, RTE_ETH_EVENT_INTR_LSC, NULL);
+	_rte_eth_dev_callback_process(vrtl_eth_dev, RTE_ETH_EVENT_INTR_LSC,
+				      NULL, NULL);
 }
 
 int