diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 0c383deba..9bbf1eb7d 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -435,6 +435,15 @@ mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
 	priv_unlock(priv);
 }
 
+/**
+ * Get supported packet types.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   A pointer to the supported Packet types array.
+ */
 const uint32_t *
 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
 {
@@ -467,6 +476,9 @@ mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
  *
  * @param dev
  *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   0 on success, -1 on error.
  */
 static int
 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev)
@@ -530,6 +542,9 @@ mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev)
  *
  * @param dev
  *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   0 on success, -1 on error.
  */
 static int
 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev)
@@ -733,6 +748,9 @@ priv_force_link_status_change(struct priv *priv, int status)
  *   Pointer to Ethernet device structure.
  * @param wait_to_complete
  *   Wait for request completion (ignored).
+ *
+ * @return
+ *   0 on success, -1 on error.
  */
 int
 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete __rte_unused)
diff --git a/drivers/net/mlx5/mlx5_mr.c b/drivers/net/mlx5/mlx5_mr.c
index 4e1495800..8748ddcf5 100644
--- a/drivers/net/mlx5/mlx5_mr.c
+++ b/drivers/net/mlx5/mlx5_mr.c
@@ -242,6 +242,7 @@ mlx5_mp2mr_iter(struct rte_mempool *mp, void *arg)
  *   Pointer to private structure.
  * @param mp
  *   Pointer to the memory pool to register.
+ *
  * @return
  *   The memory region on success.
  */
@@ -302,6 +303,7 @@ priv_mr_new(struct priv *priv, struct rte_mempool *mp)
  *   Pointer to private structure.
  * @param mp
  *   Pointer to the memory pool to register.
+ *
  * @return
  *   The memory region on success.
  */
@@ -352,9 +354,10 @@ priv_mr_release(struct priv *priv __rte_unused, struct mlx5_mr *mr)
  * Verify the flow list is empty
  *
  * @param priv
- *  Pointer to private structure.
+ *   Pointer to private structure.
  *
- * @return the number of object not released.
+ * @return
+ *   The number of object not released.
  */
 int
 priv_mr_verify(struct priv *priv)
diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index 2fc6e08aa..6924202cc 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -883,9 +883,10 @@ mlx5_priv_rxq_ibv_release(struct priv *priv, struct mlx5_rxq_ibv *rxq_ibv)
  * Verify the Verbs Rx queue list is empty
  *
  * @param priv
- *  Pointer to private structure.
+ *   Pointer to private structure.
  *
- * @return the number of object not released.
+ * @return
+ *   The number of object not released.
  */
 int
 mlx5_priv_rxq_ibv_verify(struct priv *priv)
@@ -1139,9 +1140,10 @@ mlx5_priv_rxq_releasable(struct priv *priv, uint16_t idx)
  * Verify the Rx Queue list is empty
  *
  * @param priv
- *  Pointer to private structure.
+ *   Pointer to private structure.
  *
- * @return the number of object not released.
+ * @return
+ *   The number of object not released.
  */
 int
 mlx5_priv_rxq_verify(struct priv *priv)
@@ -1293,9 +1295,10 @@ mlx5_priv_ind_table_ibv_release(struct priv *priv,
  * Verify the Rx Queue list is empty
  *
  * @param priv
- *  Pointer to private structure.
+ *   Pointer to private structure.
  *
- * @return the number of object not released.
+ * @return
+ *   The number of object not released.
  */
 int
 mlx5_priv_ind_table_ibv_verify(struct priv *priv)
@@ -1462,9 +1465,10 @@ mlx5_priv_hrxq_release(struct priv *priv, struct mlx5_hrxq *hrxq)
  * Verify the Rx Queue list is empty
  *
  * @param priv
- *  Pointer to private structure.
+ *   Pointer to private structure.
  *
- * @return the number of object not released.
+ * @return
+ *   The number of object not released.
  */
 int
 mlx5_priv_hrxq_ibv_verify(struct priv *priv)
diff --git a/drivers/net/mlx5/mlx5_trigger.c b/drivers/net/mlx5/mlx5_trigger.c
index 72e8ff644..b147fb4f8 100644
--- a/drivers/net/mlx5/mlx5_trigger.c
+++ b/drivers/net/mlx5/mlx5_trigger.c
@@ -14,6 +14,12 @@
 #include "mlx5_rxtx.h"
 #include "mlx5_utils.h"
 
+/**
+ * Stop traffic on Tx queues.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ */
 static void
 priv_txq_stop(struct priv *priv)
 {
@@ -23,6 +29,15 @@ priv_txq_stop(struct priv *priv)
 		mlx5_priv_txq_release(priv, i);
 }
 
+/**
+ * Start traffic on Tx queues.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   0 on success, errno on error.
+ */
 static int
 priv_txq_start(struct priv *priv)
 {
@@ -58,6 +73,12 @@ priv_txq_start(struct priv *priv)
 	return ret;
 }
 
+/**
+ * Stop traffic on Rx queues.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ */
 static void
 priv_rxq_stop(struct priv *priv)
 {
@@ -67,6 +88,15 @@ priv_rxq_stop(struct priv *priv)
 		mlx5_priv_rxq_release(priv, i);
 }
 
+/**
+ * Start traffic on Rx queues.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   0 on success, errno on error.
+ */
 static int
 priv_rxq_start(struct priv *priv)
 {
diff --git a/drivers/net/mlx5/mlx5_txq.c b/drivers/net/mlx5/mlx5_txq.c
index 1a508a488..9be707840 100644
--- a/drivers/net/mlx5/mlx5_txq.c
+++ b/drivers/net/mlx5/mlx5_txq.c
@@ -614,9 +614,10 @@ mlx5_priv_txq_ibv_releasable(struct priv *priv __rte_unused,
  * Verify the Verbs Tx queue list is empty
  *
  * @param priv
- *  Pointer to private structure.
+ *   Pointer to private structure.
  *
- * @return the number of object not released.
+ * @return
+ *   The number of object not released.
  */
 int
 mlx5_priv_txq_ibv_verify(struct priv *priv)
@@ -893,9 +894,10 @@ mlx5_priv_txq_releasable(struct priv *priv, uint16_t idx)
  * Verify the Tx Queue list is empty
  *
  * @param priv
- *  Pointer to private structure.
+ *   Pointer to private structure.
  *
- * @return the number of object not released.
+ * @return
+ *   The number of object not released.
  */
 int
 mlx5_priv_txq_verify(struct priv *priv)
