net/mlx5: fix memory region cleanup

[ upstream commit f8753ea ]

mlx5 driver has a global list of Memory Regions created by
device, and there is a ml5_mr_release() routine which makes
a memory cleanup at device closing. The head of device MR list
was fetched outside the rwlock protected section. Also some
noticed typos are fixed.

Fixes: 974f1e7 ("net/mlx5: add new memory region support")

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Yongseok Koh <yskoh@mellanox.com>

drivers/net/mlx5/mlx5_mr.c

@@ -465,7 +465,7 @@ mr_free(struct mlx5_mr *mr)
 }
 
 /**
- * Releass resources of detached MR having no online entry.
+ * Release resources of detached MR having no online entry.
  *
  * @param dev
  *   Pointer to Ethernet device.
@@ -515,7 +515,7 @@ mr_find_contig_memsegs_cb(const struct rte_memseg_list *msl,
 }
 
 /**
- * Create a new global Memroy Region (MR) for a missing virtual address.
+ * Create a new global Memory Region (MR) for a missing virtual address.
  * Register entire virtually contiguous memory chunk around the address.
  *
  * @param dev
@@ -623,7 +623,7 @@ mlx5_mr_create(struct rte_eth_dev *dev, struct mlx5_mr_cache *entry,
 	bmp_mem = RTE_PTR_ALIGN_CEIL(mr + 1, RTE_CACHE_LINE_SIZE);
 	mr->ms_bmp = rte_bitmap_init(ms_n, bmp_mem, bmp_size);
 	if (mr->ms_bmp == NULL) {
-		DEBUG("port %u unable to initialize bitamp for a new MR of"
+		DEBUG("port %u unable to initialize bitmap for a new MR of"
 		      " address (%p).",
 		      dev->data->port_id, (void *)addr);
 		rte_errno = EINVAL;
@@ -1350,7 +1350,7 @@ void
 mlx5_mr_release(struct rte_eth_dev *dev)
 {
 	struct mlx5_priv *priv = dev->data->dev_private;
-	struct mlx5_mr *mr_next = LIST_FIRST(&priv->mr.mr_list);
+	struct mlx5_mr *mr_next;
 
 	/* Remove from memory callback device list. */
 	rte_rwlock_write_lock(&mlx5_shared_data->mem_event_rwlock);
@@ -1360,6 +1360,7 @@ mlx5_mr_release(struct rte_eth_dev *dev)
 		mlx5_mr_dump_dev(dev);
 	rte_rwlock_write_lock(&priv->mr.rwlock);
 	/* Detach from MR list and move to free list. */
+	mr_next = LIST_FIRST(&priv->mr.mr_list);
 	while (mr_next != NULL) {
 		struct mlx5_mr *mr = mr_next;