[dpdk-dev] [PATCH] net/mlx4: fix memory region cleanup routine

[Viacheslav Ovsiienko <viacheslavo@mellanox.com>]

mlx4 driver has a global list of Memory Regions created by
device, and there is a ml4_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: 9797bfcce1c9 ("net/mlx4: add new memory region support")
Cc: stable@dpdk.org

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
Acked-by: Yongseok Koh <yskoh@mellanox.com>
---
 drivers/net/mlx4/mlx4_mr.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/net/mlx4/mlx4_mr.c b/drivers/net/mlx4/mlx4_mr.c
index ad7d483..48d458a 100644
--- a/drivers/net/mlx4/mlx4_mr.c
+++ b/drivers/net/mlx4/mlx4_mr.c
@@ -477,7 +477,7 @@ struct mr_update_mp_data {
 }
 
 /**
- * Releass resources of detached MR having no online entry.
+ * Release resources of detached MR having no online entry.
  *
  * @param dev
  *   Pointer to Ethernet device.
@@ -527,7 +527,7 @@ struct mr_update_mp_data {
 }
 
 /**
- * Create a new global Memroy Region (MR) for a missing virtual address.
+ * Create a new global Memory Region (MR) for a missing virtual address.
  * This API should be called on a secondary process, then a request is sent to
  * the primary process in order to create a MR for the address. As the global MR
  * list is on the shared memory, following LKey lookup should succeed unless the
@@ -573,7 +573,7 @@ struct mr_update_mp_data {
 }
 
 /**
- * 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.
  * This must be called from the primary process.
  *
@@ -682,7 +682,7 @@ struct mr_update_mp_data {
 	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) {
-		WARN("port %u unable to initialize bitamp for a new MR of"
+		WARN("port %u unable to initialize bitmap for a new MR of"
 		     " address (%p).",
 		     dev->data->port_id, (void *)addr);
 		rte_errno = EINVAL;
@@ -820,7 +820,7 @@ struct mr_update_mp_data {
 }
 
 /**
- * Create a new global Memroy Region (MR) for a missing virtual address.
+ * Create a new global Memory Region (MR) for a missing virtual address.
  * This can be called from primary and secondary process.
  *
  * @param dev
@@ -1434,7 +1434,7 @@ struct mr_update_mp_data {
 mlx4_mr_release(struct rte_eth_dev *dev)
 {
 	struct mlx4_priv *priv = dev->data->dev_private;
-	struct mlx4_mr *mr_next = LIST_FIRST(&priv->mr.mr_list);
+	struct mlx4_mr *mr_next;
 
 	/* Remove from memory callback device list. */
 	rte_rwlock_write_lock(&mlx4_shared_data->mem_event_rwlock);
@@ -1445,6 +1445,7 @@ struct mr_update_mp_data {
 #endif
 	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 mlx4_mr *mr = mr_next;
 
-- 
1.8.3.1