[dpdk-dev] [PATCH] net/mlx5: fix crash when configure is not called

[Adrien Mazarguil]

Although uncommon, applications may destroy a device immediately after
probing it without going through dev_configure() first.

This patch addresses a crash which occurs when mlx5_dev_close() calls
mlx5_mr_release() due to an uninitialized entry in the private structure.

Fixes: 974f1e7ef146 ("net/mlx5: add new memory region support")
Cc: Yongseok Koh <ys...@mellanox.com>

Signed-off-by: Adrien Mazarguil <adrien.mazarg...@6wind.com>
---
 drivers/net/mlx5/mlx5.c        | 7 +++++++
 drivers/net/mlx5/mlx5_ethdev.c | 4 ----
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 36d72f757..11b395b64 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -34,6 +34,8 @@
 #include <rte_config.h>
 #include <rte_eal_memconfig.h>
 #include <rte_kvargs.h>
+#include <rte_rwlock.h>
+#include <rte_spinlock.h>
 
 #include "mlx5.h"
 #include "mlx5_utils.h"
@@ -1145,6 +1147,11 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv 
__rte_unused,
                        goto port_error;
                }
                priv->config.max_verbs_prio = verb_priorities;
+               /* Add device to memory callback list. */
+               rte_rwlock_write_lock(&mlx5_shared_data->mem_event_rwlock);
+               LIST_INSERT_HEAD(&mlx5_shared_data->mem_event_cb_list,
+                                priv, mem_event_cb);
+               rte_rwlock_write_unlock(&mlx5_shared_data->mem_event_rwlock);
                rte_eth_dev_probing_finish(eth_dev);
                continue;
 port_error:
diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index c52ec6fb7..f6cebae41 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -403,10 +403,6 @@ mlx5_dev_configure(struct rte_eth_dev *dev)
                /* rte_errno is already set. */
                return -rte_errno;
        }
-       rte_rwlock_write_lock(&mlx5_shared_data->mem_event_rwlock);
-       LIST_INSERT_HEAD(&mlx5_shared_data->mem_event_cb_list,
-                        priv, mem_event_cb);
-       rte_rwlock_write_unlock(&mlx5_shared_data->mem_event_rwlock);
        return 0;
 }
 
-- 
2.11.0