[dpdk-dev] [PATCH] net/mlx5: fix memory event callback list

[dpdk-dev] [PATCH] net/mlx5: fix memory event callback list

[Viacheslav Ovsiienko]

The shared Infiniband device context should be included
into memory event callback list only once on context creation,
and removed from the list only once on context destroying.
Multiple insertions of the same object caused the infinite
loop on the list processing.

Fixes: ccb3815346e6 ("net/mlx5: update memory event callback for shared context")
Cc: stable@dpdk.org

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
---
 drivers/net/mlx5/mlx5.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index a3eacdb..962c0d5 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -412,6 +412,12 @@ struct mlx5_dev_spawn_data {
 		goto error;
 	}
 	mlx5_flow_counters_mng_init(sh);
+	/* 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,
+			 sh, mem_event_cb);
+	rte_rwlock_write_unlock(&mlx5_shared_data->mem_event_rwlock);
+	/* Add context to the global device list. */
 	LIST_INSERT_HEAD(&mlx5_ibv_list, sh, next);
 exit:
 	pthread_mutex_unlock(&mlx5_ibv_list_mutex);
@@ -461,6 +467,11 @@ struct mlx5_dev_spawn_data {
 		goto exit;
 	/* Release created Memory Regions. */
 	mlx5_mr_release(sh);
+	/* Remove from memory callback device list. */
+	rte_rwlock_write_lock(&mlx5_shared_data->mem_event_rwlock);
+	LIST_REMOVE(sh, mem_event_cb);
+	rte_rwlock_write_unlock(&mlx5_shared_data->mem_event_rwlock);
+	/* Remove context from the global device list. */
 	LIST_REMOVE(sh, next);
 	/*
 	 *  Ensure there is no async event handler installed.
@@ -827,11 +838,6 @@ struct mlx5_dev_spawn_data {
 	}
 	mlx5_proc_priv_uninit(dev);
 	mlx5_mprq_free_mp(dev);
-	/* Remove from memory callback device list. */
-	rte_rwlock_write_lock(&mlx5_shared_data->mem_event_rwlock);
-	assert(priv->sh);
-	LIST_REMOVE(priv->sh, mem_event_cb);
-	rte_rwlock_write_unlock(&mlx5_shared_data->mem_event_rwlock);
 	mlx5_free_shared_dr(priv);
 	if (priv->rss_conf.rss_key != NULL)
 		rte_free(priv->rss_conf.rss_key);
@@ -2004,11 +2010,6 @@ struct mlx5_dev_spawn_data {
 		goto error;
 	}
 	priv->config.flow_prio = err;
-	/* 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,
-			 sh, mem_event_cb);
-	rte_rwlock_write_unlock(&mlx5_shared_data->mem_event_rwlock);
 	return eth_dev;
 error:
 	if (priv) {
-- 
1.8.3.1

Re: [dpdk-dev] [PATCH] net/mlx5: fix memory event callback list

[Raslan Darawsheh]

Hi,
> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Viacheslav Ovsiienko
> Sent: Tuesday, August 6, 2019 6:01 PM
> To: dev@dpdk.org
> Cc: Yongseok Koh <yskoh@mellanox.com>; Shahaf Shuler
> <shahafs@mellanox.com>; stable@dpdk.org
> Subject: [dpdk-dev] [PATCH] net/mlx5: fix memory event callback list
> 
> The shared Infiniband device context should be included into memory event
> callback list only once on context creation, and removed from the list only
> once on context destroying.
> Multiple insertions of the same object caused the infinite loop on the list
> processing.
> 
> Fixes: ccb3815346e6 ("net/mlx5: update memory event callback for shared
> context")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
> ---
>  drivers/net/mlx5/mlx5.c | 21 +++++++++++----------
>  1 file changed, 11 insertions(+), 10 deletions(-)
> 

Patch applied to next-net-mlx,

Kindest regards,
Raslan Darawsheh