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authorShay Drory <shayd@nvidia.com>2023-05-02 13:36:42 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-06-05 09:07:04 +0200
commitb556990235c33460a9d072b93f8dad3822ce4249 (patch)
tree7998129d81342df0c691b00b9d65c342f9b04339
parent57dc3c124e7bf2b937086e4b57c4a834b02c0457 (diff)
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net/mlx5: Devcom, serialize devcom registration
[ Upstream commit 1f893f57a3bf9fe1f4bcb25b55aea7f7f9712fe7 ] From one hand, mlx5 driver is allowing to probe PFs in parallel. From the other hand, devcom, which is a share resource between PFs, is registered without any lock. This might resulted in memory problems. Hence, use the global mlx5_dev_list_lock in order to serialize devcom registration. Fixes: fadd59fc50d0 ("net/mlx5: Introduce inter-device communication mechanism") Signed-off-by: Shay Drory <shayd@nvidia.com> Reviewed-by: Mark Bloch <mbloch@nvidia.com> Signed-off-by: Saeed Mahameed <saeedm@nvidia.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c
index 617eea1b1701..438be215bbd4 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c
@@ -3,6 +3,7 @@
#include <linux/mlx5/vport.h>
#include "lib/devcom.h"
+#include "mlx5_core.h"
static LIST_HEAD(devcom_list);
@@ -77,6 +78,7 @@ struct mlx5_devcom *mlx5_devcom_register_device(struct mlx5_core_dev *dev)
if (MLX5_CAP_GEN(dev, num_lag_ports) != MLX5_DEVCOM_PORTS_SUPPORTED)
return NULL;
+ mlx5_dev_list_lock();
sguid0 = mlx5_query_nic_system_image_guid(dev);
list_for_each_entry(iter, &devcom_list, list) {
struct mlx5_core_dev *tmp_dev = NULL;
@@ -102,8 +104,10 @@ struct mlx5_devcom *mlx5_devcom_register_device(struct mlx5_core_dev *dev)
if (!priv) {
priv = mlx5_devcom_list_alloc();
- if (!priv)
- return ERR_PTR(-ENOMEM);
+ if (!priv) {
+ devcom = ERR_PTR(-ENOMEM);
+ goto out;
+ }
idx = 0;
new_priv = true;
@@ -114,12 +118,14 @@ struct mlx5_devcom *mlx5_devcom_register_device(struct mlx5_core_dev *dev)
if (!devcom) {
if (new_priv)
kfree(priv);
- return ERR_PTR(-ENOMEM);
+ devcom = ERR_PTR(-ENOMEM);
+ goto out;
}
if (new_priv)
list_add(&priv->list, &devcom_list);
-
+out:
+ mlx5_dev_list_unlock();
return devcom;
}
@@ -132,6 +138,7 @@ void mlx5_devcom_unregister_device(struct mlx5_devcom *devcom)
if (IS_ERR_OR_NULL(devcom))
return;
+ mlx5_dev_list_lock();
priv = devcom->priv;
priv->devs[devcom->idx] = NULL;
@@ -142,10 +149,12 @@ void mlx5_devcom_unregister_device(struct mlx5_devcom *devcom)
break;
if (i != MLX5_DEVCOM_PORTS_SUPPORTED)
- return;
+ goto out;
list_del(&priv->list);
kfree(priv);
+out:
+ mlx5_dev_list_unlock();
}
void mlx5_devcom_register_component(struct mlx5_devcom *devcom,