netdev - [PATCH net-next v3 3/8] net/mlx5: Drop extra layer of locks in IPsec

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Message-ID: <8c50d16c8cbb07ea0aaeeabbbf9439ee3eb6490b.1692262560.git.leonro@nvidia.com>
Date: Thu, 17 Aug 2023 12:11:25 +0300
From: Leon Romanovsky <leon@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>
Cc: Leon Romanovsky <leonro@...dia.com>,
	Dima Chumak <dchumak@...dia.com>,
	Jiri Pirko <jiri@...nulli.us>,
	Jonathan Corbet <corbet@....net>,
	linux-doc@...r.kernel.org,
	netdev@...r.kernel.org,
	Saeed Mahameed <saeedm@...dia.com>,
	Steffen Klassert <steffen.klassert@...unet.com>,
	Simon Horman <simon.horman@...igine.com>
Subject: [PATCH net-next v3 3/8] net/mlx5: Drop extra layer of locks in IPsec

From: Leon Romanovsky <leonro@...dia.com>

There is no need in holding devlink lock as it gives nothing
compared to already used write mode_lock.

Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 .../mellanox/mlx5/core/eswitch_offloads.c      | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 46b8c60ac39a..ef2bb04f10be 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -3879,38 +3879,28 @@ int mlx5_devlink_eswitch_inline_mode_get(struct devlink *devlink, u8 *mode)
 
 bool mlx5_eswitch_block_encap(struct mlx5_core_dev *dev)
 {
-	struct devlink *devlink = priv_to_devlink(dev);
-	struct mlx5_eswitch *esw;
+	struct mlx5_eswitch *esw = dev->priv.eswitch;
 
-	devl_lock(devlink);
-	esw = mlx5_devlink_eswitch_get(devlink);
-	if (IS_ERR(esw)) {
-		devl_unlock(devlink);
-		/* Failure means no eswitch => not possible to change encap */
+	if (!mlx5_esw_allowed(esw))
 		return true;
-	}
 
 	down_write(&esw->mode_lock);
 	if (esw->mode != MLX5_ESWITCH_LEGACY &&
 	    esw->offloads.encap != DEVLINK_ESWITCH_ENCAP_MODE_NONE) {
 		up_write(&esw->mode_lock);
-		devl_unlock(devlink);
 		return false;
 	}
 
 	esw->offloads.num_block_encap++;
 	up_write(&esw->mode_lock);
-	devl_unlock(devlink);
 	return true;
 }
 
 void mlx5_eswitch_unblock_encap(struct mlx5_core_dev *dev)
 {
-	struct devlink *devlink = priv_to_devlink(dev);
-	struct mlx5_eswitch *esw;
+	struct mlx5_eswitch *esw = dev->priv.eswitch;
 
-	esw = mlx5_devlink_eswitch_get(devlink);
-	if (IS_ERR(esw))
+	if (!mlx5_esw_allowed(esw))
 		return;
 
 	down_write(&esw->mode_lock);
-- 
2.41.0