netdev - [PATCH net-next v1 6/6] net/mlx5e: Use read lock for eswitch get callbacks

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Date:   Mon, 24 Oct 2022 19:59:59 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Leon Romanovsky <leonro@...dia.com>,
        Eric Dumazet <edumazet@...gle.com>, netdev@...r.kernel.org,
        Paolo Abeni <pabeni@...hat.com>,
        Saeed Mahameed <saeedm@...dia.com>
Subject: [PATCH net-next v1 6/6] net/mlx5e: Use read lock for eswitch get callbacks

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

In commit 367dfa121205 ("net/mlx5: Remove devl_unlock from
mlx5_eswtich_mode_callback_enter") all functions were converted
to use write lock without relation to their actual purpose.

Change the devlink eswitch getters to use read and not write locks.

Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 .../ethernet/mellanox/mlx5/core/eswitch_offloads.c   | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 4e50df3139c6..23ada3a71c60 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -3553,9 +3553,9 @@ int mlx5_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
 	if (IS_ERR(esw))
 		return PTR_ERR(esw);
 
-	down_write(&esw->mode_lock);
+	down_read(&esw->mode_lock);
 	err = esw_mode_to_devlink(esw->mode, mode);
-	up_write(&esw->mode_lock);
+	up_read(&esw->mode_lock);
 	return err;
 }
 
@@ -3653,9 +3653,9 @@ int mlx5_devlink_eswitch_inline_mode_get(struct devlink *devlink, u8 *mode)
 	if (IS_ERR(esw))
 		return PTR_ERR(esw);
 
-	down_write(&esw->mode_lock);
+	down_read(&esw->mode_lock);
 	err = esw_inline_mode_to_devlink(esw->offloads.inline_mode, mode);
-	up_write(&esw->mode_lock);
+	up_read(&esw->mode_lock);
 	return err;
 }
 
@@ -3727,9 +3727,9 @@ int mlx5_devlink_eswitch_encap_mode_get(struct devlink *devlink,
 	if (IS_ERR(esw))
 		return PTR_ERR(esw);
 
-	down_write(&esw->mode_lock);
+	down_read(&esw->mode_lock);
 	*encap = esw->offloads.encap;
-	up_write(&esw->mode_lock);
+	up_read(&esw->mode_lock);
 	return 0;
 }
 
-- 
2.37.3