netdev - [PATCH net 4/6] net/mlx5e: Use channel mdev reference instead of global mdev instance for coalescing

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240411115444.374475-5-tariqt@nvidia.com>
Date: Thu, 11 Apr 2024 14:54:42 +0300
From: Tariq Toukan <tariqt@...dia.com>
To: "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>, Eric Dumazet <edumazet@...gle.com>
CC: <netdev@...r.kernel.org>, Saeed Mahameed <saeedm@...dia.com>, Gal Pressman
	<gal@...dia.com>, Leon Romanovsky <leonro@...dia.com>, Rahul Rameshbabu
	<rrameshbabu@...dia.com>, Tariq Toukan <tariqt@...dia.com>
Subject: [PATCH net 4/6] net/mlx5e: Use channel mdev reference instead of global mdev instance for coalescing

From: Rahul Rameshbabu <rrameshbabu@...dia.com>

Channels can potentially have independent mdev instances. Do not refer to
the global mdev instance in the mlx5e_priv instance for channel FW
operations related to coalescing. CQ numbers that would be valid on the
channel's mdev instance may not be correctly referenced if using the
mlx5e_priv instance.

Fixes: 67936e138586 ("net/mlx5e: Let channels be SD-aware")
Signed-off-by: Rahul Rameshbabu <rrameshbabu@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index 8f101181648c..67a29826bb57 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -589,12 +589,12 @@ static int mlx5e_get_coalesce(struct net_device *netdev,
 static void
 mlx5e_set_priv_channels_tx_coalesce(struct mlx5e_priv *priv, struct ethtool_coalesce *coal)
 {
-	struct mlx5_core_dev *mdev = priv->mdev;
 	int tc;
 	int i;
 
 	for (i = 0; i < priv->channels.num; ++i) {
 		struct mlx5e_channel *c = priv->channels.c[i];
+		struct mlx5_core_dev *mdev = c->mdev;
 
 		for (tc = 0; tc < c->num_tc; tc++) {
 			mlx5_core_modify_cq_moderation(mdev,
@@ -608,11 +608,11 @@ mlx5e_set_priv_channels_tx_coalesce(struct mlx5e_priv *priv, struct ethtool_coal
 static void
 mlx5e_set_priv_channels_rx_coalesce(struct mlx5e_priv *priv, struct ethtool_coalesce *coal)
 {
-	struct mlx5_core_dev *mdev = priv->mdev;
 	int i;
 
 	for (i = 0; i < priv->channels.num; ++i) {
 		struct mlx5e_channel *c = priv->channels.c[i];
+		struct mlx5_core_dev *mdev = c->mdev;
 
 		mlx5_core_modify_cq_moderation(mdev, &c->rq.cq.mcq,
 					       coal->rx_coalesce_usecs,
-- 
2.44.0