From: Saeed Mahameed <saeed@kernel.org>
To: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org, Tariq Toukan <tariqt@nvidia.com>,
Leon Romanovsky <leonro@nvidia.com>, Aya Levin <ayal@nvidia.com>,
Maxim Mikityanskiy <maximmi@mellanox.com>,
Saeed Mahameed <saeedm@nvidia.com>
Subject: [net 12/16] net/mlx5e: Fix error path of updating netdev queues
Date: Tue, 18 May 2021 23:05:19 -0700 [thread overview]
Message-ID: <20210519060523.17875-13-saeed@kernel.org> (raw)
In-Reply-To: <20210519060523.17875-1-saeed@kernel.org>
From: Aya Levin <ayal@nvidia.com>
Avoid division by zero in the error flow. In the driver TC number can be
either 1 or 8. When TC count is set to 1, driver zero netdev->num_tc.
Hence, need to convert it back from 0 to 1 in the error flow.
Fixes: fa3748775b92 ("net/mlx5e: Handle errors from netif_set_real_num_{tx,rx}_queues")
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
drivers/net/ethernet/mellanox/mlx5/core/en_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 89937b055070..d1b9a4040d60 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -2697,7 +2697,7 @@ static int mlx5e_update_netdev_queues(struct mlx5e_priv *priv)
int err;
old_num_txqs = netdev->real_num_tx_queues;
- old_ntc = netdev->num_tc;
+ old_ntc = netdev->num_tc ? : 1;
nch = priv->channels.params.num_channels;
ntc = priv->channels.params.num_tc;
--
2.31.1
next prev parent reply other threads:[~2021-05-19 6:06 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-19 6:05 [pull request][net 00/16] mlx5 fixes 2021-05-18 Saeed Mahameed
2021-05-19 6:05 ` [net 01/16] {net, RDMA}/mlx5: Fix override of log_max_qp by other device Saeed Mahameed
2021-05-19 19:30 ` patchwork-bot+netdevbpf
2021-05-19 6:05 ` [net 02/16] net/mlx5e: Fix nullptr in add_vlan_push_action() Saeed Mahameed
2021-05-19 6:05 ` [net 03/16] net/mlx5: Set reformat action when needed for termination rules Saeed Mahameed
2021-05-19 6:05 ` [net 04/16] net/mlx5: Fix err prints and return when creating termination table Saeed Mahameed
2021-05-19 6:05 ` [net 05/16] net/mlx5: SF, Fix show state inactive when its inactivated Saeed Mahameed
2021-05-19 6:05 ` [net 06/16] net/mlx5e: Fix nullptr in mlx5e_tc_add_fdb_flow() Saeed Mahameed
2021-05-19 6:05 ` [net 07/16] net/mlx5e: Fix null deref accessing lag dev Saeed Mahameed
2021-05-19 6:05 ` [net 08/16] net/mlx5e: Make sure fib dev exists in fib event Saeed Mahameed
2021-05-19 6:05 ` [net 09/16] net/mlx5e: reset XPS on error flow if netdev isn't registered yet Saeed Mahameed
2021-05-19 6:05 ` [net 10/16] net/mlx5e: Fix multipath lag activation Saeed Mahameed
2021-05-19 6:05 ` [net 11/16] net/mlx5e: Reject mirroring on source port change encap rules Saeed Mahameed
2021-05-19 6:05 ` Saeed Mahameed [this message]
2021-05-19 6:05 ` [net 13/16] {net,vdpa}/mlx5: Configure interface MAC into mpfs L2 table Saeed Mahameed
2021-05-19 6:05 ` [net 14/16] net/mlx5: Don't overwrite HCA capabilities when setting MSI-X count Saeed Mahameed
2021-05-19 6:05 ` [net 15/16] net/mlx5: Set term table as an unmanaged flow table Saeed Mahameed
2021-05-19 6:05 ` [net 16/16] mlx5e: add add missing BH locking around napi_schdule() Saeed Mahameed
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