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authorAya Levin <ayal@nvidia.com>2021-04-21 14:26:31 +0300
committerSaeed Mahameed <saeedm@nvidia.com>2021-05-18 23:01:46 -0700
commit5e7923acbd86d0ff29269688d8a9c47ad091dd46 (patch)
treeeeeaf1a5b2f1cce31967999d11a53374bc7c8039
parent7d1a3d08c8a6398e7497a98cf3f7b73ea13d9939 (diff)
downloadlinux-5e7923acbd86d0ff29269688d8a9c47ad091dd46.tar.bz2
net/mlx5e: Fix error path of updating netdev queues
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>
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/en_main.c2
1 files changed, 1 insertions, 1 deletions
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;