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net/mlx5e: HTB, Fix inconsistencies with QoS SQs number 

When creating a new HTB class while the interface is down,
the variable that follows the number of QoS SQs (htb_max_qos_sqs)
may not be consistent with the number of HTB classes.

Previously, we compared these two values to ensure that
the node_qid is lower than the number of QoS SQs, and we
allocated stats for that SQ when they are equal.

Change the check to compare the node_qid with the current
number of leaf nodes and fix the checking conditions to
ensure allocation of stats_list and stats for each node.

Fixes: 214baf2287 ("net/mlx5e: Support HTB offload")
Signed-off-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20240409190820.227554-9-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Carolina Jubran 2024-04-09 22:08:16 +03:00 committed by Jakub Kicinski
parent ecb829459a
commit 2f436f1869
1 changed files with 17 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/net/ethernet/mellanox/mlx5/core/en/qos.c
View File

@ -83,24 +83,25 @@ int mlx5e_open_qos_sq(struct mlx5e_priv *priv, struct mlx5e_channels *chs,
txq_ix = mlx5e_qid_from_qos(chs, node_qid);
WARN_ON(node_qid > priv->htb_max_qos_sqs);
if (node_qid == priv->htb_max_qos_sqs) {
struct mlx5e_sq_stats *stats, **stats_list = NULL;
WARN_ON(node_qid >= mlx5e_htb_cur_leaf_nodes(priv->htb));
if (!priv->htb_qos_sq_stats) {
struct mlx5e_sq_stats **stats_list;
if (priv->htb_max_qos_sqs == 0) {
stats_list = kvcalloc(mlx5e_qos_max_leaf_nodes(priv->mdev),
sizeof(*stats_list),
GFP_KERNEL);
if (!stats_list)
return -ENOMEM;
}
stats = kzalloc(sizeof(*stats), GFP_KERNEL);
if (!stats) {
kvfree(stats_list);
stats_list = kvcalloc(mlx5e_qos_max_leaf_nodes(priv->mdev),
sizeof(*stats_list), GFP_KERNEL);
if (!stats_list)
return -ENOMEM;
}
if (stats_list)
WRITE_ONCE(priv->htb_qos_sq_stats, stats_list);
WRITE_ONCE(priv->htb_qos_sq_stats, stats_list);
}
if (!priv->htb_qos_sq_stats[node_qid]) {
struct mlx5e_sq_stats *stats;
stats = kzalloc(sizeof(*stats), GFP_KERNEL);
if (!stats)
return -ENOMEM;
WRITE_ONCE(priv->htb_qos_sq_stats[node_qid], stats);
/* Order htb_max_qos_sqs increment after writing the array pointer.
* Pairs with smp_load_acquire in en_stats.c.