[PATCH 5.15 166/207] net/mlx5: E-Switch, Check group pointer before reading bw_share value

Greg Kroah-Hartman
2021-12-06T15:44:16Z

From: Dmytro Linkin <dlinkin@nvidia.com>

[ Upstream commit 5c4e8ae7aa4875041102406801ee434e6c581aef ]

If log_esw_max_sched_depth is not supported group pointer of the vport
is NULL. Hence, check the pointer before reading bw_share value.

Fixes: 0fe132eac38c ("net/mlx5: E-switch, Allow to add vports to rate groups")
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
index 4501e3d737f80..d377ddc70fc70 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
@@ -130,7 +130,7 @@ static u32 esw_qos_calculate_min_rate_divider(struct mlx5_eswitch *esw,
/* If vports min rate divider is 0 but their group has bw_share configured, then
* need to set bw_share for vports to minimal value.
*/
- if (!group_level && !max_guarantee && group->bw_share)
+ if (!group_level && !max_guarantee && group && group->bw_share)
return 1;
return 0;
}
--
2.33.0