net/mlx5: E-Switch, Check group pointer before reading bw_share value

BugLink: https://bugs.launchpad.net/bugs/1953731
[ 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>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
index 4501e3d737f8072ab24d389269619479a03a23fe..d377ddc70fc70b072c441d8a512ce98781e17e71 100644 (file)
--- 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;
 }