netdev - [net 08/13] net/mlx5: E-Switch, Check group pointer before reading bw

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Date:   Tue, 30 Nov 2021 22:37:04 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Dmytro Linkin <dlinkin@...dia.com>,
        Roi Dayan <roid@...dia.com>, Saeed Mahameed <saeedm@...dia.com>
Subject: [net 08/13] net/mlx5: E-Switch, Check group pointer before reading bw_share value

From: Dmytro Linkin <dlinkin@...dia.com>

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@...dia.com>
Reviewed-by: Roi Dayan <roid@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 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 4501e3d737f8..d377ddc70fc7 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;
 }
-- 
2.31.1