From: Jianbo Liu Date: Thu, 12 Oct 2023 02:00:44 +0000 (+0000) Subject: net/mlx5e: Check the number of elements before walk TC rhashtable X-Git-Tag: v6.6.8~155 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4a95f412b7ee000b279df4842ad227a6eadec89c;p=platform%2Fkernel%2Flinux-starfive.git net/mlx5e: Check the number of elements before walk TC rhashtable [ Upstream commit 4e25b661f484df54b6751b65f9ea2434a3b67539 ] After IPSec TX tables are destroyed, the flow rules in TC rhashtable, which have the destination to IPSec, are restored to the original one, the uplink. However, when the device is in switchdev mode and unload driver with IPSec rules configured, TC rhashtable cleanup is done before IPSec cleanup, which means tc_ht->tbl is already freed when walking TC rhashtable, in order to restore the destination. So add the checking before walking to avoid unexpected behavior. Fixes: d1569537a837 ("net/mlx5e: Modify and restore TC rules for IPSec TX rules") Signed-off-by: Jianbo Liu Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec_fs.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec_fs.c index 13b5916..d5d33c3 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec_fs.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/ipsec_fs.c @@ -152,7 +152,7 @@ void mlx5_esw_ipsec_restore_dest_uplink(struct mlx5_core_dev *mdev) xa_for_each(&esw->offloads.vport_reps, i, rep) { rpriv = rep->rep_data[REP_ETH].priv; - if (!rpriv || !rpriv->netdev) + if (!rpriv || !rpriv->netdev || !atomic_read(&rpriv->tc_ht.nelems)) continue; rhashtable_walk_enter(&rpriv->tc_ht, &iter);