netdev - [net 03/11] net/mlx5: E-switch, Set to legacy mode if failed to change switchdev mode

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Date:   Wed,  2 Nov 2022 23:55:39 -0700
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>
Cc:     Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...dia.com>, Chris Mi <cmi@...dia.com>,
        Roi Dayan <roid@...dia.com>
Subject: [net 03/11] net/mlx5: E-switch, Set to legacy mode if failed to change switchdev mode

From: Chris Mi <cmi@...dia.com>

No need to rollback to the other mode because probably will fail
again. Just set to legacy mode and clear fdb table created flag.
So that fdb table will not be cleared again.

Fixes: f019679ea5f2 ("net/mlx5: E-switch, Remove dependency between sriov and eswitch mode")
Signed-off-by: Chris Mi <cmi@...dia.com>
Reviewed-by: Roi Dayan <roid@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 .../net/ethernet/mellanox/mlx5/core/eswitch.c  | 14 ++++++++------
 .../mellanox/mlx5/core/eswitch_offloads.c      | 18 +++---------------
 2 files changed, 11 insertions(+), 21 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index c59107fa9e6d..2169486c4bfb 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -1387,12 +1387,14 @@ void mlx5_eswitch_disable_locked(struct mlx5_eswitch *esw)
 		 esw->mode == MLX5_ESWITCH_LEGACY ? "LEGACY" : "OFFLOADS",
 		 esw->esw_funcs.num_vfs, esw->enabled_vports);
 
-	esw->fdb_table.flags &= ~MLX5_ESW_FDB_CREATED;
-	if (esw->mode == MLX5_ESWITCH_OFFLOADS)
-		esw_offloads_disable(esw);
-	else if (esw->mode == MLX5_ESWITCH_LEGACY)
-		esw_legacy_disable(esw);
-	mlx5_esw_acls_ns_cleanup(esw);
+	if (esw->fdb_table.flags & MLX5_ESW_FDB_CREATED) {
+		esw->fdb_table.flags &= ~MLX5_ESW_FDB_CREATED;
+		if (esw->mode == MLX5_ESWITCH_OFFLOADS)
+			esw_offloads_disable(esw);
+		else if (esw->mode == MLX5_ESWITCH_LEGACY)
+			esw_legacy_disable(esw);
+		mlx5_esw_acls_ns_cleanup(esw);
+	}
 
 	if (esw->mode == MLX5_ESWITCH_OFFLOADS)
 		devl_rate_nodes_destroy(devlink);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 4e50df3139c6..728ca9f2bb9d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -2310,7 +2310,7 @@ static int esw_create_restore_table(struct mlx5_eswitch *esw)
 static int esw_offloads_start(struct mlx5_eswitch *esw,
 			      struct netlink_ext_ack *extack)
 {
-	int err, err1;
+	int err;
 
 	esw->mode = MLX5_ESWITCH_OFFLOADS;
 	err = mlx5_eswitch_enable_locked(esw, esw->dev->priv.sriov.num_vfs);
@@ -2318,11 +2318,6 @@ static int esw_offloads_start(struct mlx5_eswitch *esw,
 		NL_SET_ERR_MSG_MOD(extack,
 				   "Failed setting eswitch to offloads");
 		esw->mode = MLX5_ESWITCH_LEGACY;
-		err1 = mlx5_eswitch_enable_locked(esw, MLX5_ESWITCH_IGNORE_NUM_VFS);
-		if (err1) {
-			NL_SET_ERR_MSG_MOD(extack,
-					   "Failed setting eswitch back to legacy");
-		}
 		mlx5_rescan_drivers(esw->dev);
 	}
 	if (esw->offloads.inline_mode == MLX5_INLINE_MODE_NONE) {
@@ -3389,19 +3384,12 @@ int esw_offloads_enable(struct mlx5_eswitch *esw)
 static int esw_offloads_stop(struct mlx5_eswitch *esw,
 			     struct netlink_ext_ack *extack)
 {
-	int err, err1;
+	int err;
 
 	esw->mode = MLX5_ESWITCH_LEGACY;
 	err = mlx5_eswitch_enable_locked(esw, MLX5_ESWITCH_IGNORE_NUM_VFS);
-	if (err) {
+	if (err)
 		NL_SET_ERR_MSG_MOD(extack, "Failed setting eswitch to legacy");
-		esw->mode = MLX5_ESWITCH_OFFLOADS;
-		err1 = mlx5_eswitch_enable_locked(esw, MLX5_ESWITCH_IGNORE_NUM_VFS);
-		if (err1) {
-			NL_SET_ERR_MSG_MOD(extack,
-					   "Failed setting eswitch back to offloads");
-		}
-	}
 
 	return err;
 }
-- 
2.38.1