From: Parav Pandit <parav@mellanox.com>
Date: Tue, 21 Apr 2020 05:36:07 -0500
Subject: net/mlx5: E-switch, Fix mutex init order
Patch-mainline: v5.7-rc5
Git-commit: f8d1eddaf94abdc459ccfb881aa7233cb9f7f39a
References: jsc#SLE-15172

In cited patch mutex is initialized after its used.
Below call trace is observed.
Fix the order to initialize the mutex early enough.
Similarly follow mirror sequence during cleanup.

kernel: DEBUG_LOCKS_WARN_ON(lock->magic != lock)
kernel: WARNING: CPU: 5 PID: 45916 at kernel/locking/mutex.c:938
__mutex_lock+0x7d6/0x8a0
kernel: Call Trace:
kernel: ? esw_vport_tbl_get+0x3b/0x250 [mlx5_core]
kernel: ? mark_held_locks+0x55/0x70
kernel: ? __slab_free+0x274/0x400
kernel: ? lockdep_hardirqs_on+0x140/0x1d0
kernel: esw_vport_tbl_get+0x3b/0x250 [mlx5_core]
kernel: ? mlx5_esw_chains_create_fdb_prio+0xa57/0xc20 [mlx5_core]
kernel: mlx5_esw_vport_tbl_get+0x88/0xf0 [mlx5_core]
kernel: mlx5_esw_chains_create+0x2f3/0x3e0 [mlx5_core]
kernel: esw_create_offloads_fdb_tables+0x11d/0x580 [mlx5_core]
kernel: esw_offloads_enable+0x26d/0x540 [mlx5_core]
kernel: mlx5_eswitch_enable_locked+0x155/0x860 [mlx5_core]
kernel: mlx5_devlink_eswitch_mode_set+0x1af/0x320 [mlx5_core]
kernel: devlink_nl_cmd_eswitch_set_doit+0x41/0xb0

Fixes: 96e326878fa5 ("net/mlx5e: Eswitch, Use per vport tables for mirroring")
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -2218,10 +2218,12 @@ static int esw_offloads_steering_init(st
 		total_vports = num_vfs + MLX5_SPECIAL_VPORTS(esw->dev);
 
 	memset(&esw->fdb_table.offloads, 0, sizeof(struct offloads_fdb));
+	mutex_init(&esw->fdb_table.offloads.vports.lock);
+	hash_init(esw->fdb_table.offloads.vports.table);
 
 	err = esw_create_uplink_offloads_acl_tables(esw);
 	if (err)
-		return err;
+		goto create_acl_err;
 
 	err = esw_create_offloads_table(esw, total_vports);
 	if (err)
@@ -2239,9 +2241,6 @@ static int esw_offloads_steering_init(st
 	if (err)
 		goto create_fg_err;
 
-	mutex_init(&esw->fdb_table.offloads.vports.lock);
-	hash_init(esw->fdb_table.offloads.vports.table);
-
 	return 0;
 
 create_fg_err:
@@ -2252,18 +2251,19 @@ create_restore_err:
 	esw_destroy_offloads_table(esw);
 create_offloads_err:
 	esw_destroy_uplink_offloads_acl_tables(esw);
-
+create_acl_err:
+	mutex_destroy(&esw->fdb_table.offloads.vports.lock);
 	return err;
 }
 
 static void esw_offloads_steering_cleanup(struct mlx5_eswitch *esw)
 {
-	mutex_destroy(&esw->fdb_table.offloads.vports.lock);
 	esw_destroy_vport_rx_group(esw);
 	esw_destroy_offloads_fdb_tables(esw);
 	esw_destroy_restore_table(esw);
 	esw_destroy_offloads_table(esw);
 	esw_destroy_uplink_offloads_acl_tables(esw);
+	mutex_destroy(&esw->fdb_table.offloads.vports.lock);
 }
 
 static void