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  3.   0079-netdrv-net-mlx5-E-switch-Prepare-code-to-handle-vpor.patch
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From a549a6c259fc46e49b55d5b7ce5ad1478d9a80b8 Mon Sep 17 00:00:00 2001
From: Alaa Hleihel <ahleihel@redhat.com>
Date: Sun, 10 May 2020 15:03:56 -0400
Subject: [PATCH 079/312] [netdrv] net/mlx5: E-switch, Prepare code to handle
 vport enable error

Message-id: <20200510150452.10307-32-ahleihel@redhat.com>
Patchwork-id: 306655
Patchwork-instance: patchwork
O-Subject: [RHEL8.3 BZ 1789380 v2 31/87] net/mlx5: E-switch, Prepare code to handle vport enable error
Bugzilla: 1789380
RH-Acked-by: Kamal Heib <kheib@redhat.com>
RH-Acked-by: Jarod Wilson <jarod@redhat.com>
RH-Acked-by: Tony Camuso <tcamuso@redhat.com>
RH-Acked-by: Jonathan Toppins <jtoppins@redhat.com>

Bugzilla: http://bugzilla.redhat.com/1789380
Upstream: v5.5-rc1

commit 925a6acc77a70f8b5bfd0df75e36557aa400b0a0
Author: Parav Pandit <parav@mellanox.com>
Date:   Mon Oct 28 23:35:15 2019 +0000

    net/mlx5: E-switch, Prepare code to handle vport enable error

    In subsequent patch, esw_enable_vport() could fail and return error.
    Prepare code to handle such error.

    Signed-off-by: Parav Pandit <parav@mellanox.com>
    Reviewed-by: Vu Pham <vuhuong@mellanox.com>
    Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Signed-off-by: Alaa Hleihel <ahleihel@redhat.com>
Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/eswitch.c  | 62 ++++++++++++++++------
 drivers/net/ethernet/mellanox/mlx5/core/eswitch.h  |  2 +-
 .../ethernet/mellanox/mlx5/core/eswitch_offloads.c |  5 +-
 3 files changed, 50 insertions(+), 19 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
index 8067667fd59e..2ecb993545f9 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
@@ -443,6 +443,13 @@ static int esw_create_legacy_table(struct mlx5_eswitch *esw)
 	return err;
 }
 
+static void esw_destroy_legacy_table(struct mlx5_eswitch *esw)
+{
+	esw_cleanup_vepa_rules(esw);
+	esw_destroy_legacy_fdb_table(esw);
+	esw_destroy_legacy_vepa_table(esw);
+}
+
 #define MLX5_LEGACY_SRIOV_VPORT_EVENTS (MLX5_VPORT_UC_ADDR_CHANGE | \
 					MLX5_VPORT_MC_ADDR_CHANGE | \
 					MLX5_VPORT_PROMISC_CHANGE)
@@ -459,15 +466,10 @@ static int esw_legacy_enable(struct mlx5_eswitch *esw)
 	mlx5_esw_for_each_vf_vport(esw, i, vport, esw->esw_funcs.num_vfs)
 		vport->info.link_state = MLX5_VPORT_ADMIN_STATE_AUTO;
 
-	mlx5_eswitch_enable_pf_vf_vports(esw, MLX5_LEGACY_SRIOV_VPORT_EVENTS);
-	return 0;
-}
-
-static void esw_destroy_legacy_table(struct mlx5_eswitch *esw)
-{
-	esw_cleanup_vepa_rules(esw);
-	esw_destroy_legacy_fdb_table(esw);
-	esw_destroy_legacy_vepa_table(esw);
+	ret = mlx5_eswitch_enable_pf_vf_vports(esw, MLX5_LEGACY_SRIOV_VPORT_EVENTS);
+	if (ret)
+		esw_destroy_legacy_table(esw);
+	return ret;
 }
 
 static void esw_legacy_disable(struct mlx5_eswitch *esw)
@@ -1699,8 +1701,8 @@ static void esw_legacy_vport_destroy_drop_counters(struct mlx5_vport *vport)
 		mlx5_fc_destroy(dev, vport->egress.legacy.drop_counter);
 }
 
-static void esw_enable_vport(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
-			     enum mlx5_eswitch_vport_event enabled_events)
+static int esw_enable_vport(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
+			    enum mlx5_eswitch_vport_event enabled_events)
 {
 	u16 vport_num = vport->vport;
 
@@ -1738,6 +1740,7 @@ static void esw_enable_vport(struct mlx5_eswitch *esw, struct mlx5_vport *vport,
 	esw->enabled_vports++;
 	esw_debug(esw->dev, "Enabled VPORT(%d)\n", vport_num);
 	mutex_unlock(&esw->state_lock);
+	return 0;
 }
 
 static void esw_disable_vport(struct mlx5_eswitch *esw,
@@ -1862,26 +1865,51 @@ static void mlx5_eswitch_clear_vf_vports_info(struct mlx5_eswitch *esw)
 /* mlx5_eswitch_enable_pf_vf_vports() enables vports of PF, ECPF and VFs
  * whichever are present on the eswitch.
  */
-void
+int
 mlx5_eswitch_enable_pf_vf_vports(struct mlx5_eswitch *esw,
 				 enum mlx5_eswitch_vport_event enabled_events)
 {
 	struct mlx5_vport *vport;
+	int num_vfs;
+	int ret;
 	int i;
 
 	/* Enable PF vport */
 	vport = mlx5_eswitch_get_vport(esw, MLX5_VPORT_PF);
-	esw_enable_vport(esw, vport, enabled_events);
+	ret = esw_enable_vport(esw, vport, enabled_events);
+	if (ret)
+		return ret;
 
-	/* Enable ECPF vports */
+	/* Enable ECPF vport */
 	if (mlx5_ecpf_vport_exists(esw->dev)) {
 		vport = mlx5_eswitch_get_vport(esw, MLX5_VPORT_ECPF);
-		esw_enable_vport(esw, vport, enabled_events);
+		ret = esw_enable_vport(esw, vport, enabled_events);
+		if (ret)
+			goto ecpf_err;
 	}
 
 	/* Enable VF vports */
-	mlx5_esw_for_each_vf_vport(esw, i, vport, esw->esw_funcs.num_vfs)
-		esw_enable_vport(esw, vport, enabled_events);
+	mlx5_esw_for_each_vf_vport(esw, i, vport, esw->esw_funcs.num_vfs) {
+		ret = esw_enable_vport(esw, vport, enabled_events);
+		if (ret)
+			goto vf_err;
+	}
+	return 0;
+
+vf_err:
+	num_vfs = i - 1;
+	mlx5_esw_for_each_vf_vport_reverse(esw, i, vport, num_vfs)
+		esw_disable_vport(esw, vport);
+
+	if (mlx5_ecpf_vport_exists(esw->dev)) {
+		vport = mlx5_eswitch_get_vport(esw, MLX5_VPORT_ECPF);
+		esw_disable_vport(esw, vport);
+	}
+
+ecpf_err:
+	vport = mlx5_eswitch_get_vport(esw, MLX5_VPORT_PF);
+	esw_disable_vport(esw, vport);
+	return ret;
 }
 
 /* mlx5_eswitch_disable_pf_vf_vports() disables vports of PF, ECPF and VFs
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index f12d446e2c87..d29df0c302f2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -626,7 +626,7 @@ bool mlx5_eswitch_is_vf_vport(const struct mlx5_eswitch *esw, u16 vport_num);
 void mlx5_eswitch_update_num_of_vfs(struct mlx5_eswitch *esw, const int num_vfs);
 int mlx5_esw_funcs_changed_handler(struct notifier_block *nb, unsigned long type, void *data);
 
-void
+int
 mlx5_eswitch_enable_pf_vf_vports(struct mlx5_eswitch *esw,
 				 enum mlx5_eswitch_vport_event enabled_events);
 void mlx5_eswitch_disable_pf_vf_vports(struct mlx5_eswitch *esw);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 00d126fa6e02..b33543c5f68f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -2158,7 +2158,9 @@ int esw_offloads_enable(struct mlx5_eswitch *esw)
 	mlx5_esw_for_each_vf_vport(esw, i, vport, esw->esw_funcs.num_vfs)
 		vport->info.link_state = MLX5_VPORT_ADMIN_STATE_DOWN;
 
-	mlx5_eswitch_enable_pf_vf_vports(esw, MLX5_VPORT_UC_ADDR_CHANGE);
+	err = mlx5_eswitch_enable_pf_vf_vports(esw, MLX5_VPORT_UC_ADDR_CHANGE);
+	if (err)
+		goto err_vports;
 
 	err = esw_offloads_load_all_reps(esw);
 	if (err)
@@ -2171,6 +2173,7 @@ int esw_offloads_enable(struct mlx5_eswitch *esw)
 
 err_reps:
 	mlx5_eswitch_disable_pf_vf_vports(esw);
+err_vports:
 	esw_set_passing_vport_metadata(esw, false);
 err_vport_metadata:
 	esw_offloads_steering_cleanup(esw);
-- 
2.13.6

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