netdev - [PATCH net-next 3/9] net/mlx5: Move fw reset unload to mlx5_fw_reset_complete

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Date:   Wed, 27 Jul 2022 20:03:30 +0300
From:   Moshe Shemesh <moshe@...dia.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        "Tariq Toukan" <tariqt@...dia.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>
CC:     Jiri Pirko <jiri@...dia.com>, <netdev@...r.kernel.org>,
        Moshe Shemesh <moshe@...dia.com>
Subject: [PATCH net-next 3/9] net/mlx5: Move fw reset unload to mlx5_fw_reset_complete_reload

Refactor fw reset code to have the unload driver part done on
mlx5_fw_reset_complete_reload(), so if it was called by the PF which
initiated the reload fw activate flow, the unload part will be handled
by the mlx5_devlink_reload_fw_activate() callback itself and not by the
reset event work.

This will be used by the downstream patch to invoke devlink reload
callbacks with devlink lock held.

Signed-off-by: Moshe Shemesh <moshe@...dia.com>
Reviewed-by: Jiri Pirko <jiri@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/devlink.c  | 11 ++++++++++-
 drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c | 10 +++-------
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index f85166e587f2..41bb50d94caa 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -104,7 +104,16 @@ static int mlx5_devlink_reload_fw_activate(struct devlink *devlink, struct netli
 	if (err)
 		return err;
 
-	return mlx5_fw_reset_wait_reset_done(dev);
+	err = mlx5_fw_reset_wait_reset_done(dev);
+	if (err)
+		return err;
+
+	mlx5_unload_one(dev);
+	err = mlx5_health_wait_pci_up(dev);
+	if (err)
+		NL_SET_ERR_MSG_MOD(extack, "FW activate aborted, PCI reads fail after reset");
+
+	return err;
 }
 
 static int mlx5_devlink_trigger_fw_live_patch(struct devlink *devlink,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
index 052af4901c0b..e8896f368362 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
@@ -149,6 +149,9 @@ static void mlx5_fw_reset_complete_reload(struct mlx5_core_dev *dev)
 	if (test_bit(MLX5_FW_RESET_FLAGS_PENDING_COMP, &fw_reset->reset_flags)) {
 		complete(&fw_reset->done);
 	} else {
+		mlx5_unload_one(dev);
+		if (mlx5_health_wait_pci_up(dev))
+			mlx5_core_err(dev, "reset reload flow aborted, PCI reads still not working\n");
 		mlx5_load_one(dev, false);
 		devlink_remote_reload_actions_performed(priv_to_devlink(dev), 0,
 							BIT(DEVLINK_RELOAD_ACTION_DRIVER_REINIT) |
@@ -183,15 +186,9 @@ static void mlx5_sync_reset_reload_work(struct work_struct *work)
 	struct mlx5_fw_reset *fw_reset = container_of(work, struct mlx5_fw_reset,
 						      reset_reload_work);
 	struct mlx5_core_dev *dev = fw_reset->dev;
-	int err;
 
 	mlx5_sync_reset_clear_reset_requested(dev, false);
 	mlx5_enter_error_state(dev, true);
-	mlx5_unload_one(dev);
-	err = mlx5_health_wait_pci_up(dev);
-	if (err)
-		mlx5_core_err(dev, "reset reload flow aborted, PCI reads still not working\n");
-	fw_reset->ret = err;
 	mlx5_fw_reset_complete_reload(dev);
 }
 
@@ -395,7 +392,6 @@ static void mlx5_sync_reset_now_event(struct work_struct *work)
 	}
 
 	mlx5_enter_error_state(dev, true);
-	mlx5_unload_one(dev);
 done:
 	fw_reset->ret = err;
 	mlx5_fw_reset_complete_reload(dev);
-- 
2.18.2