netdev - [patch net-next 2/4] net/mlx5: Lift reload limitation when SFs are present

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Message-ID: <20230815145155.1946926-3-jiri@resnulli.us>
Date: Tue, 15 Aug 2023 16:51:53 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: netdev@...r.kernel.org
Cc: kuba@...nel.org,
	pabeni@...hat.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	moshe@...dia.com,
	saeedm@...dia.com,
	shayd@...dia.com,
	leon@...nel.org
Subject: [patch net-next 2/4] net/mlx5: Lift reload limitation when SFs are present

From: Jiri Pirko <jiri@...dia.com>

Historically, the shared devlink_mutex prevented devlink instances from
being registered/unregistered during another devlink instance reload
operation. However, devlink_muxex is gone for some time now, this
limitation is no longer needed. Lift it.

Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/devlink.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index 3d82ec890666..6eea65686c14 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -138,7 +138,6 @@ static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
 {
 	struct mlx5_core_dev *dev = devlink_priv(devlink);
 	struct pci_dev *pdev = dev->pdev;
-	bool sf_dev_allocated;
 	int ret = 0;
 
 	if (mlx5_dev_is_lightweight(dev)) {
@@ -148,16 +147,6 @@ static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
 		return 0;
 	}
 
-	sf_dev_allocated = mlx5_sf_dev_allocated(dev);
-	if (sf_dev_allocated) {
-		/* Reload results in deleting SF device which further results in
-		 * unregistering devlink instance while holding devlink_mutext.
-		 * Hence, do not support reload.
-		 */
-		NL_SET_ERR_MSG_MOD(extack, "reload is unsupported when SFs are allocated");
-		return -EOPNOTSUPP;
-	}
-
 	if (mlx5_lag_is_active(dev)) {
 		NL_SET_ERR_MSG_MOD(extack, "reload is unsupported in Lag mode");
 		return -EOPNOTSUPP;
-- 
2.41.0