From: Vadim Pasternak <vadimp@nvidia.com>
Date: Thu, 11 Aug 2022 11:57:36 +0200
Subject: mlxsw: minimal: Fix deadlock in ports creation
Patch-mainline: v6.0-rc1
Git-commit: 4f98cb0408b06c4cbad8018dc7c2b4accd9d3020
References: git-fixes

Drop devl_lock() / devl_unlock() from ports creation and removal flows
since the devlink instance lock is now taken by mlxsw_core.

Fixes: 72a4c8c94efa ("mlxsw: convert driver to use unlocked devlink API during init/fini")
Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/f4afce5ab0318617f3866b85274be52542d59b32.1660211614.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlxsw/minimal.c |    7 -------
 1 file changed, 7 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlxsw/minimal.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/minimal.c
@@ -289,7 +289,6 @@ static void mlxsw_m_port_module_unmap(st
 static int mlxsw_m_ports_create(struct mlxsw_m *mlxsw_m)
 {
 	unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core);
-	struct devlink *devlink = priv_to_devlink(mlxsw_m->core);
 	u8 last_module = max_ports;
 	int i;
 	int err;
@@ -318,7 +317,6 @@ static int mlxsw_m_ports_create(struct m
 	}
 
 	/* Create port objects for each valid entry */
-	devl_lock(devlink);
 	for (i = 0; i < mlxsw_m->max_ports; i++) {
 		if (mlxsw_m->module_to_port[i] > 0 &&
 		    !mlxsw_core_port_is_xm(mlxsw_m->core, i)) {
@@ -329,7 +327,6 @@ static int mlxsw_m_ports_create(struct m
 				goto err_module_to_port_create;
 		}
 	}
-	devl_unlock(devlink);
 
 	return 0;
 
@@ -339,7 +336,6 @@ err_module_to_port_create:
 			mlxsw_m_port_remove(mlxsw_m,
 					    mlxsw_m->module_to_port[i]);
 	}
-	devl_unlock(devlink);
 	i = max_ports;
 err_module_to_port_map:
 	for (i--; i > 0; i--)
@@ -352,10 +348,8 @@ err_module_to_port_alloc:
 
 static void mlxsw_m_ports_remove(struct mlxsw_m *mlxsw_m)
 {
-	struct devlink *devlink = priv_to_devlink(mlxsw_m->core);
 	int i;
 
-	devl_lock(devlink);
 	for (i = 0; i < mlxsw_m->max_ports; i++) {
 		if (mlxsw_m->module_to_port[i] > 0) {
 			mlxsw_m_port_remove(mlxsw_m,
@@ -363,7 +357,6 @@ static void mlxsw_m_ports_remove(struct
 			mlxsw_m_port_module_unmap(mlxsw_m, i);
 		}
 	}
-	devl_unlock(devlink);
 
 	kfree(mlxsw_m->module_to_port);
 	kfree(mlxsw_m->ports);