5.0-stable patches

[thirdparty/kernel/stable-queue.git] / queue-5.0 / mlxsw-core-do-not-use-wq_mem_reclaim-for-emad-workqueue.patch

From foo@baz Sat Apr 20 16:43:09 CEST 2019
From: Ido Schimmel <idosch@mellanox.com>
Date: Wed, 10 Apr 2019 06:58:13 +0000
Subject: mlxsw: core: Do not use WQ_MEM_RECLAIM for EMAD workqueue

From: Ido Schimmel <idosch@mellanox.com>

[ Upstream commit a8c133b06183c529c51cd0d54eb57d6b7078370c ]

The EMAD workqueue is used to handle retransmission of EMAD packets that
contain configuration data for the device's firmware.

Given the workers need to allocate these packets and that the code is
not called as part of memory reclaim path, remove the WQ_MEM_RECLAIM
flag.

Fixes: d965465b60ba ("mlxsw: core: Fix possible deadlock")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/ethernet/mellanox/mlxsw/core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -568,7 +568,7 @@ static int mlxsw_emad_init(struct mlxsw_
 	if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX))
 		return 0;
 
-	emad_wq = alloc_workqueue("mlxsw_core_emad", WQ_MEM_RECLAIM, 0);
+	emad_wq = alloc_workqueue("mlxsw_core_emad", 0, 0);
 	if (!emad_wq)
 		return -ENOMEM;
 	mlxsw_core->emad_wq = emad_wq;