linux-kernel - [PATCH AUTOSEL for 4.14 043/110] net/mlx5: Stay in polling mode when command EQ destroy fails

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Date:   Sat, 3 Feb 2018 18:00:49 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     Moshe Shemesh <moshe@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.14 043/110] net/mlx5: Stay in polling mode when
 command EQ destroy fails

From: Moshe Shemesh <moshe@...lanox.com>

[ Upstream commit a2fba188fd5eadd6061bef4f2f2577a43231ebf3 ]

During unload, on mlx5_stop_eqs we move command interface from events
mode to polling mode, but if command interface EQ destroy fail we move
back to events mode.
That's wrong since even if we fail to destroy command interface EQ, we
do release its irq, so no interrupts will be received.

Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters")
Signed-off-by: Moshe Shemesh <moshe@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/eq.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eq.c b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
index 494726f02e3e..eb91de86202b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eq.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eq.c
@@ -802,11 +802,9 @@ void mlx5_stop_eqs(struct mlx5_core_dev *dev)
 	mlx5_cmd_use_polling(dev);
 
 	err = mlx5_destroy_unmap_eq(dev, &table->cmd_eq);
-	if (err) {
+	if (err)
 		mlx5_core_err(dev, "failed to destroy command eq, err(%d)\n",
 			      err);
-		mlx5_cmd_use_events(dev);
-	}
 }
 
 int mlx5_core_eq_query(struct mlx5_core_dev *dev, struct mlx5_eq *eq,
-- 
2.11.0