From: Huy Nguyen <huyn@mellanox.com>
Date: Tue, 8 Aug 2017 13:17:00 -0500
Subject: net/mlx5: Skip mlx5_unload_one if mlx5_load_one fails
Patch-mainline: v4.13
Git-commit: b3cb5388499c5e219324bfe7da2e46cbad82bfcf
References: bsc#1046303 FATE#322944
There is an issue where the firmware fails during mlx5_load_one,
the health_care timer detects the issue and schedules a health_care call.
Then the mlx5_load_one detects the issue, cleans up and quits. Then
the health_care starts and calls mlx5_unload_one to clean up the resources
that no longer exist and causes kernel panic.
The root cause is that the bit MLX5_INTERFACE_STATE_DOWN is not set
after mlx5_load_one fails. The solution is removing the bit
MLX5_INTERFACE_STATE_DOWN and quit mlx5_unload_one if the
bit MLX5_INTERFACE_STATE_UP is not set. The bit MLX5_INTERFACE_STATE_DOWN
is redundant and we can use MLX5_INTERFACE_STATE_UP instead.
Fixes: 5fc7197d3a25 ("net/mlx5: Add pci shutdown callback")
Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Reviewed-by: Daniel Jurgens <danielj@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/mellanox/mlx5/core/main.c | 4 +---
include/linux/mlx5/driver.h | 5 ++---
2 files changed, 3 insertions(+), 6 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx5/core/main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c
@@ -1186,7 +1186,6 @@ static int mlx5_load_one(struct mlx5_cor
}
}
- clear_bit(MLX5_INTERFACE_STATE_DOWN, &dev->intf_state);
set_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state);
out:
mutex_unlock(&dev->intf_state_mutex);
@@ -1261,7 +1260,7 @@ static int mlx5_unload_one(struct mlx5_c
mlx5_drain_health_recovery(dev);
mutex_lock(&dev->intf_state_mutex);
- if (test_bit(MLX5_INTERFACE_STATE_DOWN, &dev->intf_state)) {
+ if (!test_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state)) {
dev_warn(&dev->pdev->dev, "%s: interface is down, NOP\n",
__func__);
if (cleanup)
@@ -1270,7 +1269,6 @@ static int mlx5_unload_one(struct mlx5_c
}
clear_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state);
- set_bit(MLX5_INTERFACE_STATE_DOWN, &dev->intf_state);
if (mlx5_device_registered(dev))
mlx5_detach_device(dev);
--- a/include/linux/mlx5/driver.h
+++ b/include/linux/mlx5/driver.h
@@ -673,9 +673,8 @@ enum mlx5_device_state {
};
enum mlx5_interface_state {
- MLX5_INTERFACE_STATE_DOWN = BIT(0),
- MLX5_INTERFACE_STATE_UP = BIT(1),
- MLX5_INTERFACE_STATE_SHUTDOWN = BIT(2),
+ MLX5_INTERFACE_STATE_UP = BIT(0),
+ MLX5_INTERFACE_STATE_SHUTDOWN = BIT(1),
};
enum mlx5_pci_status {