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Correctly define the interface state bits in mlx5en(4).

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While at it remove unused interface state bits. This also fixes and issue
during shutdown:

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.

Linux commit:
10a8d00707082955b177164d4b4e758ffcbd4017
b3cb5388499c5e219324bfe7da2e46cbad82bfcf

MFC after:	3 days
Sponsored by:	Mellanox Technologies
This commit is contained in:
hselasky 2019-05-08 10:27:29 +00:00
parent 641eac0b61
commit 38379ab7c9
2 changed files with 2 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
sys/dev/mlx5/driver.h
View File

@ -662,9 +662,7 @@ 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,
};
enum mlx5_pci_status {

5
sys/dev/mlx5/mlx5_core/mlx5_main.c
View File

@ -1096,7 +1096,6 @@ static int mlx5_load_one(struct mlx5_core_dev *dev, struct mlx5_priv *priv,
goto err_fs;
}
clear_bit(MLX5_INTERFACE_STATE_DOWN, &dev->intf_state);
set_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state);
out:
@ -1159,7 +1158,7 @@ static int mlx5_unload_one(struct mlx5_core_dev *dev, struct mlx5_priv *priv,
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)
mlx5_cleanup_once(dev);
@ -1191,7 +1190,6 @@ static int mlx5_unload_one(struct mlx5_core_dev *dev, struct mlx5_priv *priv,
out:
clear_bit(MLX5_INTERFACE_STATE_UP, &dev->intf_state);
set_bit(MLX5_INTERFACE_STATE_DOWN, &dev->intf_state);
mutex_unlock(&dev->intf_state_mutex);
return err;
}
@ -1451,7 +1449,6 @@ static void shutdown_one(struct pci_dev *pdev)
struct mlx5_priv *priv = &dev->priv;
int err;
set_bit(MLX5_INTERFACE_STATE_SHUTDOWN, &dev->intf_state);
err = mlx5_try_fast_unload(dev);
if (err)
mlx5_unload_one(dev, priv, false);