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net/mlx5: Stop waiting for PCI if pci channel is offline

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[ Upstream commit 33afbfcc105a572159750f2ebee834a8a70fdd96 ]

In case pci channel becomes offline the driver should not wait for PCI
reads during health dump and recovery flow. The driver has timeout for
each of these loops trying to read PCI, so it would fail anyway.
However, in case of recovery waiting till timeout may cause the pci
error_detected() callback fail to meet pci_dpc_recovered() wait timeout.

Fixes: b3bd076f7501 ("net/mlx5: Report devlink health on FW fatal issues")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Shay Drori <shayd@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Moshe Shemesh 2024-06-04 00:04:42 +03:00 committed by Greg Kroah-Hartman
parent b2ca635b82
commit a0a0a84d9a
3 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/ethernet/mellanox/mlx5/core/fw.c
View File

@ -337,6 +337,10 @@ int mlx5_cmd_fast_teardown_hca(struct mlx5_core_dev *dev)
do {
if (mlx5_get_nic_state(dev) == MLX5_NIC_IFC_DISABLED)
break;
if (pci_channel_offline(dev->pdev)) {
mlx5_core_err(dev, "PCI channel offline, stop waiting for NIC IFC\n");
return -EACCES;
}
cond_resched();
} while (!time_after(jiffies, end));

8
drivers/net/ethernet/mellanox/mlx5/core/health.c
View File

@ -250,6 +250,10 @@ recover_from_sw_reset:
do {
if (mlx5_get_nic_state(dev) == MLX5_NIC_IFC_DISABLED)
break;
if (pci_channel_offline(dev->pdev)) {
mlx5_core_err(dev, "PCI channel offline, stop waiting for NIC IFC\n");
goto unlock;
}
msleep(20);
} while (!time_after(jiffies, end));
@ -322,6 +326,10 @@ static int mlx5_health_try_recover(struct mlx5_core_dev *dev)
"health recovery flow aborted, PCI reads still not working\n");
return -EIO;
}
if (pci_channel_offline(dev->pdev)) {
mlx5_core_err(dev, "PCI channel offline, stop waiting for PCI\n");
return -EACCES;
}
msleep(100);
}

4
drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.c
View File

@ -74,6 +74,10 @@ int mlx5_vsc_gw_lock(struct mlx5_core_dev *dev)
ret = -EBUSY;
goto pci_unlock;
}
if (pci_channel_offline(dev->pdev)) {
ret = -EACCES;
goto pci_unlock;
}
/* Check if semaphore is already locked */
ret = vsc_read(dev, VSC_SEMAPHORE_OFFSET, &lock_val);