6.6-stable review patch. If anyone has any objections, please let me know.
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From: Moshe Shemesh moshe@nvidia.com
[ 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 --- drivers/net/ethernet/mellanox/mlx5/core/fw.c | 4 ++++ drivers/net/ethernet/mellanox/mlx5/core/health.c | 8 ++++++++ drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.c | 4 ++++ 3 files changed, 16 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw.c b/drivers/net/ethernet/mellanox/mlx5/core/fw.c index 58f4c0d0fafa2..70898f0a9866c 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/fw.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/fw.c @@ -373,6 +373,10 @@ 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)); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/health.c b/drivers/net/ethernet/mellanox/mlx5/core/health.c index 2fb2598b775ef..d798834c4e755 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/health.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/health.c @@ -248,6 +248,10 @@ void mlx5_error_sw_reset(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"); + goto unlock; + }
msleep(20); } while (!time_after(jiffies, end)); @@ -317,6 +321,10 @@ int mlx5_health_wait_pci_up(struct mlx5_core_dev *dev) mlx5_core_warn(dev, "device is being removed, stop waiting for PCI\n"); return -ENODEV; } + if (pci_channel_offline(dev->pdev)) { + mlx5_core_err(dev, "PCI channel offline, stop waiting for PCI\n"); + return -EACCES; + } msleep(100); } return 0; diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.c index 6b774e0c27665..d0b595ba61101 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/pci_vsc.c @@ -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);