From 33afbfcc105a572159750f2ebee834a8a70fdd96 Mon Sep 17 00:00:00 2001 From: Moshe Shemesh Date: Tue, 4 Jun 2024 00:04:42 +0300 Subject: [PATCH] net/mlx5: Stop waiting for PCI if pci channel is offline 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 Reviewed-by: Shay Drori Signed-off-by: Tariq Toukan Signed-off-by: David S. Miller --- 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 2d95a9b7b44e1..b61b7d9661141 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_INITIAL_SEG_NIC_INTERFACE_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 ad38e31822df1..a6329ca2d9bff 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_INITIAL_SEG_NIC_INTERFACE_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);