net/mlx5: Stop waiting for PCI up if teardown was triggered

[ Upstream commit 8ff38e7 ]

If driver teardown is called while PCI is turned off, there is a race
between health recovery and teardown. If health recovery already started
it will wait 60 sec trying to see if PCI gets back and it can recover,
but actually there is no need to wait anymore once teardown was called.

Use the MLX5_BREAK_FW_WAIT flag which is set on driver teardown to break
waiting for PCI up.

Signed-off-by: Moshe Shemesh <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Stable-dep-of: 33afbfc ("net/mlx5: Stop waiting for PCI if pci channel is offline")
Signed-off-by: Sasha Levin <[email protected]>

Author: Moshe Shemesh

drivers/net/ethernet/mellanox/mlx5/core/health.c

@@ -325,6 +325,10 @@ int mlx5_health_wait_pci_up(struct mlx5_core_dev *dev)
 	while (sensor_pci_not_working(dev)) {
 		if (time_after(jiffies, end))
 			return -ETIMEDOUT;
+		if (test_bit(MLX5_BREAK_FW_WAIT, &dev->intf_state)) {
+			mlx5_core_warn(dev, "device is being removed, stop waiting for PCI\n");
+			return -ENODEV;
+		}
 		msleep(100);
 	}
 	return 0;