IB/mlx5: Disable BME for unbound devices too

Commit e51fa3d057e5 ("IB/mlx5: Disable BME on panic") disables PCI Bus
Master Enable for devices when the kernel panics, by traversing the
mlx5 IB driver's dev_list. However, when a device is unbound, the
device is removed from said list and moved to an unaffiliated list.

Therefore, we will also traverse the unaffiliated list in addition to
the dev_list in order to make sure all VFs are silenced.

Orabug: 34395378

Fixes: e51fa3d057e5 ("IB/mlx5: Disable BME on panic")
Signed-off-by: Håkon Bugge <[email protected]>
Tested-by: Aiman Al-Khammash <[email protected]>
Reviewed-by: Konrad Rzeszutek Wilk <[email protected]>
Signed-off-by: Saeed Mirzamohammadi <[email protected]>

Author: Hakon-Bugge

drivers/infiniband/hw/mlx5/main.c

@@ -3637,6 +3637,7 @@ static int mlx5_ib_panic_handler(struct notifier_block *nb,
 				 unsigned long action, void *unused)
 {
 	struct mlx5_ib_dev *dev;
+	struct mlx5_ib_multiport_info *mpi;
 
 	list_for_each_entry(dev, &mlx5_ib_dev_list, ib_dev_list) {
 		struct pci_dev *pdev = dev->mdev->pdev;
@@ -3645,6 +3646,14 @@ static int mlx5_ib_panic_handler(struct notifier_block *nb,
 		pci_clear_master(pdev);
 	}
 
+	/* Unbound devices are moved to the unaffiliated list */
+	list_for_each_entry(mpi, &mlx5_ib_unaffiliated_port_list, list) {
+		struct pci_dev *pdev = mpi->mdev->pdev;
+
+		pci_crit(pdev, "Revoke Bus_Mastership_Enable (BME) for unbound device\n");
+		pci_clear_master(pdev);
+	}
+
 	return NOTIFY_DONE;
 }