Handling of devices that are unavailable when resuming

Devices that were available when the Linux instance was suspended might be unavailable when resuming.

If such unavailable devices were offline when the Linux instance was suspended, they are de-registered and the device name can be assigned to other devices.

If unavailable devices where online when the Linux instance was suspended, handling depends on the respective device driver. DASD and FCP devices remain registered as disconnected devices. The device name and the device configuration are preserved. Devices that are controlled by other device drivers are de-registered.