This small series fixes PV-device frontend side handling in case the
backend crashed and has come up again.

The old device will be discarded and the replacement can be used
instead.

Changes in V2:
- fixed one comment related build warning

Juergen Gross (2):
  xenbus: add xenbus_device parameter to xenbus_read_driver_state()
  xen/xenbus: better handle backend crash

 drivers/net/xen-netfront.c                 | 34 +++++++++---------
 drivers/pci/xen-pcifront.c                 |  8 ++---
 drivers/scsi/xen-scsifront.c               |  2 +-
 drivers/xen/xen-pciback/xenbus.c           | 10 +++---
 drivers/xen/xenbus/xenbus_client.c         | 17 +++++++--
 drivers/xen/xenbus/xenbus_probe.c          | 42 ++++++++++++++++++++--
 drivers/xen/xenbus/xenbus_probe_frontend.c |  2 +-
 include/xen/xenbus.h                       |  4 ++-
 8 files changed, 84 insertions(+), 35 deletions(-)

-- 
2.53.0