src/patches/suse-2.6.27.39/patches.arch/s390-15-11-cio-vary-unregister.patch

   1 From: Gerald Schaefer <geraldsc@de.ibm.com>
   2 Subject: cio: ccw devices are not removed when last path is varied offline
   3 References: bnc#518291,LTC#54951
   4
   5 Symptom:     When the last CHPID to an offline CCW device is varied offline,
   6              that device remains registered even though it is no longer
   7              accessible.
   8 Problem:     The vary command triggers an internal path verification event
   9              which is not handled for devices in the offline state.
  10 Solution:    Install a handler for the path verification event in offline state
  11              which will remove the device if it is no longer accessible.
  12
  13 Acked-by: John Jolly <jjolly@suse.de>
  14 ---
  15  drivers/s390/cio/device_fsm.c |   13 ++++++++++++-
  16  1 file changed, 12 insertions(+), 1 deletion(-)
  17
  18 Index: linux-sles11/drivers/s390/cio/device_fsm.c
  19 ===================================================================
  20 --- linux-sles11.orig/drivers/s390/cio/device_fsm.c
  21 +++ linux-sles11/drivers/s390/cio/device_fsm.c
  22 @@ -739,6 +739,17 @@ static void ccw_device_generic_notoper(s
  23  }
  24
  25  /*
  26 + * Handle path verification event in offline state.
  27 + */
  28 +static void ccw_device_offline_verify(struct ccw_device *cdev,
  29 +                                     enum dev_event dev_event)
  30 +{
  31 +       struct subchannel *sch = to_subchannel(cdev->dev.parent);
  32 +
  33 +       css_schedule_eval(sch->schid);
  34 +}
  35 +
  36 +/*
  37   * Handle path verification event.
  38   */
  39  static void
  40 @@ -1155,7 +1166,7 @@ fsm_func_t *dev_jumptable[NR_DEV_STATES]
  41                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,
  42                 [DEV_EVENT_INTERRUPT]   = ccw_device_offline_irq,
  43                 [DEV_EVENT_TIMEOUT]     = ccw_device_nop,
  44 -               [DEV_EVENT_VERIFY]      = ccw_device_nop,
  45 +               [DEV_EVENT_VERIFY]      = ccw_device_offline_verify,
  46         },
  47         [DEV_STATE_VERIFY] = {
  48                 [DEV_EVENT_NOTOPER]     = ccw_device_generic_notoper,