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[S390] cio: make disconnected handling consistent 

When there is no path left to a ccw device, inform the associated
device driver and act according to the response: if the driver
wants to keep the device, put it into the disconnected state.
If not, or if there is no driver or if the device is not online,
unregister it.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Peter Oberparleiter 2009-10-06 10:34:01 +02:00 committed by Martin Schwidefsky
parent 05d419b11f
commit 9a33211694
1 changed files with 17 additions and 3 deletions
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20
drivers/s390/cio/device_fsm.c
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@ -387,19 +387,33 @@ ccw_device_done(struct ccw_device *cdev, int state)
cdev->private->state = state;
if (state == DEV_STATE_BOXED) {
switch (state) {
case DEV_STATE_BOXED:
CIO_MSG_EVENT(0, "Boxed device %04x on subchannel %04x\n",
cdev->private->dev_id.devno, sch->schid.sch_no);
if (cdev->online && !ccw_device_notify(cdev, CIO_BOXED))
ccw_device_schedule_sch_unregister(cdev);
cdev->private->flags.donotify = 0;
}
if (state == DEV_STATE_NOT_OPER) {
break;
case DEV_STATE_NOT_OPER:
CIO_MSG_EVENT(0, "Device %04x gone on subchannel %04x\n",
cdev->private->dev_id.devno, sch->schid.sch_no);
if (!ccw_device_notify(cdev, CIO_GONE))
ccw_device_schedule_sch_unregister(cdev);
cdev->private->flags.donotify = 0;
break;
case DEV_STATE_DISCONNECTED:
CIO_MSG_EVENT(0, "Disconnected device %04x on subchannel "
"%04x\n", cdev->private->dev_id.devno,
sch->schid.sch_no);
if (!ccw_device_notify(cdev, CIO_NO_PATH))
ccw_device_schedule_sch_unregister(cdev);
else
ccw_device_set_disconnected(cdev);
cdev->private->flags.donotify = 0;
break;
default:
break;
}
if (cdev->private->flags.donotify) {