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s390/cio: unregister device when the only path is gone

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[ Upstream commit 89c0c62e947a01e7a36b54582fd9c9e346170255 ]

Currently, if the device is offline and all the channel paths are
either configured or varied offline, the associated subchannel gets
unregistered. Don't unregister the subchannel, instead unregister
offline device.

Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Vineeth Vijayan 2023-05-04 20:53:20 +02:00 committed by Greg Kroah-Hartman
parent 552a24eb71
commit 39a77f005f
1 changed files with 4 additions and 1 deletions
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5
drivers/s390/cio/device.c
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@ -1367,6 +1367,7 @@ void ccw_device_set_notoper(struct ccw_device *cdev)
enum io_sch_action {
IO_SCH_UNREG,
IO_SCH_ORPH_UNREG,
IO_SCH_UNREG_CDEV,
IO_SCH_ATTACH,
IO_SCH_UNREG_ATTACH,
IO_SCH_ORPH_ATTACH,
@ -1399,7 +1400,7 @@ static enum io_sch_action sch_get_action(struct subchannel *sch)
}
if ((sch->schib.pmcw.pam & sch->opm) == 0) {
if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK)
return IO_SCH_UNREG;
return IO_SCH_UNREG_CDEV;
return IO_SCH_DISC;
}
if (device_is_disconnected(cdev))
@ -1461,6 +1462,7 @@ static int io_subchannel_sch_event(struct subchannel *sch, int process)
case IO_SCH_ORPH_ATTACH:
ccw_device_set_disconnected(cdev);
break;
case IO_SCH_UNREG_CDEV:
case IO_SCH_UNREG_ATTACH:
case IO_SCH_UNREG:
if (!cdev)
@ -1494,6 +1496,7 @@ static int io_subchannel_sch_event(struct subchannel *sch, int process)
if (rc)
goto out;
break;
case IO_SCH_UNREG_CDEV:
case IO_SCH_UNREG_ATTACH:
spin_lock_irqsave(sch->lock, flags);
sch_set_cdev(sch, NULL);