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s390/cio: unregister device when the only path is gone
[ Upstream commit 89c0c62e94
]
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:
parent
89760f3aaf
commit
e3d7dbf093
1 changed files with 4 additions and 1 deletions
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@ -1376,6 +1376,7 @@ void ccw_device_set_notoper(struct ccw_device *cdev)
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enum io_sch_action {
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IO_SCH_UNREG,
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IO_SCH_ORPH_UNREG,
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IO_SCH_UNREG_CDEV,
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IO_SCH_ATTACH,
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IO_SCH_UNREG_ATTACH,
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IO_SCH_ORPH_ATTACH,
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@ -1408,7 +1409,7 @@ static enum io_sch_action sch_get_action(struct subchannel *sch)
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}
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if ((sch->schib.pmcw.pam & sch->opm) == 0) {
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if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK)
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return IO_SCH_UNREG;
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return IO_SCH_UNREG_CDEV;
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return IO_SCH_DISC;
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}
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if (device_is_disconnected(cdev))
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@ -1470,6 +1471,7 @@ static int io_subchannel_sch_event(struct subchannel *sch, int process)
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case IO_SCH_ORPH_ATTACH:
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ccw_device_set_disconnected(cdev);
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break;
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case IO_SCH_UNREG_CDEV:
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case IO_SCH_UNREG_ATTACH:
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case IO_SCH_UNREG:
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if (!cdev)
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@ -1503,6 +1505,7 @@ static int io_subchannel_sch_event(struct subchannel *sch, int process)
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if (rc)
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goto out;
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break;
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case IO_SCH_UNREG_CDEV:
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case IO_SCH_UNREG_ATTACH:
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spin_lock_irqsave(sch->lock, flags);
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sch_set_cdev(sch, NULL);
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