shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-06 02:50:49 +09:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
[ 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:
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
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/s390/cio/device.c
View File

@@ -1367,6 +1367,7 @@ void ccw_device_set_notoper(struct ccw_device *cdev)
enum io_sch_action { enum io_sch_action {
IO_SCH_UNREG, IO_SCH_UNREG,
IO_SCH_ORPH_UNREG, IO_SCH_ORPH_UNREG,
IO_SCH_UNREG_CDEV,
IO_SCH_ATTACH, IO_SCH_ATTACH,
IO_SCH_UNREG_ATTACH, IO_SCH_UNREG_ATTACH,
IO_SCH_ORPH_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 ((sch->schib.pmcw.pam & sch->opm) == 0) {
if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK) if (ccw_device_notify(cdev, CIO_NO_PATH) != NOTIFY_OK)
return IO_SCH_UNREG; return IO_SCH_UNREG_CDEV;
return IO_SCH_DISC; return IO_SCH_DISC;
} }
if (device_is_disconnected(cdev)) 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: case IO_SCH_ORPH_ATTACH:
ccw_device_set_disconnected(cdev); ccw_device_set_disconnected(cdev);
break; break;
case IO_SCH_UNREG_CDEV:
case IO_SCH_UNREG_ATTACH: case IO_SCH_UNREG_ATTACH:
case IO_SCH_UNREG: case IO_SCH_UNREG:
if (!cdev) if (!cdev)
@@ -1494,6 +1496,7 @@ static int io_subchannel_sch_event(struct subchannel *sch, int process)
if (rc) if (rc)
goto out; goto out;
break; break;
case IO_SCH_UNREG_CDEV:
case IO_SCH_UNREG_ATTACH: case IO_SCH_UNREG_ATTACH:
spin_lock_irqsave(sch->lock, flags); spin_lock_irqsave(sch->lock, flags);
sch_set_cdev(sch, NULL); sch_set_cdev(sch, NULL);