Commit 65200c29 authored Aug 07, 2006 by Peter Oberparleiter Committed by Martin Schwidefsky Aug 07, 2006

[S390] lost interrupt after chpid vary off/on cycle.



I/O on a CCW device may stall if a channel path to that device is
logicaly varied off/on. A user I/O interrupt can get misinterpreted
as interrupt for an internal path verification operation due to a
missing check and is therefore never reported to the device driver.

Correct check for pending interruptions before starting path
verification.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent 4bc0c4f9

drivers/s390/cio/device_fsm.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -772,6 +772,7 @@ ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
		stsch(sch->schid, &sch->schib);

		if (sch->schib.scsw.actl != 0 \|\|
		(sch->schib.scsw.stctl & SCSW_STCTL_STATUS_PEND) \|\|
		(cdev->private->irb.scsw.stctl & SCSW_STCTL_STATUS_PEND)) {
		/*
		* No final status yet or final status not yet delivered