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authorPeter Oberparleiter <peter.oberparleiter@de.ibm.com>2006-08-07 17:00:33 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-08-07 17:00:33 +0200
commit65200c291c4ce397835d8232eaa0878b765a9bce (patch)
tree32b6282ae63318d92c630f41a3ca6fd04e4bbbbf /drivers/s390
parent4bc0c4f9e74e7a5d62ef4db923b377f2aa474a8f (diff)
downloadop-kernel-dev-65200c291c4ce397835d8232eaa0878b765a9bce.zip
op-kernel-dev-65200c291c4ce397835d8232eaa0878b765a9bce.tar.gz
[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>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/cio/device_fsm.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index 7a39e0b..6d91c2e 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -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
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