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| author | Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2006-08-07 17:00:33 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-08-07 17:00:33 +0200 |
| commit | 65200c291c4ce397835d8232eaa0878b765a9bce (patch) | |
| tree | 32b6282ae63318d92c630f41a3ca6fd04e4bbbbf /drivers/s390 | |
| parent | 4bc0c4f9e74e7a5d62ef4db923b377f2aa474a8f (diff) | |
| download | linux-65200c291c4ce397835d8232eaa0878b765a9bce.tar.gz linux-65200c291c4ce397835d8232eaa0878b765a9bce.tar.bz2 linux-65200c291c4ce397835d8232eaa0878b765a9bce.zip | |
[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.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c index 7a39e0b0386c..6d91c2eb205b 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 |