[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>

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