[S390] cio: improve unit check handling for internal operations

Retry internal operation after unit check instead of aborting them.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/cio/device_ops.c

@@ -288,7 +288,7 @@ ccw_device_wake_up(struct ccw_device *cdev, unsigned long ip, struct irb *irb)
 		 if (cdev->private->flags.doverify ||
 			 cdev->private->state == DEV_STATE_VERIFY)
 			 cdev->private->intparm = -EAGAIN;
-		 if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
+		else if ((irb->scsw.dstat & DEV_STAT_UNIT_CHECK) &&
 			 !(irb->ecw[0] &
 			   (SNS0_CMD_REJECT | SNS0_INTERVENTION_REQ)))
 			cdev->private->intparm = -EAGAIN;