[S390] cio: add timeout handler for internal operations.

Add timeout handler for common-I/O-layer-internal I/O operations.

Signed-off-by: Peter Oberparleiter <[e-mail]>
Signed-off-by: Martin Schwidefsky <[e-mail]>

drivers/s390/cio/device_ops.c

···
 
 	sch = to_subchannel(cdev->dev.parent);
 	do {
+		ccw_device_set_timeout(cdev, 60 * HZ);
 		ret = cio_start (sch, ccw, lpm);
+		if (ret != 0)
+			ccw_device_set_timeout(cdev, 0);
 		if (ret == -EBUSY) {
 			/* Try again later. */
 			spin_unlock_irq(&sch->lock);