[S390] Add timeouts during sense PGID, path verification and disband PGID.

While the machine owns us an interrupt in these cases (and we should get
one), reality isn't always like that...

Signed-off-by: Cornelia Huck <[e-mail]>
Signed-off-by: Martin Schwidefsky <[e-mail]>

drivers/s390/cio/device_fsm.c

···
 
 	sch = to_subchannel(cdev->dev.parent);
 
+	ccw_device_set_timeout(cdev, 0);
+
 	if (state != DEV_STATE_ONLINE)
 		cio_disable_subchannel(sch);
 

drivers/s390/cio/device_ops.c

···
 	      (stctl & SCSW_STCTL_PRIM_STATUS)))
 		return 0;
 
+	/* Clear pending timers for device driver initiated I/O. */
+	if (ending_status)
+		ccw_device_set_timeout(cdev, 0);
 	/*
 	 * Now we are ready to call the device driver interrupt handler.
 	 */

drivers/s390/cio/device_pgid.c

···
 {
 	int ret;
 
+	/* Set a timeout of 60s */
+	ccw_device_set_timeout(cdev, 60*HZ);
+
 	cdev->private->state = DEV_STATE_SENSE_PGID;
 	cdev->private->imask = 0x80;
 	cdev->private->iretry = 5;
···
 		ccw_device_verify_done(cdev, -ENODEV);
 		return;
 	}
+	/* After 60s path verification is considered to have failed. */
+	ccw_device_set_timeout(cdev, 60*HZ);
 	__ccw_device_verify_start(cdev);
 }
 
···
 void
 ccw_device_disband_start(struct ccw_device *cdev)
 {
+	/* After 60s disbanding is considered to have failed. */
+	ccw_device_set_timeout(cdev, 60*HZ);
+
 	cdev->private->flags.pgid_single = 0;
 	cdev->private->iretry = 5;
 	cdev->private->imask = 0x80;