s390/vfio_ccw: fix virtual vs physical address confusion

Fix virtual vs physical address confusion. This does not fix a bug
since virtual and physical address spaces are currently the same.

Reviewed-by: Eric Farman <[e-mail]>
Signed-off-by: Heiko Carstens <[e-mail]>

drivers/s390/cio/vfio_ccw_fsm.c

···
 
 	spin_lock_irq(&sch->lock);
 	sch->isc = VFIO_CCW_ISC;
-	ret = cio_enable_subchannel(sch, (u32)(unsigned long)sch);
+	ret = cio_enable_subchannel(sch, (u32)virt_to_phys(sch));
 	if (ret)
 		goto err_unlock;