diff --git a/drivers/s390/cio/vfio_ccw_cp.c b/drivers/s390/cio/vfio_ccw_cp.c
index a7b9dfd5b464..1d4c893ead23 100644
--- a/drivers/s390/cio/vfio_ccw_cp.c
+++ b/drivers/s390/cio/vfio_ccw_cp.c
@@ -431,7 +431,7 @@ static int ccwchain_handle_ccw(u32 cda, struct channel_program *cp)
 
 	/* Convert any Format-0 CCWs to Format-1 */
 	if (!cp->orb.cmd.fmt)
-		convert_ccw0_to_ccw1(cp->guest_cp, len);
+		convert_ccw0_to_ccw1(cp->guest_cp, CCWCHAIN_LEN_MAX);
 
 	/* Count the CCWs in the current chain */
 	len = ccwchain_calc_length(cda, cp);