vfio-ccw: Remove copy_ccw_from_iova()

Just to keep things tidy.
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Message-Id: <20190618202352.39702-6-farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

drivers/s390/cio/vfio_ccw_cp.c

@@ -228,17 +228,6 @@ static long copy_from_iova(struct device *mdev,
 	return l;
 }
 
-static long copy_ccw_from_iova(struct channel_program *cp,
-			       struct ccw1 *to, u64 iova,
-			       unsigned long len)
-{
-	int ret;
-
-	ret = copy_from_iova(cp->mdev, to, iova, len * sizeof(struct ccw1));
-
-	return ret;
-}
-
 /*
  * Helpers to operate ccwchain.
  */
@@ -435,7 +424,8 @@ static int ccwchain_handle_ccw(u32 cda, struct channel_program *cp)
 	int len;
 
 	/* Copy 2K (the most we support today) of possible CCWs */
-	len = copy_ccw_from_iova(cp, cp->guest_cp, cda, CCWCHAIN_LEN_MAX);
+	len = copy_from_iova(cp->mdev, cp->guest_cp, cda,
+			     CCWCHAIN_LEN_MAX * sizeof(struct ccw1));
 	if (len)
 		return len;