1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 4643212eb959..496c0c93ad81 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1406,7 +1406,7 @@ static void ftdi_write_bulk_callback (struct urb *urb)
         data_offset = priv->write_offset;
         if (data_offset > 0) {
                 /* Subtract the control bytes */
-                countback -= (data_offset * ((countback + (PKTSZ - 1)) / PKTSZ));
+                countback -= (data_offset * DIV_ROUND_UP(countback, PKTSZ));
         }
         spin_lock_irqsave(&priv->tx_lock, flags);
         --priv->tx_outstanding_urbs;
@@ -1506,7 +1506,7 @@ static void ftdi_read_bulk_callback (struct urb *urb)
 
         /* count data bytes, but not status bytes */
         countread = urb->actual_length;
-        countread -= 2 * ((countread + (PKTSZ - 1)) / PKTSZ);
+        countread -= 2 * DIV_ROUND_UP(countread, PKTSZ);
         spin_lock_irqsave(&priv->rx_lock, flags);
         priv->rx_bytes += countread;
         spin_unlock_irqrestore(&priv->rx_lock, flags);