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-rw-r--r--drivers/usb/serial/ftdi_sio.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 97f2d9c1edd6..050211afc07e 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1752,10 +1752,10 @@ static int ftdi_prepare_write_buffer(struct usb_serial_port *port,
spin_lock_irqsave(&port->lock, flags);
for (i = 0; i < size - 1; i += priv->max_packet_size) {
len = min_t(int, size - i, priv->max_packet_size) - 1;
- buffer[i] = (len << 2) + 1;
c = kfifo_out(&port->write_fifo, &buffer[i + 1], len);
if (!c)
break;
+ buffer[i] = (c << 2) + 1;
count += c + 1;
}
spin_unlock_irqrestore(&port->lock, flags);