USB: ftdi_sio: fix legacy SIO-device header
Length field of header was incorrectly set to available payload space
rather than the actual payload size.
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 97f2d9c..050211a 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1752,10 +1752,10 @@
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);