WARNING: line over 80 characters
#23: FILE: drivers/usb/serial/ftdi_sio.c:297:
+	speed_t force_baud;	/* if non-zero, force the baud rate to this value */

ERROR: use tabs not spaces
#31: FILE: drivers/usb/serial/ftdi_sio.c:881:
+^I$

ERROR: use tabs not spaces
#39: FILE: drivers/usb/serial/ftdi_sio.c:890:
+^I$

WARNING: line over 80 characters
#111: FILE: drivers/usb/serial/ftdi_sio.c:1956:
+		tty_encode_baud_rate(port->tty, priv->force_baud, priv->force_baud);

Your patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>