[26/65] USB: ftdi_sio: fix TIOCSSERIAL baud_base handling

From: Greg KH
Date: Wed Feb 01 2012 - 16:50:28 EST

3.0-stable review patch. If anyone has any objections, please let me know.


From: Johan Hovold <jhovold@xxxxxxxxx>

commit eb833a9e0972f60beb4ab8104ad7ef6bf30f02fc upstream.

Return EINVAL if new baud_base does not match the current one.

The baud_base is device specific and can not be changed. This restores
the old (pre-2005) behaviour which was changed due to a
misunderstanding regarding this fact (see

Reported-by: Torbjörn Lofterud <torbjorn@xxxxxxxxx>
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/usb/serial/ftdi_sio.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1326,8 +1326,7 @@ static int set_serial_info(struct tty_st
goto check_and_exit;

- if ((new_serial.baud_base != priv->baud_base) &&
- (new_serial.baud_base < 9600)) {
+ if (new_serial.baud_base != priv->baud_base) {
return -EINVAL;

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