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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2007-10-18 01:24:18 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2007-10-25 12:18:40 -0700
commit73f593081911b1be0d8d3962ecedd635c1e27179 (patch)
tree2f42500419d9ed6bd39d60168f3b2b5035784682 /drivers/usb
parent7cc7ee28263e89793ae4d21e6e0102404c9a037b (diff)
USB: ch341: fix termios handling
The ch341 currently doesn't support most of the hardware setting. So to keep the termios data right we propogate the old termios hardware values back then encode the speed. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/serial/ch341.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 6b252ceb39a..42582d49b69 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -272,9 +272,6 @@ static void ch341_set_termios(struct usb_serial_port *port,
dbg("ch341_set_termios()");
- if (!tty || !tty->termios)
- return;
-
baud_rate = tty_get_baud_rate(tty);
switch (baud_rate) {
@@ -299,6 +296,11 @@ static void ch341_set_termios(struct usb_serial_port *port,
* (cflag & PARENB) : parity {NONE, EVEN, ODD}
* (cflag & CSTOPB) : stop bits [1, 2]
*/
+
+ /* Copy back the old hardware settings */
+ tty_termios_copy_hw(tty->termios, old_termios);
+ /* And re-encode with the new baud */
+ tty_encode_baud_rate(tty, baud_rate, baud_rate);
}
static struct usb_driver ch341_driver = {