USB: pl2303: fixed handling of CS5 setting

This patch fixes the CS5 setting on the PL2303 USB-to-serial devices. CS5 has a
value of 0 and the CSIZE setting has been skipped altogether by the enclosing
if. Tested on 3.11.6 and the scope shows the correct output after the fix has
been applied.

Tagged to be added to stable, because it fixes a user visible driver bug and is
simple enough to backport easily.

Signed-off-by: Colin Leitner <colin.leitner@gmail.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 1e6de4cd079d6a2c0e3b4b3c7679d6145bcf6f2c..1e3318dfa1cb569fcbd78ed2079ef026f33a8d16 100644 (file)
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -361,23 +361,21 @@ static void pl2303_set_termios(struct tty_struct *tty,
                            0, 0, buf, 7, 100);
        dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %7ph\n", i, buf);
 
-       if (C_CSIZE(tty)) {
-               switch (C_CSIZE(tty)) {
-               case CS5:
-                       buf[6] = 5;
-                       break;
-               case CS6:
-                       buf[6] = 6;
-                       break;
-               case CS7:
-                       buf[6] = 7;
-                       break;
-               default:
-               case CS8:
-                       buf[6] = 8;
-               }
-               dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
+       switch (C_CSIZE(tty)) {
+       case CS5:
+               buf[6] = 5;
+               break;
+       case CS6:
+               buf[6] = 6;
+               break;
+       case CS7:
+               buf[6] = 7;
+               break;
+       default:
+       case CS8:
+               buf[6] = 8;
        }
+       dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
 
        /* For reference buf[0]:buf[3] baud rate value */
        pl2303_encode_baudrate(tty, port, &buf[0]);