USB: serial: pl2303: fix TIOCGSERIAL implementation

TIOCSSERIAL is a horrid, underspecified, legacy interface which for most
serial devices is only useful for setting the close_delay and
closing_wait parameters.

The port parameter is used to set the I/O port and does not make any
sense to use for USB serial devices.

The baud_base parameter could be used to set the UART base clock when it
could not be detected but might as well be left unset when it is not
known.

The close_delay and closing_wait parameters returned by TIOCGSERIAL are
specified in centiseconds. The driver does not yet support changing
these, but let's report back the default values actually used (0.5 and
30 seconds, respectively).

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 9c0bb59688facbf812aec4adf335cbf4b15452f3..1bb870ca704481689986d43b88048f3ecf33f0a9 100644 (file)
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -1055,8 +1055,9 @@ static int pl2303_get_serial(struct tty_struct *tty,
 
        ss->type = PORT_16654;
        ss->line = port->minor;
-       ss->port = port->port_number;
-       ss->baud_base = 460800;
+       ss->close_delay = 50;
+       ss->closing_wait = 3000;
+
        return 0;
 }