On Sat, 8 Apr 2006, Paul Fulghum wrote:
> On Sat, 2006-04-08 at 21:34 +0200, Guennadi Liakhovetski wrote:
> > On Fri, 7 Apr 2006, Paul Fulghum wrote:
> > It hung exactly as with the previous big one. Don't think it is important,
> > I am testing it on a SMP.
>
> OK, this one backs out my usb_console_setup change
> that uses the temp tty structure for the device specific open.
>
> Included is:
> * improved usb serial_open fix (fix ENODEV)
> * improved usb_console_write fix (fix CR after LF)
> * your original ftdi patch (fix oops on tty struct == NULL)
Yes, this one works.
Guennadi
>
>
> --- a/drivers/usb/serial/console.c 2006-03-19 23:53:29.000000000 -0600
> +++ b/drivers/usb/serial/console.c 2006-04-08 15:43:15.000000000 -0500
> @@ -213,17 +213,38 @@ static void usb_console_write(struct con
>
> if (!port->open_count) {
> dbg ("%s - port not opened", __FUNCTION__);
> - goto exit;
> + return;
> }
>
> - /* pass on to the driver specific version of this function if it is
> available */
> - if (serial->type->write)
> - retval = serial->type->write(port, buf, count);
> - else
> - retval = usb_serial_generic_write(port, buf, count);
> -
> -exit:
> - dbg("%s - return value (if we had one): %d", __FUNCTION__, retval);
> + while (count) {
> + unsigned int i;
> + unsigned int lf;
> + /* search for LF so we can insert CR if necessary */
> + for (i=0, lf=0 ; i < count ; i++) {
> + if (*(buf + i) == 10) {
> + lf = 1;
> + i++;
> + break;
> + }
> + }
> + /* pass on to the driver specific version of this function if
> it is available */
> + if (serial->type->write)
> + retval = serial->type->write(port, buf, i);
> + else
> + retval = usb_serial_generic_write(port, buf, i);
> + dbg("%s - return value : %d", __FUNCTION__, retval);
> + if (lf) {
> + /* append CR after LF */
> + unsigned char cr = 13;
> + if (serial->type->write)
> + retval = serial->type->write(port, &cr, 1);
> + else
> + retval = usb_serial_generic_write(port, &cr, 1);
> + dbg("%s - return value : %d", __FUNCTION__, retval);
> + }
> + buf += i;
> + count -= i;
> + }
> }
>
> static struct console usbcons = {
> --- a/drivers/usb/serial/usb-serial.c 2006-03-19 23:53:29.000000000 -0600
> +++ b/drivers/usb/serial/usb-serial.c 2006-04-08 15:34:11.000000000 -0500
> @@ -197,12 +197,12 @@ static int serial_open (struct tty_struc
>
> ++port->open_count;
>
> - if (port->open_count == 1) {
> + /* set up our port structure making the tty driver
> + * remember our port object, and us it */
> + tty->driver_data = port;
> + port->tty = tty;
>
> - /* set up our port structure making the tty driver
> - * remember our port object, and us it */
> - tty->driver_data = port;
> - port->tty = tty;
> + if (port->open_count == 1) {
>
> /* lock this module before we call it
> * this may fail, which means we must bail out,
> --- a/drivers/usb/serial/ftdi_sio.c 2006-03-19 23:53:29.000000000 -0600
> +++ b/drivers/usb/serial/ftdi_sio.c 2006-04-08 15:47:21.000000000 -0500
> @@ -1264,8 +1264,8 @@ static int ftdi_open (struct usb_serial
>
> dbg("%s", __FUNCTION__);
>
> -
> - port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
> + if (port->tty)
> + port->tty->low_latency = (priv->flags & ASYNC_LOW_LATENCY) ? 1
> : 0;
>
> /* No error checking for this (will get errors later anyway) */
> /* See ftdi_sio.h for description of what is reset */
> @@ -1279,7 +1279,8 @@ static int ftdi_open (struct usb_serial
> This is same behaviour as serial.c/rs_open() - Kuba */
>
> /* ftdi_set_termios will send usb control messages */
> - ftdi_set_termios(port, &tmp_termios);
> + if (port->tty)
> + ftdi_set_termios(port, &tmp_termios);
>
> /* FIXME: Flow control might be enabled, so it should be checked -
> we have no control of defaults! */
> @@ -1860,7 +1861,7 @@ static void ftdi_set_termios (struct usb
> err("%s urb failed to set baudrate", __FUNCTION__);
> }
> /* Ensure RTS and DTR are raised when baudrate changed from 0 */
> - if ((old_termios->c_cflag & CBAUD) == B0) {
> + if (!old_termios || (old_termios->c_cflag & CBAUD) == B0) {
> set_mctrl(port, TIOCM_DTR | TIOCM_RTS);
> }
> }
>
>
---
Guennadi Liakhovetski
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