diff options
| -rw-r--r-- | drivers/usb/serial/ir-usb.c | 63 |
1 files changed, 47 insertions, 16 deletions
diff --git a/drivers/usb/serial/ir-usb.c b/drivers/usb/serial/ir-usb.c index aaebb70..d8490ea 100644 --- a/drivers/usb/serial/ir-usb.c +++ b/drivers/usb/serial/ir-usb.c @@ -469,9 +469,23 @@ static void ir_read_bulk_callback(struct urb *urb) return; } +static void ir_set_termios_callback(struct urb *urb) +{ + struct usb_serial_port *port = urb->context; + int status = urb->status; + + dbg("%s - port %d", __func__, port->number); + + kfree(urb->transfer_buffer); + + if (status) + dbg("%s - non-zero urb status: %d", __func__, status); +} + static void ir_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { + struct urb *urb; unsigned char *transfer_buffer; int result; speed_t baud; @@ -525,35 +539,52 @@ static void ir_set_termios(struct tty_struct *tty, else ir_xbof = ir_xbof_change(xbof) ; - /* FIXME need to check to see if our write urb is busy right - * now, or use a urb pool. - * + /* Only speed changes are supported */ + tty_termios_copy_hw(tty->termios, old_termios); + tty_encode_baud_rate(tty, baud, baud); + + /* * send the baud change out on an "empty" data packet */ - transfer_buffer = port->write_urb->transfer_buffer; + urb = usb_alloc_urb(0, GFP_KERNEL); + if (!urb) { + dev_err(&port->dev, "%s - no more urbs\n", __func__); + return; + } + transfer_buffer = kmalloc(1, GFP_KERNEL); + if (!transfer_buffer) { + dev_err(&port->dev, "%s - out of memory\n", __func__); + goto err_buf; + } + *transfer_buffer = ir_xbof | ir_baud; usb_fill_bulk_urb( - port->write_urb, + urb, port->serial->dev, usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress), - port->write_urb->transfer_buffer, + transfer_buffer, 1, - ir_write_bulk_callback, + ir_set_termios_callback, port); - port->write_urb->transfer_flags = URB_ZERO_PACKET; + urb->transfer_flags = URB_ZERO_PACKET; - result = usb_submit_urb(port->write_urb, GFP_KERNEL); - if (result) - dev_err(&port->dev, - "%s - failed submitting write urb, error %d\n", - __func__, result); + result = usb_submit_urb(urb, GFP_KERNEL); + if (result) { + dev_err(&port->dev, "%s - failed to submit urb: %d\n", + __func__, result); + goto err_subm; + } - /* Only speed changes are supported */ - tty_termios_copy_hw(tty->termios, old_termios); - tty_encode_baud_rate(tty, baud, baud); + usb_free_urb(urb); + + return; +err_subm: + kfree(transfer_buffer); +err_buf: + usb_free_urb(urb); } static int __init ir_init(void) |
