-#define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */
-
-static int klsi_105_write(struct tty_struct *tty,
- struct usb_serial_port *port, const unsigned char *buf, int count)
-{
- struct klsi_105_private *priv = usb_get_serial_port_data(port);
- int result, size;
- int bytes_sent = 0;
-
- dbg("%s - port %d", __func__, port->number);
-
- while (count > 0) {
- /* try to find a free urb (write 0 bytes if none) */
- struct urb *urb = NULL;
- unsigned long flags;
- int i;
- /* since the pool is per-port we might not need
- the spin lock !? */
- spin_lock_irqsave(&priv->lock, flags);
- for (i = 0; i < NUM_URBS; i++) {
- if (priv->write_urb_pool[i]->status != -EINPROGRESS) {
- urb = priv->write_urb_pool[i];
- dbg("%s - using pool URB %d", __func__, i);
- break;
- }
- }
- spin_unlock_irqrestore(&priv->lock, flags);
-
- if (urb == NULL) {
- dbg("%s - no more free urbs", __func__);
- goto exit;
- }
-
- if (urb->transfer_buffer == NULL) {
- urb->transfer_buffer =
- kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
- if (urb->transfer_buffer == NULL) {
- dev_err(&port->dev,
- "%s - no more kernel memory...\n",
- __func__);
- goto exit;
- }
- }
-
- size = min(count, port->bulk_out_size - KLSI_105_DATA_OFFSET);
- size = min(size, URB_TRANSFER_BUFFER_SIZE -
- KLSI_105_DATA_OFFSET);
-
- memcpy(urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size);
-
- /* write payload size into transfer buffer */
- ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF);
- ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8);
-
- /* set up our urb */
- usb_fill_bulk_urb(urb, port->serial->dev,
- usb_sndbulkpipe(port->serial->dev,
- port->bulk_out_endpointAddress),
- urb->transfer_buffer,
- URB_TRANSFER_BUFFER_SIZE,
- klsi_105_write_bulk_callback,
- port);
-
- /* send the data out the bulk port */
- result = usb_submit_urb(urb, GFP_ATOMIC);
- if (result) {
- dev_err(&port->dev,
- "%s - failed submitting write urb, error %d\n",
- __func__, result);
- goto exit;
- }
- buf += size;
- bytes_sent += size;
- count -= size;
- }
-exit:
- /* lockless, but it's for debug info only... */
- priv->bytes_out += bytes_sent;
-
- return bytes_sent; /* that's how much we wrote */
-}
-
-static void klsi_105_write_bulk_callback(struct urb *urb)