USB: tty: sort out the request_room handling for whiteheat

This driver has its own (surplus) backup queue system which wants removing
from the receive overflow logic.

Do this at the same time as removing the request_room logic

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 15 deletions

diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
index e89e0d589eb6..12ed8209ca72 100644
--- a/drivers/usb/serial/whiteheat.c
+++ b/drivers/usb/serial/whiteheat.c
@@ -1492,21 +1492,9 @@ static void rx_data_softint(struct work_struct *work)
                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
                 urb = wrap->urb;
 
-                if (tty && urb->actual_length) {
-                        int len = tty_buffer_request_room(tty,
-                                                        urb->actual_length);
-                        /* This stuff can go away now I suspect */
-                        if (unlikely(len < urb->actual_length)) {
-                                spin_lock_irqsave(&info->lock, flags);
-                                list_add(tmp, &info->rx_urb_q);
-                                spin_unlock_irqrestore(&info->lock, flags);
-                                tty_flip_buffer_push(tty);
-                                schedule_work(&info->rx_work);
-                                goto out;
-                        }
-                        tty_insert_flip_string(tty, urb->transfer_buffer, len);
-                        sent += len;
-                }
+                if (tty && urb->actual_length)
+                        sent += tty_insert_flip_string(tty,
+                                urb->transfer_buffer, urb->actual_length);
 
                 urb->dev = port->serial->dev;
                 result = usb_submit_urb(urb, GFP_ATOMIC);