[PATCH] TTY layer buffering revamp

[pandora-kernel.git] / drivers / usb / serial / ftdi_sio.c

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index eb863b3..10bc1bf 100644 (file)
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1610,24 +1610,11 @@ static void ftdi_process_read (void *param)
                        length = 0;
                }
 
-               /* have to make sure we don't overflow the buffer
-                  with tty_insert_flip_char's */
-               if (tty->flip.count+length > TTY_FLIPBUF_SIZE) {
-                       tty_flip_buffer_push(tty);
-                       need_flip = 0;
-
-                       if (tty->flip.count != 0) {
-                               /* flip didn't work, this happens when ftdi_process_read() is
-                                * called from ftdi_unthrottle, because TTY_DONT_FLIP is set */
-                               dbg("%s - flip buffer push failed", __FUNCTION__);
-                               break;
-                       }
-               }
                if (priv->rx_flags & THROTTLED) {
                        dbg("%s - throttled", __FUNCTION__);
                        break;
                }
-               if (tty->ldisc.receive_room(tty)-tty->flip.count < length) {
+               if (tty_buffer_request_room(tty, length) < length) {
                        /* break out & wait for throttling/unthrottling to happen */
                        dbg("%s - receive room low", __FUNCTION__);
                        break;