drm: allow multiple addMaps with the same 32-bit map offsset.

[linux-2.6-omap-h63xx.git] / drivers / char / n_tty.c

diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index ede365d05387087ba4110a9f97fc74ba6c1971ef..603b9ade5eb089f16f041fc15e4876417a6c1505 100644 (file)
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -1132,7 +1132,7 @@ static inline int input_available_p(struct tty_struct *tty, int amt)
  *     buffer, and once to drain the space from the (physical) beginning of
  *     the buffer to head pointer.
  *
- *     Called under the tty->atomic_read_lock sem and with TTY_DONT_FLIP set
+ *     Called under the tty->atomic_read_lock sem
  *
  */
  
@@ -1271,7 +1271,6 @@ do_it_again:
        }
 
        add_wait_queue(&tty->read_wait, &wait);
-       set_bit(TTY_DONT_FLIP, &tty->flags);
        while (nr) {
                /* First test for status change. */
                if (tty->packet && tty->link->ctrl_status) {
@@ -1315,9 +1314,7 @@ do_it_again:
                                break;
                        }
                        n_tty_set_room(tty);
-                       clear_bit(TTY_DONT_FLIP, &tty->flags);
                        timeout = schedule_timeout(timeout);
-                       set_bit(TTY_DONT_FLIP, &tty->flags);
                        continue;
                }
                __set_current_state(TASK_RUNNING);
@@ -1384,15 +1381,16 @@ do_it_again:
                 * longer than TTY_THRESHOLD_UNTHROTTLE in canonical mode,
                 * we won't get any more characters.
                 */
-               if (n_tty_chars_in_buffer(tty) <= TTY_THRESHOLD_UNTHROTTLE)
+               if (n_tty_chars_in_buffer(tty) <= TTY_THRESHOLD_UNTHROTTLE) {
+                       n_tty_set_room(tty);
                        check_unthrottle(tty);
+               }
 
                if (b - buf >= minimum)
                        break;
                if (time)
                        timeout = time;
        }
-       clear_bit(TTY_DONT_FLIP, &tty->flags);
        mutex_unlock(&tty->atomic_read_lock);
        remove_wait_queue(&tty->read_wait, &wait);