pty, n_tty: Simplify input processing on final close

[deliverable/linux.git] / drivers / tty / n_tty.c

diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 0cb0e12f87c741975b975df3bd856446b82fd465..112eda7c56bc816431a3031bfd8fb08e982299b4 100644 (file)
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -2197,34 +2197,28 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
 
                if (!input_available_p(tty, 0)) {
                        if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) {
-                               up_read(&tty->termios_rwsem);
-                               tty_flush_to_ldisc(tty);
-                               down_read(&tty->termios_rwsem);
-                               if (!input_available_p(tty, 0)) {
-                                       retval = -EIO;
-                                       break;
-                               }
-                       } else {
-                               if (tty_hung_up_p(file))
-                                       break;
-                               if (!timeout)
-                                       break;
-                               if (file->f_flags & O_NONBLOCK) {
-                                       retval = -EAGAIN;
-                                       break;
-                               }
-                               if (signal_pending(current)) {
-                                       retval = -ERESTARTSYS;
-                                       break;
-                               }
-                               n_tty_set_room(tty);
-                               up_read(&tty->termios_rwsem);
+                               retval = -EIO;
+                               break;
+                       }
+                       if (tty_hung_up_p(file))
+                               break;
+                       if (!timeout)
+                               break;
+                       if (file->f_flags & O_NONBLOCK) {
+                               retval = -EAGAIN;
+                               break;
+                       }
+                       if (signal_pending(current)) {
+                               retval = -ERESTARTSYS;
+                               break;
+                       }
+                       n_tty_set_room(tty);
+                       up_read(&tty->termios_rwsem);
 
-                               timeout = schedule_timeout(timeout);
+                       timeout = schedule_timeout(timeout);
 
-                               down_read(&tty->termios_rwsem);
-                               continue;
-                       }
+                       down_read(&tty->termios_rwsem);
+                       continue;
                }
                __set_current_state(TASK_RUNNING);