tty: Don't change receive_room for ioctl(TIOCSETD)

tty_set_ldisc() is guaranteed exclusive use of the line discipline by tty_ldisc_lock_pair_timeout(); shutting off input by resetting receive_room is unnecessary. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
mariux64 · Jul 23, 2013 · 3b80df7 · 3b80df7
1 parent b0e9585
commit 3b80df7
Showing 1 changed file with 0 additions and 3 deletions.
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
@@ -540,9 +540,6 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
 		return 0;
 	}
 
-	/* FIXME: why 'shutoff' input if the ldisc is locked? */
-	tty->receive_room = 0;
-
 	old_ldisc = tty->ldisc;
 	tty_lock(tty);