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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>
This commit is contained in:
Peter Hurley 2013-06-15 09:14:13 -04:00 committed by Greg Kroah-Hartman
parent b0e9585823
commit 3b80df7ca7
1 changed files with 0 additions and 3 deletions
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3
drivers/tty/tty_ldisc.c
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@ -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);