提交 52856ed7 编写于 作者: A Alan Cox 提交者: Linus Torvalds

ldisc: Make sure the ldisc isn't active when we close it

Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 8d2ead74
......@@ -793,6 +793,8 @@ void tty_ldisc_hangup(struct tty_struct *tty)
/* Avoid racing set_ldisc */
mutex_lock(&tty->ldisc_mutex);
/* Switch back to N_TTY */
tty_ldisc_halt(tty);
tty_ldisc_wait_idle(tty);
tty_ldisc_reinit(tty);
/* At this point we have a closed ldisc and we want to
reopen it. We could defer this to the next open but
......
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