diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2014-11-05 12:40:05 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-06 14:57:27 -0800 |
| commit | 3f40f5b2a22110754ce469f5722bade8aeb241e5 (patch) | |
| tree | 00959efe05c52314e168be06c9cb5f54cbf7547e /drivers/tty/tty_port.c | |
| parent | 413ba6385382bc80e4bf2f58efa900e82e810b11 (diff) | |
tty: Flush tty buffers after hardware shutdown
The line discipline buffer and the tty buffers must be flushed again
after hardware shutdown; otherwise, a brief window exists between the
ldisc flush in tty_port_close_start() and the subsequent
tty_port_shutdown(), during which more data could be received into the
tty buffers. A racing open might then be able to receive data from the
previous session.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/tty_port.c')
| -rw-r--r-- | drivers/tty/tty_port.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 3b641d115fd2..4d9abaa81be4 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -520,6 +520,7 @@ void tty_port_close_end(struct tty_port *port, struct tty_struct *tty) { unsigned long flags; + tty_ldisc_flush(tty); tty->closing = 0; spin_lock_irqsave(&port->lock, flags); |