tree 00959efe05c52314e168be06c9cb5f54cbf7547e
parent 413ba6385382bc80e4bf2f58efa900e82e810b11
author Peter Hurley <peter@hurleysoftware.com> 1415209205 -0500
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1415314647 -0800

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>