tty: Flush tty buffers after hardware shutdown

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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>

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Peter Hurley 2014-11-05 12:40:05 -05:00 • committed by Greg Kroah-Hartman

parent 413ba63853

commit 3f40f5b2a2

1 changed files with 1 additions and 0 deletions

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drivers/tty/tty_port.c

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