tree 9ac73a342940bb6c283e37f23e8384155c59dfb1
parent 5c17c861a357e9458001f021a7afa7aab9937439
author Peter Hurley <peter@hurleysoftware.com> 1452494456 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1453879074 -0800

n_tty: Fix unsafe reference to "other" ldisc

Although n_tty_check_unthrottle() has a valid ldisc reference (since
the tty core gets the ldisc ref in tty_read() before calling the line
discipline read() method), it does not have a valid ldisc reference to
the "other" pty of a pty pair. Since getting an ldisc reference for
tty->link essentially open-codes tty_wakeup(), just replace with the
equivalent tty_wakeup().

Cc: <stable@vger.kernel.org>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>