tree 3c7e3b21dad828aa404ec5e6df5d8006cdb90815
parent d3ca8b64b97ef4dc54d7bb0b88bbc01a1fca8cb9
author Alan Cox <alan@linux.intel.com> 1338295516 +0100
committer Linus Torvalds <torvalds@linux-foundation.org> 1338313333 -0700

tty: fix ldisc lock inversion trace

This is caused by tty_release using tty_lock_pair to lock both sides of
the pty/tty pair, and then tty_ldisc_release dropping and relocking one
side only.  We can drop both fine, so drop both to avoid any lock
ordering concerns.

Rework the release path to fix the new locking model.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>