Re: [PATCH 2/5] TTY: ldisc, move wait idle to caller

[Tony Luck]

One of my systems (HP rx2620 - ia64) has started hanging during shutdown.
Last messages on the serial console are:

Shutting down service (localfs) network  .  .  .  .  .  .  .  .  .   done
Shutting down D-Bus daemon                                           done
Running /etc/ini

and there it hangs forever in mid word (totally repeatable stops at "ini" every
time).

git bisect blames:

commit 300420722e0734a4254f3b634e0f82664495d210
Author: Jiri Slaby <jslaby@xxxxxxx>
Date:   Wed Nov 16 16:27:08 2011 +0100

    TTY: ldisc, move wait idle to caller

[Though the following commit "TTY: ldisc, wait for ldisc infinitely in hangup"
 sounds like it fits the symptoms]

Ideas?

-Tony
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