linux-kernel - Re: Odp: possible endless loop in PROM initialization

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Message-ID: <20070820103417.GA4911@vimes.madsworld.lan>
Date:	Mon, 20 Aug 2007 12:34:17 +0200
From:	Markus Dahms <mad@...omagically.de>
To:	Krzysztof Helt <krzysztof.h1@...pl>
Cc:	sparclinux <sparclinux@...r.kernel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Odp: possible endless loop in PROM initialization

Krzysztof Helt wrote,
> Could you give name of the function which contains this endless loop?
> When I looked into the tree.c file for the first time I thought
> it had a bug
> in handling the prom_nextprop, but later I concluded that this is ok.
> Maybe there is a bug there after all.

if I understood it correctly the following functions are called in this
order:

* prom_init()                    # arch/sparc/kernel/head.S
[...]
* create_node()                  # arch/sparc/kernel/prom.c
* build_prop_list()              # arch/sparc/kernel/prom.c
* build_one_prop()               # arch/sparc/kernel/prom.c
* prom_nextprop()                # arch/sparc/prom/tree.c
* __prom_nextprop()              # arch/sparc/prom/tree.c
* prom_nodeops->no_nextprop()    # PROM

And this loops while getting the attributes/properties of the /aliases
node.

Greetings,

	Markus
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