[Bug 56461] NV11 black screen & kernel hang on loading nouveaufb - bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 56461] NV11 black screen & kernel hang on loading nouveaufb
Date: Sun, 09 Dec 2012 22:53:49 +0000	[thread overview]
Message-ID: <bug-56461-8800-cr5DMSDPoj@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-56461-8800-V0hAGp6uBxMKqLRl/0Ahz6D7qz1kEfGD2LY78lusg7I@public.gmane.org/>

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https://bugs.freedesktop.org/show_bug.cgi?id=56461

--- Comment #9 from Chris Paulson-Ellis <chris-Tc38MJj1weLQT0dZR+AlfA@public.gmane.org> ---
Hi,

I only just realised that you sent me a second patch (I thought you were
referring to the first patch, so I went and did the bisect as per my previous
message). I've just tried the second patch against nouveau HEAD. Unfortunately
it causes a NULL pointer dereference. I think this is because when this line in
nv04_timer_init...

n = nouveau_hw_get_clock(((struct nouveau_drm *)nouveau_client(priv))->dev,
PLL_CORE);

...calls nouveau_client() it gets NULL, because the parent of nv04_timer_priv
is a nouveau_device, not a nouveau_drm. I can't see any way to get a pointer to
the drm_device from nv04_timer_init, so I don't think calling
nouveau_hw_get_clock from here is possible.

Chris.

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