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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Kernel unaligned access at TPC[105d9fb4] nvkm_instobj_wr32+0x14/0x20 [nouveau]"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96836#c15">Comment # 15</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Kernel unaligned access at TPC[105d9fb4] nvkm_instobj_wr32+0x14/0x20 [nouveau]"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96836">bug 96836</a>
from <span class="vcard"><a class="email" href="mailto:imirkin@alum.mit.edu" title="Ilia Mirkin <imirkin@alum.mit.edu>"> <span class="fn">Ilia Mirkin</span></a>
</span></b>
<pre>(In reply to Ilia Mirkin from <a href="show_bug.cgi?id=96836#c14">comment #14</a>)
<span class="quote">> OK, well let's start small. One source of problems is that we have
>
> drivers/gpu/drm/nouveau/nouveau_bios.h:#define ROM16(x) le16_to_cpu(*(u16
> *)&(x))
>
> Which can only work on aligned pointers x, but it gets called with unaligned
> offsets in nouveau_bios.c
>
> Can you try changing that to
>
> #define ROM16(x) get_unaligned_le16(&(x))
>
> I'm guessing that will help with the first group of unaligned traps.</span >
Oh, and same treatment for ROM32 of course (and ROM64 while you're at it, but
that never gets called from what I can tell).</pre>
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