[Bug 66932] Screen corruption on Cayman with dpm enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66932

--- Comment #24 from Andre Heider <a.heider at gmail.com> ---
(In reply to comment #22)
> (In reply to comment #18)
> > Created attachment 82559 [details] [review] [review]
> > weird fix
> > 
> 
> Hmmm, looks like a compiler bug.  what compiler are you using?

gcc version 4.8.1 (Ubuntu/Linaro 4.8.1-6ubuntu1) 

But I think the compiler is right in this case. struct ATOM_INIT_REG_BLOCK
doesn't represent what radeon_atom_init_mc_reg_table() is doing.

The struct in the header reads:
...
ATOM_INIT_REG_INDEX_FORMAT asRegIndexBuf[1];
ATOM_MEMORY_SETTING_DATA_BLOCK    asRegDataBuf[1];

So reg_block->asRegIndexBuf[i] for i>0 is not defined, its within asRegDataBuf
or even pass the size of the struct.

It looks like this gcc is killing the while loop because i can never be
anything else than zero.

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