Looking for a start point for fixing a bug

[Адонай Элохим]

Hello all!

I have some spare time and knowledge in C to try to fix some bugs I am
seeing on my machine.
So I've checked out and compiled all git trees that I may need and now I'm
beginning to read articles.

And this is the point from where I don't know where to go. I want to fix
particular bug #79806 [1].
For me there are many places where this bug can hide - mesa? dri? radeon
kernel module? and I just don't know whether should I start reading
articles about mesa hacking or about dri architecture or about kernel
module development.

Now I think the best thing for me is to start looking through radeon kernel
module code (I've got ingenious idea that power management resides there)
and read more about its architecture. Is this right? I mean, I just want to
find out, is this a right place to start looking at for this bug?

P.S. Sorry for my English in case it's not good, I'm learning it now

P.P.S. And thanks for your hard work!

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[1] https://bugs.freedesktop.org/show_bug.cgi?id=79806
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