[Bug 99851] [drm:.r600_ring_test [radeon]] *ERROR* radeon: ring 0 test failed (scratch(0x8504)=0xCAFEDEAD)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99851

--- Comment #44 from erhard_f at mailbox.org ---
Finally I was able to finish the bisect with some help from slyfox from
#gentoo-powerpc. At last...

I made a second bisect in search of the fix for the "Couldn't allocate pmd
pagetable caches" error, which I found in commit
bf5ca68dd2eef59a936969e802d811bdac4709c2 (powerpc: Fix pgtable pmd cache init).
I applied this commit via git cherry-pick --no-commit to my first bisect and
was able to continue withouth further skips. So, the final candidate for the
"ring 0" error is:

commit 60db3a4d8cc9073cf56264785197ba75ee1caca4 (refs/bisect/bad)
Author: Sinan Kaya <okaya at codeaurora.org>

    PCI: Enable PCIe Extended Tags if supported

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