[Bug 67276] kernel-3.11 [drm:r600_uvd_ring_test] *ERROR* radeon: ring 5 test failed (0xCAFEDEAD)

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https://bugs.freedesktop.org/show_bug.cgi?id=67276

--- Comment #3 from Joshua Cov. <joshuacov@gmail.com> ---
I have to say that I'm using kernel 3.10.3 with all radeon patches
(drm-next-3.11 and drm-fixes-3.11) applied to it. The prooblem started after
applying the fixes...

However I needed to fix commit 1b6e5fd5f4fc152064f4f71cea0bcfeb49e29b8b
"drm/radeon: add missing ttm_eu_backoff_reservation to radeon_bo_list_validate"
for 3.10 with deleting the ticket parameter from the function
ttm_eu_backoff_reservation(). The commit looks like this for the kernel-3.10:

diff --git a/drivers/gpu/drm/radeon/radeon_object.c
b/drivers/gpu/drm/radeon/radeon_object.c
index 0219d26..2020bf4 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -377,6 +377,7 @@ int radeon_bo_list_validate(struct ww_acquire_ctx *ticket,
domain = lobj->alt_domain;
goto retry;
     }
+    ttm_eu_backoff_reservation(head);
     return r;
   }
 }

I'm suspecting this commit as the culprit of the problem. However I cannot
verify it because I still cannot forcibly trigger the error.

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