[Bug 106385] [GLK] GPU HANG: ecode 9:0:0xfffffffe, reason: hang on rcs0, bcs0, vcs0, vecs0, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106385

--- Comment #10 from Chris Wilson <chris at chris-wilson.co.uk> ---
Another quick test is:

diff --git a/drivers/gpu/drm/i915/intel_lrc.c
b/drivers/gpu/drm/i915/intel_lrc.c
index 9f3cce022b2d..ff179c967e2a 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1738,6 +1738,8 @@ static void enable_execlists(struct intel_engine_cs
*engine)
                   engine->status_page.ggtt_offset);
        POSTING_READ(RING_HWS_PGA(engine->mmio_base));

+       clear_gtiir(engine);
+
        /* Following the reset, we need to reload the CSB read/write pointers
*/
        engine->execlists.csb_head = -1;
 }

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