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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [GLK] GPU HANG: ecode 9:0:0xfffffffe, reason: hang on rcs0, bcs0, vcs0, vecs0, action: reset"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106385#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [GLK] GPU HANG: ecode 9:0:0xfffffffe, reason: hang on rcs0, bcs0, vcs0, vecs0, action: reset"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106385">bug 106385</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>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;
}</pre>
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