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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [PNV/ILK Regression]X will be no response when run all piglit cases"
href="https://bugs.freedesktop.org/show_bug.cgi?id=76671#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [PNV/ILK Regression]X will be no response when run all piglit cases"
href="https://bugs.freedesktop.org/show_bug.cgi?id=76671">bug 76671</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>I think:
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c
b/drivers/gpu/drm/i915/i915_gem_context.c
index 021e21223c9c..91000ff1b626 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -506,9 +506,6 @@ int i915_gem_context_enable(struct drm_i915_private
*dev_priv)
struct intel_ring_buffer *ring;
int ret, i;
- if (!HAS_HW_CONTEXTS(dev_priv->dev))
- return 0;
-
/* This is the only place the aliasing PPGTT gets enabled, which means
* it has to happen before we bail on reset */
if (dev_priv->mm.aliasing_ppgtt) {
@@ -833,7 +830,13 @@ int i915_switch_context(struct intel_ring_buffer *ring,
/* We have the fake context */
if (!HAS_HW_CONTEXTS(ring->dev)) {
- ring->last_context = to;
+ if (to != ring->last_context) {
+ if (to)
+ i915_gem_context_reference(to);
+ if (ring->last_context)
+ i915_gem_context_unreference(ring->last_context);
+ ring->last_context = to;
+ }
return 0;
}</pre>
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