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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [sna suse] many black lines with latest ddx"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80948#c37">Comment # 37</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [sna suse] many black lines with latest ddx"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80948">bug 80948</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>diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_d
index d0f3cbc..b4c5507 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -10022,6 +10022,11 @@ static int intel_queue_mmio_flip(struct drm_device
*dev
uint32_t flags)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+ int ret;
+
+ ret = i915_gem_check_olr(obj->last_write_req);
+ if (ret)
+ return ret;
i915_gem_request_assign(&intel_crtc->mmio_flip.req,
obj->last_write_req);</pre>
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