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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BAT][CI] kernel BUG at drivers/gpu/drm/i915/intel_lrc.c:880!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102035#c39">Comment # 39</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [BAT][CI] kernel BUG at drivers/gpu/drm/i915/intel_lrc.c:880!"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102035">bug 102035</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>Talking point:
diff --git a/drivers/gpu/drm/i915/intel_lrc.c
b/drivers/gpu/drm/i915/intel_lrc.c
index 6b10a01dd371..f5be85a01f83 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -905,6 +905,8 @@ static void intel_lrc_irq_handler(unsigned long data)
/* After the final element, the hw should be idle */
GEM_BUG_ON(port_count(port) == 0 &&
!(status & GEN8_CTX_STATUS_ACTIVE_IDLE));
+ if (status & GEN8_CTX_STATUS_ACTIVE_IDLE)
+ mdelay(2);
}
if (head != execlists->csb_head) {
prevents the COMPLETED | PREEMPT occurring after the COMPLETED | ACTIVE_IDLE.
(Or just significantly increased the mtbf to mask the issue.)</pre>
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