From: Chris Wilson Date: Fri, 9 Sep 2016 13:11:59 +0000 (+0100) Subject: drm/i915: Avoid incrementing hangcheck whilst waiting for external fence X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=32c2b4bda62839c527b47bc843aebcdd535c9519;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915: Avoid incrementing hangcheck whilst waiting for external fence If we are waiting upon an external fence, from the pov of hangcheck the engine is stuck on the last submitted seqno. Currently we give a small increment to the hangcheck score in order to catch a stuck waiter / driver. Now that we both have an independent wait hangcheck and may be stuck waiting on an external fence, resetting the GPU has little effect on that external fence. As we cannot advance by resetting, skip incrementing the hangcheck score. Signed-off-by: Chris Wilson Cc: Mika Kuoppala Reviewed-by: Mika Kuoppala Link: http://patchwork.freedesktop.org/patch/msgid/20160909131201.16673-19-chris@chris-wilson.co.uk --- diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index b76d45d91a84..8462817a7dae 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -3099,10 +3099,6 @@ static void i915_hangcheck_elapsed(struct work_struct *work) if (engine->hangcheck.seqno == seqno) { if (i915_seqno_passed(seqno, submit)) { engine->hangcheck.action = HANGCHECK_IDLE; - if (busy) { - /* Safeguard against driver failure */ - engine->hangcheck.score += BUSY; - } } else { /* We always increment the hangcheck score * if the engine is busy and still processing