From: Chris Wilson Date: Fri, 10 Feb 2017 18:52:14 +0000 (+0000) Subject: drm/i915: Move the irq_barrier for reset earlier into reset_prepare X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8c12d121590ebe5a43bf9a0aedbbeb192f257846;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git drm/i915: Move the irq_barrier for reset earlier into reset_prepare When updating the bookkeeping following the reset, we need the seqno to be coherent on the CPU prior to trusting its result for deciding whether any request is completed. We need the irq_barrier before we start making these decisions, i.e. in reset_prepare. References: https://bugs.freedesktop.org/show_bug.cgi?id=99733 Signed-off-by: Chris Wilson Cc: Mika Kuoppala Link: http://patchwork.freedesktop.org/patch/msgid/20170210185214.23463-1-chris@chris-wilson.co.uk Reviewed-by: Michel Thierry --- diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 303c079b75e8..b8d869d7937d 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2652,6 +2652,9 @@ int i915_gem_reset_prepare(struct drm_i915_private *dev_priv) tasklet_disable(&engine->irq_tasklet); tasklet_kill(&engine->irq_tasklet); + if (engine->irq_seqno_barrier) + engine->irq_seqno_barrier(engine); + if (engine_stalled(engine)) { request = i915_gem_find_active_request(engine); if (request && request->fence.error == -EIO) @@ -2748,9 +2751,6 @@ static void i915_gem_reset_engine(struct intel_engine_cs *engine) { struct drm_i915_gem_request *request; - if (engine->irq_seqno_barrier) - engine->irq_seqno_barrier(engine); - request = i915_gem_find_active_request(engine); if (request && i915_gem_reset_request(request)) { DRM_DEBUG_DRIVER("resetting %s to restart from tail of request 0x%x\n",