drm/i915: Flush GT idle status upon reset

Upon resetting the GPU, we force the engines to be idle by clearing
their request lists. However, I neglected to clear the GT active status
and so the next request following the reset was not marking the device
as busy again. (We had to wait until any outstanding retire worker
finally ran and cleared the active status.)

Fixes: 67d97da34917 ("drm/i915: Only start retire worker when idle")
Testcase: igt/pm_rps/reset
Signed-off-by: Chris Wilson <[email protected]>
Cc: Joonas Lahtinen <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
Reviewed-by: Joonas Lahtinen <[email protected]>
(cherry picked from commit b913b33c43db849778f044d4b9e74b167898a9bc)
Signed-off-by: Jani Nikula <[email protected]>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 11681501d7b1314e9a996073d4bdba48226a22b0..27ef10e4923e2a5c76ca0f50f5ee5bf03e36e064 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3169,6 +3169,8 @@ static void i915_gem_reset_engine_cleanup(struct intel_engine_cs *engine)
        }
 
        intel_ring_init_seqno(engine, engine->last_submitted_seqno);
+
+       engine->i915->gt.active_engines &= ~intel_engine_flag(engine);
 }
 
 void i915_gem_reset(struct drm_device *dev)
@@ -3186,6 +3188,7 @@ void i915_gem_reset(struct drm_device *dev)
 
        for_each_engine(engine, dev_priv)
                i915_gem_reset_engine_cleanup(engine);
+       mod_delayed_work(dev_priv->wq, &dev_priv->gt.idle_work, 0);
 
        i915_gem_context_reset(dev);