[Intel-gfx] [PATCH 1/2] drm/i915: debugfs/i915_gem_seqno_info does not need rpm nor struct_mutex

[Chris Wilson]

i915_gem_seqno_info() supplies its own spinlocks to access the waiers,
and doesn't need any GGTT or mmio access.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 19777a1abb9c..d4176c4d1c42 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -714,21 +714,11 @@ static void i915_ring_seqno_info(struct seq_file *m,
 static int i915_gem_seqno_info(struct seq_file *m, void *data)
 {
 	struct drm_i915_private *dev_priv = node_to_i915(m->private);
-	struct drm_device *dev = &dev_priv->drm;
 	struct intel_engine_cs *engine;
-	int ret;
-
-	ret = mutex_lock_interruptible(&dev->struct_mutex);
-	if (ret)
-		return ret;
-	intel_runtime_pm_get(dev_priv);
 
 	for_each_engine(engine, dev_priv)
 		i915_ring_seqno_info(m, engine);
 
-	intel_runtime_pm_put(dev_priv);
-	mutex_unlock(&dev->struct_mutex);
-
 	return 0;
 }
 
-- 
2.9.3