When we drop caches, this debugfs entry does hardware access later in
the chain, when fences are updated, so it needs a runtime pm ref.
Dropping caches is used by some igt/bat tests, so this fixes
some unclaimed register access traces.
Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_debugfs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 24318b7..bd8ba7e 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -4839,6 +4839,8 @@ i915_drop_caches_set(void *data, u64 val)
if (ret)
return ret;
+ intel_runtime_pm_get(dev_priv);
+
if (val & DROP_ACTIVE) {
ret = i915_gpu_idle(dev);
if (ret)
@@ -4855,6 +4857,7 @@ i915_drop_caches_set(void *data, u64 val)
i915_gem_shrink(dev_priv, LONG_MAX, I915_SHRINK_UNBOUND);
unlock:
+ intel_runtime_pm_put(dev_priv);
mutex_unlock(&dev->struct_mutex);
return ret;
--
2.5.0
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