[01/14] drm/i915: Cleanup gt powerstate from gem

Commit Message

Chris Wilson Aug. 12, 2018, 10:36 p.m. UTC

Since the gt powerstate is allocated by i915_gem_init, clean it from
i915_gem_fini for symmetry and to correct the imbalance on error.

Signed-off-by: Chris Wilson <[e-mail]>
---
 drivers/gpu/drm/i915/i915_gem.c      | 3 +++
 drivers/gpu/drm/i915/intel_display.c | 4 ----
 2 files changed, 3 insertions(+), 4 deletions(-)

Comments

Mika Kuoppala Aug. 13, 2018, 4:04 p.m. UTC | #1

Chris Wilson <[e-mail]> writes:

> Since the gt powerstate is allocated by i915_gem_init, clean it from
> i915_gem_fini for symmetry and to correct the imbalance on error.
>

Was first confused about the allocation as it is embedded.
But vlv really does allocate an underlying power context object.

And the asymmetry could lead to freeing an not allocated
object on error path.

> Signed-off-by: Chris Wilson <[e-mail]>

Reviewed-by: Mika Kuoppala <[e-mail]>

Patch

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 71502512ac1f..0453eb42a1a3 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -5634,6 +5634,7 @@  int i915_gem_init(struct drm_i915_private *dev_priv)
 void i915_gem_fini(struct drm_i915_private *dev_priv)
 {
 	i915_gem_suspend_late(dev_priv);
+	intel_disable_gt_powersave(dev_priv);
 
 	/* Flush any outstanding unpin_work. */
 	i915_gem_drain_workqueue(dev_priv);
@@ -5645,6 +5646,8 @@  void i915_gem_fini(struct drm_i915_private *dev_priv)
 	i915_gem_contexts_fini(dev_priv);
 	mutex_unlock(&dev_priv->drm.struct_mutex);
 
+	intel_cleanup_gt_powersave(dev_priv);
+
 	intel_uc_fini_misc(dev_priv);
 	i915_gem_cleanup_userptr(dev_priv);
 
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 53e7a7e75384..cc3f21ddae9c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -15991,8 +15991,6 @@  void intel_modeset_cleanup(struct drm_device *dev)
 	flush_work(&dev_priv->atomic_helper.free_work);
 	WARN_ON(!llist_empty(&dev_priv->atomic_helper.free_list));
 
-	intel_disable_gt_powersave(dev_priv);
-
 	/*
 	 * Interrupts and polling as the first thing to avoid creating havoc.
 	 * Too much stuff here (turning of connectors, ...) would
@@ -16020,8 +16018,6 @@  void intel_modeset_cleanup(struct drm_device *dev)
 
 	intel_cleanup_overlay(dev_priv);
 
-	intel_cleanup_gt_powersave(dev_priv);
-
 	intel_teardown_gmbus(dev_priv);
 
 	destroy_workqueue(dev_priv->modeset_wq);