drm/i915: Remove early exit on i915_gpu_idle

[Description from: Daniel Vetter]
I've just discussed this quickly with Chris on irc and it's probably
best to just kill the list_empty early bailout. gpu_idle isn't a
fastpath, so who cares. One candidate where we emit commands to the ring
without adding anything onto these lists is e.g. pageflip. There are
probably more.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 0d0ed77..6651c36 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2193,14 +2193,8 @@ int
 i915_gpu_idle(struct drm_device *dev)
 {
        drm_i915_private_t *dev_priv = dev->dev_private;
-       bool lists_empty;
        int ret, i;
 
-       lists_empty = (list_empty(&dev_priv->mm.flushing_list) &&
-                      list_empty(&dev_priv->mm.active_list));
-       if (lists_empty)
-               return 0;
-
        /* Flush everything onto the inactive list. */
        for (i = 0; i < I915_NUM_RINGS; i++) {
                ret = i915_ring_idle(&dev_priv->ring[i]);