[Intel-gfx] [PATCH 13/56] drm/i915: clean up PPGTT init error path

[Ben Widawsky]

The old code (I'm having trouble finding the commit) had a reason for
doing things when there was an error, and would continue on, thus the
!ret. For the newer code however, this looks completely silly.

Follow the normal idiom of if (ret) return ret.

Also, put the pde wiring in the gen specific init, now that GEN8 exists.

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 5ca8208..08b1b25 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -1180,6 +1180,8 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
 	ppgtt->pd_offset =
 		ppgtt->node.start / PAGE_SIZE * sizeof(gen6_gtt_pte_t);
 
+	gen6_write_pdes(ppgtt);
+
 	ppgtt->base.clear_range(&ppgtt->base, 0, ppgtt->base.total, true);
 
 	DRM_DEBUG_DRIVER("Allocated pde space (%ldM) at GTT entry: %lx\n",
@@ -1204,20 +1206,14 @@ int i915_gem_init_ppgtt(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt)
 	else
 		BUG();
 
-	if (!ret) {
-		struct drm_i915_private *dev_priv = dev->dev_private;
-		kref_init(&ppgtt->ref);
-		drm_mm_init(&ppgtt->base.mm, ppgtt->base.start,
-			    ppgtt->base.total);
-		i915_init_vm(dev_priv, &ppgtt->base);
-		if (INTEL_INFO(dev)->gen < 8) {
-			gen6_write_pdes(ppgtt);
-			DRM_DEBUG("Adding PPGTT at offset %x\n",
-				  ppgtt->pd_offset << 10);
-		}
-	}
+	if (ret)
+		return ret;
 
-	return ret;
+	kref_init(&ppgtt->ref);
+	drm_mm_init(&ppgtt->base.mm, ppgtt->base.start, ppgtt->base.total);
+	i915_init_vm(dev_priv, &ppgtt->base);
+
+	return 0;
 }
 
 static void
-- 
1.9.2