From 06615ee5c54740a970754b6d8d7d5e7106dec186 Mon Sep 17 00:00:00 2001 From: Joonas Lahtinen Date: Fri, 24 Apr 2015 15:09:03 +0300 Subject: [PATCH] drm/i915: Do not clear mappings beyond VMA size Do not to clear mappings outside the allocated VMA under any circumstances. Only clear the smaller of VMA or object page count. This is required to allow creating partial object VMAs which in turn are needed for partial GGTT views. Signed-off-by: Joonas Lahtinen Reviewed-by: Tvrtko Ursulin Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_gem_gtt.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c index 9d3852c..fc562c6 100644 --- a/drivers/gpu/drm/i915/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c @@ -1945,19 +1945,23 @@ static void ggtt_unbind_vma(struct i915_vma *vma) struct drm_device *dev = vma->vm->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct drm_i915_gem_object *obj = vma->obj; + const uint64_t size = min_t(uint64_t, + obj->base.size, + vma->node.size); if (vma->bound & GLOBAL_BIND) { vma->vm->clear_range(vma->vm, vma->node.start, - obj->base.size, + size, true); } if (dev_priv->mm.aliasing_ppgtt && vma->bound & LOCAL_BIND) { struct i915_hw_ppgtt *appgtt = dev_priv->mm.aliasing_ppgtt; + appgtt->base.clear_range(&appgtt->base, vma->node.start, - obj->base.size, + size, true); } } -- 2.7.4