From ab18282d58ce67ee5cd720d99a91c1a2bbf3e693 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 22 Sep 2009 18:46:17 +0100 Subject: drm/i915: Warn before mmaping a purgeable buffer. Only allow the user to mmap buffers that have not been marked as purgeable. Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_gem.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/gpu/drm') diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index f4f714e39b7b..4755ba41bfef 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1431,6 +1431,14 @@ i915_gem_mmap_gtt_ioctl(struct drm_device *dev, void *data, obj_priv = obj->driver_private; + if (obj_priv->madv != I915_MADV_WILLNEED) { + DRM_ERROR("Attempting to mmap a purgeable buffer\n"); + drm_gem_object_unreference(obj); + mutex_unlock(&dev->struct_mutex); + return -EINVAL; + } + + if (!obj_priv->mmap_offset) { ret = i915_gem_create_mmap_offset(obj); if (ret) { -- cgit v1.2.3-59-g8ed1b