[Intel-gfx] [PATCH 11/61] drm/i915: No longer allow exporting userptr through dma-buf

Maarten Lankhorst
2020-10-02T13:00:09Z

It doesn't make sense to export a memory address, we will prevent
allowing access this way to different address spaces when we
rework userptr handling, so best to explicitly disable it.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
index 136a589e5d94..9c1293c99d88 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
@@ -694,10 +694,9 @@ i915_gem_userptr_release(struct drm_i915_gem_object *obj)
static int
i915_gem_userptr_dmabuf_export(struct drm_i915_gem_object *obj)
{
- if (obj->userptr.mmu_object)
- return 0;
+ drm_dbg(obj->base.dev, "Exporting userptr no longer allowed\n");

- return i915_gem_userptr_init__mmu_notifier(obj, 0);
+ return -EINVAL;
}

static int