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drm/i915: No longer allow exporting userptr through dma-buf 

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>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210323155059.628690-13-maarten.lankhorst@linux.intel.com
This commit is contained in:
Maarten Lankhorst 2021-03-23 16:50:01 +01:00 committed by Daniel Vetter
parent ae30af84ed
commit ae4e55b894
1 changed files with 2 additions and 3 deletions
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5
drivers/gpu/drm/i915/gem/i915_gem_userptr.c
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@ -694,10 +694,9 @@ i915_gem_userptr_release(struct drm_i915_gem_object *obj)
static int static int
i915_gem_userptr_dmabuf_export(struct drm_i915_gem_object *obj) i915_gem_userptr_dmabuf_export(struct drm_i915_gem_object *obj)
{ {
if (obj->userptr.mmu_object) drm_dbg(obj->base.dev, "Exporting userptr no longer allowed\n");
return 0;
return i915_gem_userptr_init__mmu_notifier(obj, 0); return -EINVAL;
} }
static int static int