[PATCH] drm/i915/gem: Execbuffer objects must have struct pages.

[Jonathan Cavitt <jonathan.cavitt@intel.com>]

We cannot write requests to objects without struct pages, so escape
early if the requests are bound to objects that lack them.

Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index d3a771afb083e..e680f78ce34d1 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -3313,6 +3313,13 @@ eb_requests_create(struct i915_execbuffer *eb, struct dma_fence *in_fence,
 	unsigned int i;
 
 	for_each_batch_create_order(eb, i) {
+		/* Do not write requests to objects without struct pages. */
+		if (eb->batches[i]->vma &&
+		    !i915_gem_object_has_struct_page(eb->batches[i]->vma-obj)) {
+			out_fence = ERR_PTR(-EINVAL);
+			return out_fence;
+		}
+
 		/* Allocate a request for this batch buffer nice and early. */
 		eb->requests[i] = i915_request_create(eb_find_context(eb, i));
 		if (IS_ERR(eb->requests[i])) {
-- 
2.25.1