drm/i915/selftests: Allow random array allocation to fail

In the selftests, we don't want to force an oom and would rather
ENOMEM be reported. In this case, we would rather the allocation for the
random array to fail.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NMatthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171223110407.21402-2-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/selftests/i915_random.c

@@ -57,7 +57,8 @@ unsigned int *i915_random_order(unsigned int count, struct rnd_state *state)
 {
 	unsigned int *order, i;
 
-	order = kmalloc_array(count, sizeof(*order), GFP_KERNEL | __GFP_NOWARN);
+	order = kmalloc_array(count, sizeof(*order),
+			      GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN);
 	if (!order)
 		return order;