drm/radeon: Only warn if the intra-domain offset actually exceeds the limit.

Fixes spurious warnings.
Tested-by: Dave Jones <davej@redhat.com>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_object.c

@@ -233,7 +233,17 @@ int radeon_bo_pin_restricted(struct radeon_bo *bo, u32 domain, u64 max_offset,
 		bo->pin_count++;
 		if (gpu_addr)
 			*gpu_addr = radeon_bo_gpu_offset(bo);
-		WARN_ON_ONCE(max_offset != 0);
+
+		if (max_offset != 0) {
+			u64 domain_start;
+
+			if (domain == RADEON_GEM_DOMAIN_VRAM)
+				domain_start = bo->rdev->mc.vram_start;
+			else
+				domain_start = bo->rdev->mc.gtt_start;
+			WARN_ON_ONCE((*gpu_addr - domain_start) > max_offset);
+		}
+
 		return 0;
 	}
 	radeon_ttm_placement_from_domain(bo, domain);