[Intel-gfx] [PATCH] drm/i915/selftests: Markup impossible error pointers

[Chris Wilson]

If we create a new live_context() we should have a mapping for each
engine. Document that assumption with an assertion.

Reported-by: Dan Carpenter <dan.carpenter at oracle.com>
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld at intel.com>
---
 drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index 3adb60c2fd1f..37a177e37665 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -397,6 +397,7 @@ static int igt_ctx_exec(void *arg)
 			}
 
 			ce = i915_gem_context_get_engine(ctx, engine->legacy_idx);
+			GEM_BUG_ON(IS_ERR(ce));
 
 			if (!obj) {
 				obj = create_test_object(ce->vm, file, &objects);
@@ -521,6 +522,8 @@ static int igt_shared_ctx_exec(void *arg)
 			__assign_ppgtt(ctx, parent->vm);
 
 			ce = i915_gem_context_get_engine(ctx, engine->legacy_idx);
+			GEM_BUG_ON(IS_ERR(ce));
+
 			if (!obj) {
 				obj = create_test_object(parent->vm, file, &objects);
 				if (IS_ERR(obj)) {
-- 
2.23.0