[Intel-gfx] [PATCH 2/3] drm/i915/guc: Fix a static analysis warning

[John.C.Harrison at Intel.com]

From: John Harrison <John.C.Harrison at Intel.com>

A static analyser was complaining about not checking for null
pointers. However, the location of the complaint can only be reached
in the first place if said pointer is non-null. Basically, if we are
using a v69 GuC then the descriptor pool is guaranteed to be alocated
at start of day or submission will be disabled with an ENOMEM error.
And if we are using a later GuC that does not use a descriptor pool
then the v69 submission function would not be called. So, not a
possible null at that point in the code.

Hence adding a GEM_BUG_ON(!ptr) to keep the tool happy.

Signed-off-by: John Harrison <John.C.Harrison at Intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index 4682ec1dbd9c0..c93d0594bfd5e 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -2538,6 +2538,7 @@ static void prepare_context_registration_info_v69(struct intel_context *ce)
 		   i915_gem_object_is_lmem(ce->ring->vma->obj));
 
 	desc = __get_lrc_desc_v69(guc, ctx_id);
+	GEM_BUG_ON(!desc);
 	desc->engine_class = engine_class_to_guc_class(engine->class);
 	desc->engine_submit_mask = engine->logical_mask;
 	desc->hw_context_desc = ce->lrc.lrca;
-- 
2.39.0