drm/xe/mocs: Move warn/assertion up

The warn-once in __init_mocs_table() to make sure there's an index set
for unused entries is more a sanity check that should be done as the
first thing in that function. The kunit test replicates the same check,
so also move it up and turn it into a failure condition for the test.
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240228061048.3661978-4-lucas.demarchi@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/tests/xe_mocs.c

@@ -79,11 +79,12 @@ static void read_mocs_table(struct xe_gt *gt,
 
 	struct kunit *test = xe_cur_kunit();
 
+	KUNIT_EXPECT_TRUE_MSG(test, info->unused_entries_index,
+			      "Unused entries index should have been defined\n");
+
 	ret = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);
 	KUNIT_ASSERT_EQ_MSG(test, ret, 0, "Forcewake Failed.\n");
 	mocs_dbg(&gt_to_xe(gt)->drm, "Global MOCS entries:%d\n", info->n_entries);
-	drm_WARN_ONCE(&xe->drm, !info->unused_entries_index,
-		      "Unused entries index should have been defined\n");
 
 	for (i = 0; i < info->n_entries; i++) {
 		mocs = get_entry_control(info, i);

drivers/gpu/drm/xe/xe_mocs.c

@@ -470,9 +470,11 @@ static void __init_mocs_table(struct xe_gt *gt,
 	unsigned int i;
 	u32 mocs;
 
-	mocs_dbg(&gt_to_xe(gt)->drm, "mocs entries: %d\n", info->n_entries);
 	drm_WARN_ONCE(&xe->drm, !info->unused_entries_index,
 		      "Unused entries index should have been defined\n");
+
+	mocs_dbg(&gt_to_xe(gt)->drm, "mocs entries: %d\n", info->n_entries);
+
 	for (i = 0; i < info->n_entries; i++) {
 		mocs = get_entry_control(info, i);