[bug report] drm/i915/kunit: DP link: add fallback tests

[Dan Carpenter <error27@gmail.com>]

Hello Imre Deak,

Commit 4fee95d4f887 ("drm/i915/kunit: DP link: add fallback tests")
from Jul 1, 2026 (linux-next), leads to the following Smatch static
checker warning:

	drivers/gpu/drm/i915/display/tests/intel_dp_link_test.c:1223 get_fallback_config()
	warn: ignoring unreachable code.

drivers/gpu/drm/i915/display/tests/intel_dp_link_test.c
    1210 static bool get_fallback_config(const struct test_config_table *expected_table,
    1211                                 enum intel_output_type output_type,
    1212                                 const struct intel_dp_link_config *target_config,
    1213                                 struct intel_dp_link_config *fallback_config)
    1214 {
    1215         struct kunit *test = expected_table->test;
    1216         const struct link_config_set *config_set =
    1217                 get_fallback_configs_for_output_type(test, output_type);
    1218         int i;
    1219 
    1220         i = lookup_config(config_set, target_config);
    1221         KUNIT_ASSERT_GE(test, i, 0);
    1222 
--> 1223         for (i--; i >= 0; i--) {
    1224                 const struct intel_dp_link_config *config =
    1225                         &config_set->entries[i];
    1226 
    1227                 assert_config_is_supported(expected_table, config);
    1228                 *fallback_config = *config;
    1229 
    1230                 return true;

This return statement means this for loop doesn't loop.

    1231         }
    1232 
    1233         return false;
    1234 }

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regards,
dan carpenter