ASoC: Intel: Skylake: Check list empty while getting module info

Module list can be NULL so check if the list is empty before
accessing the list.

Signed-off-by: Senthilnathan Veppur <senthilnathanx.veppur@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/skylake/skl-sst-utils.c

@@ -123,6 +123,11 @@ int snd_skl_get_module_info(struct skl_sst *ctx, u8 *uuid,
 
 	uuid_mod = (uuid_le *)uuid;
 
+	if (list_empty(&ctx->uuid_list)) {
+		dev_err(ctx->dev, "Module list is empty\n");
+		return -EINVAL;
+	}
+
 	list_for_each_entry(module, &ctx->uuid_list, list) {
 		if (uuid_le_cmp(*uuid_mod, module->uuid) == 0) {
 			dfw_config->module_id = module->id;