ASoC: stm32: sai: add missing put_device()

commit 1c3816a1 upstream.

The of_find_device_by_node() takes a reference to the underlying device
structure, we should release that reference.

Fixes: 7dd0d835 ("ASoC: stm32: sai: simplify sync modes management")
Signed-off-by: Wen Yang <yellowriver2010@hotmail.com>
Acked-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

sound/soc/stm/stm32_sai.c

@@ -112,16 +112,21 @@ static int stm32_sai_set_sync(struct stm32_sai_data *sai_client,
 	if (!sai_provider) {
 		dev_err(&sai_client->pdev->dev,
 			"SAI sync provider data not found\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out_put_dev;
 	}
 
 	/* Configure sync client */
 	ret = stm32_sai_sync_conf_client(sai_client, synci);
 	if (ret < 0)
-		return ret;
+		goto out_put_dev;
 
 	/* Configure sync provider */
-	return stm32_sai_sync_conf_provider(sai_provider, synco);
+	ret = stm32_sai_sync_conf_provider(sai_provider, synco);
+
+out_put_dev:
+	put_device(&pdev->dev);
+	return ret;
 }
 
 static int stm32_sai_probe(struct platform_device *pdev)