pm2301_charger: Return error if create_singlethread_workqueue fails

Return error instead of 0 if create_singlethread_workqueue call fails.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>

drivers/power/pm2301_charger.c

@@ -1075,9 +1075,9 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
 	pm2->ac_chg.external = true;
 
 	/* Create a work queue for the charger */
-	pm2->charger_wq =
-		create_singlethread_workqueue("pm2xxx_charger_wq");
+	pm2->charger_wq = create_singlethread_workqueue("pm2xxx_charger_wq");
 	if (pm2->charger_wq == NULL) {
+		ret = -ENOMEM;
 		dev_err(pm2->dev, "failed to create work queue\n");
 		goto free_device_info;
 	}