HID: nintendo: check the return value of alloc_workqueue()

The function alloc_workqueue() in nintendo_hid_probe() can fail, but
there is no check of its return value. To fix this bug, its return value
should be checked with new error handling code.

Fixes: c4eae84 ("HID: nintendo: add rumble support")
Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Silvan Jegen <s.jegen@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-nintendo.c

@@ -2128,6 +2128,10 @@ static int nintendo_hid_probe(struct hid_device *hdev,
 	spin_lock_init(&ctlr->lock);
 	ctlr->rumble_queue = alloc_workqueue("hid-nintendo-rumble_wq",
 					     WQ_FREEZABLE | WQ_MEM_RECLAIM, 0);
+	if (!ctlr->rumble_queue) {
+		ret = -ENOMEM;
+		goto err;
+	}
 	INIT_WORK(&ctlr->rumble_worker, joycon_rumble_worker);
 
 	ret = hid_parse(hdev);