net: hns3: fix napi_disable not return problem

While doing DOWN, the calling of napi_disable() may not return, since the
napi_complete() in the hns3_nic_common_poll() will never be called when
HNS3_NIC_STATE_DOWN is set. So we need to call napi_complete() before
checking HNS3_NIC_STETE_DOWN.

Fixes: ff0699e0 ("net: hns3: stop napi polling when HNS3_NIC_STATE_DOWN is set")
Signed-off-by: NHuazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

@@ -2909,8 +2909,8 @@ static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
 	if (!clean_complete)
 		return budget;
 
-	if (likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state)) &&
-	    napi_complete(napi)) {
+	if (napi_complete(napi) &&
+	    likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
 		hns3_update_new_int_gl(tqp_vector);
 		hns3_mask_vector_irq(tqp_vector, 1);
 	}