1 files changed, 26 insertions, 8 deletions

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 9f6890059666..b4895c7b3efd 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -18,6 +18,7 @@
 #include <net/gre.h>
 #include <net/gro.h>
 #include <net/ip6_checksum.h>
+#include <net/page_pool/helpers.h>
 #include <net/pkt_cls.h>
 #include <net/pkt_sched.h>
 #include <net/tcp.h>
@@ -2102,8 +2103,12 @@ static void hns3_tx_doorbell(struct hns3_enet_ring *ring, int num,
 	 */
 	if (test_bit(HNS3_NIC_STATE_TX_PUSH_ENABLE, &priv->state) && num &&
 	    !ring->pending_buf && num <= HNS3_MAX_PUSH_BD_NUM && doorbell) {
+		/* This smp_store_release() pairs with smp_load_aquire() in
+		 * hns3_nic_reclaim_desc(). Ensure that the BD valid bit
+		 * is updated.
+		 */
+		smp_store_release(&ring->last_to_use, ring->next_to_use);
 		hns3_tx_push_bd(ring, num);
-		WRITE_ONCE(ring->last_to_use, ring->next_to_use);
 		return;
 	}
 
@@ -2114,6 +2119,11 @@ static void hns3_tx_doorbell(struct hns3_enet_ring *ring, int num,
 		return;
 	}
 
+	/* This smp_store_release() pairs with smp_load_aquire() in
+	 * hns3_nic_reclaim_desc(). Ensure that the BD valid bit is updated.
+	 */
+	smp_store_release(&ring->last_to_use, ring->next_to_use);
+
 	if (ring->tqp->mem_base)
 		hns3_tx_mem_doorbell(ring);
 	else
@@ -2121,7 +2131,6 @@ static void hns3_tx_doorbell(struct hns3_enet_ring *ring, int num,
 		       ring->tqp->io_base + HNS3_RING_TX_RING_TAIL_REG);
 
 	ring->pending_buf = 0;
-	WRITE_ONCE(ring->last_to_use, ring->next_to_use);
 }
 
 static void hns3_tsyn(struct net_device *netdev, struct sk_buff *skb,
@@ -3307,8 +3316,6 @@ static void hns3_set_default_feature(struct net_device *netdev)
 
 	netdev->priv_flags |= IFF_UNICAST_FLT;
 
-	netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
-
 	netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
 		NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
 		NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
@@ -3562,9 +3569,8 @@ static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
 static bool hns3_nic_reclaim_desc(struct hns3_enet_ring *ring,
 				  int *bytes, int *pkts, int budget)
 {
-	/* pair with ring->last_to_use update in hns3_tx_doorbell(),
-	 * smp_store_release() is not used in hns3_tx_doorbell() because
-	 * the doorbell operation already have the needed barrier operation.
+	/* This smp_load_acquire() pairs with smp_store_release() in
+	 * hns3_tx_doorbell().
 	 */
 	int ltu = smp_load_acquire(&ring->last_to_use);
 	int ntc = ring->next_to_clean;
@@ -5854,6 +5860,9 @@ void hns3_external_lb_prepare(struct net_device *ndev, bool if_running)
 	if (!if_running)
 		return;
 
+	if (test_and_set_bit(HNS3_NIC_STATE_DOWN, &priv->state))
+		return;
+
 	netif_carrier_off(ndev);
 	netif_tx_disable(ndev);
 
@@ -5882,7 +5891,16 @@ void hns3_external_lb_restore(struct net_device *ndev, bool if_running)
 	if (!if_running)
 		return;
 
-	hns3_nic_reset_all_ring(priv->ae_handle);
+	if (hns3_nic_resetting(ndev))
+		return;
+
+	if (!test_bit(HNS3_NIC_STATE_DOWN, &priv->state))
+		return;
+
+	if (hns3_nic_reset_all_ring(priv->ae_handle))
+		return;
+
+	clear_bit(HNS3_NIC_STATE_DOWN, &priv->state);
 
 	for (i = 0; i < priv->vector_num; i++)
 		hns3_vector_enable(&priv->tqp_vector[i]);