net: hns3: free the pending skb when clean RX ring

[ Upstream commit cc5ff6e90f808f9a4c8229bf2f1de0dfe5d7931c ]

If there is pending skb in RX flow when close the port, and the
pending buffer is not cleaned, the new packet will be added to
the pending skb when the port opens again, and the first new
packet has error data.

This patch cleans the pending skb when clean RX ring.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index ecadd280ab28d7fefd90965d99d1e97fba30d78e..fb5cb15aea9ec65641732d26e0358a75efdfaad4 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -3871,6 +3871,13 @@ static int hns3_clear_rx_ring(struct hns3_enet_ring *ring)
                ring_ptr_move_fw(ring, next_to_use);
        }
 
+       /* Free the pending skb in rx ring */
+       if (ring->skb) {
+               dev_kfree_skb_any(ring->skb);
+               ring->skb = NULL;
+               ring->pending_buf = 0;
+       }
+
        return 0;
 }