net: hns: Clean rx fbd when ae stopped.

[ Upstream commit 31f6b61d810654fb3ef43f4d8afda0f44b142fad ]

If there are packets in hardware when changing the speed or duplex,
it may cause hardware hang up.

This patch adds the code to wait rx fbd clean up when ae stopped.

Signed-off-by: Yonglong Liu <liuyonglong@huawei.com>
Signed-off-by: Peng Li <lipeng321@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/hns/hns_ae_adapt.c b/drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c
index b7c8433a7a37803d332f7efa2166a0a3099fbe20..0b4d90ceea7a611c6f990c67762e2c7a6b7b3d25 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c
@@ -290,6 +290,9 @@ void hns_ae_stop(struct hnae_handle *handle)
 
        hns_ae_ring_enable_all(handle, 0);
 
+       /* clean rx fbd. */
+       hns_rcb_wait_fbd_clean(handle->qs, handle->q_num, RCB_INT_FLAG_RX);
+
        (void)hns_mac_vm_config_bc_en(mac_cb, 0, false);
 }