1001-eth-mtk-disable-TBDDONE-support.patch

diff -urN a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c       2020-04-21 14:33:05.702816632 +0800
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c       2020-04-21 14:33:19.590328084 +0800
@@ -1345,10 +1345,11 @@
 		u32 next_cpu = desc->txd2;
 		int mac = 0;
 
-		desc = mtk_qdma_phys_to_virt(ring, desc->txd2);
 		if ((desc->txd3 & TX_DMA_OWNER_CPU) == 0)
 			break;
 
+		desc = mtk_qdma_phys_to_virt(ring, desc->txd2);
+
 		tx_buf = mtk_desc_to_tx_buf(ring, desc);
 		if (tx_buf->flags & MTK_TX_FLAGS_FPORT1)
 			mac = 1;
@@ -2172,7 +2173,7 @@
 
 	if (MTK_HAS_CAPS(eth->soc->caps, MTK_QDMA)) {
 		mtk_w32(eth,
-			MTK_TX_WB_DDONE | MTK_TX_DMA_EN |
+			MTK_TX_DMA_EN |
 			MTK_DMA_SIZE_16DWORDS | MTK_NDP_CO_PRO |
 			MTK_RX_DMA_EN | MTK_RX_2B_OFFSET |
 			MTK_RX_BT_32DWORDS,