[PATCH net] net:ethernet: mtk_wed: setup WDMA_RING_TX(0) for non-DBDC MT7986

[Zhi-Jun You]

WDMA_RING_TX(0) is required to set MTK_WED_WDMA_RING_TX for WED RX
but on a non-DBDC MT7986 it is never setup because idx is 1.

Setting MTK_WED_WDMA_RING_TX with WDMA_RING_TX(1) is not feasible because
WED still tries to send through WDMA_RING_TX(0). This is verified with
register dump.

Fix this by calling mtk_wed_wdma_tx_ring_setup if WDMA_RING_TX(0) is not
setup and guard it with mtk_wed_is_v2.

Fixes: 4c5de09eb0d0 ("net: ethernet: mtk_wed: add configure wed wo support")
Signed-off-by: Zhi-Jun You <hujy652 at gmail.com>
---
 drivers/net/ethernet/mediatek/mtk_wed.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c
index 10d9beaae372..2420557f6c96 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -2334,6 +2334,10 @@ mtk_wed_start(struct mtk_wed_device *dev, u32 irq_mask)
 		if (!dev->rx_wdma[i].desc)
 			mtk_wed_wdma_rx_ring_setup(dev, i, 16, false);
 
+	if (mtk_wed_is_v2(dev->hw))
+		if (!dev->tx_wdma[0].desc)
+			mtk_wed_wdma_tx_ring_setup(dev, 0, MTK_WED_WDMA_RING_SIZE, false);
+
 	if (dev->wlan.hw_rro) {
 		for (i = 0; i < MTK_WED_RX_PAGE_QUEUES; i++) {
 			u32 addr = MTK_WED_RRO_MSDU_PG_CTRL0(i) +
-- 
2.47.3