Currently WED v3 tx wdma ring, ring reset happens in a separate code
block unconditionally.
Moreover, v3 has double the size of wdma_desc and has different init
values. mtk_wed_ring_reset doens't deal with that and would corrupt the
wdma_desc.
Fix this by skipping mtk_wed_ring_reset in mtk_wdma_tx_ring_setup for
WED v3.
Fixes: e2f64db13aa1 ("net: ethernet: mtk_wed: introduce WED support for MT7988")
Signed-off-by: Zhi-Jun You <redacted>
---
drivers/net/ethernet/mediatek/mtk_wed.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c
index 53d3b7e00e1c..d55042ccaff1 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -1938,7 +1938,7 @@ mtk_wed_wdma_tx_ring_setup(struct mtk_wed_device *dev, int idx, int size,
wdma_w32(dev, MTK_WDMA_RING_TX(idx) + MTK_WED_RING_OFS_CPU_IDX, 0);
wdma_w32(dev, MTK_WDMA_RING_TX(idx) + MTK_WED_RING_OFS_DMA_IDX, 0);
- if (reset)
+ if (!mtk_wed_is_v3_or_greater(dev->hw) && reset)
mtk_wed_ring_reset(wdma, MTK_WED_WDMA_RING_SIZE, true);
if (!idx) {
--
2.47.3