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net: ethernet: mtk_wed: skip ring reset in wdma_tx_ring_setup for WED v3

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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: e2f64db13a ("net: ethernet: mtk_wed: introduce WED support for MT7988")
Reported-by: Sashiko <sashiko-bot@kernel.org>
Link: https://sashiko.dev/#/patchset/20260711112128.971-1-hujy652@gmail.com?part=1
Signed-off-by: Zhi-Jun You <hujy652@gmail.com>
Link: https://patch.msgid.link/20261026-wedfix-v6-1-a52f6b15d2fc@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Zhi-Jun You 2026-10-26 17:57:28 +08:00 committed by Jakub Kicinski
parent 8dc87fc5d6
commit cb50f16f37
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/mediatek/mtk_wed.c
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@ -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) {