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[59.127.145.64]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-8a36bf0f4dcsm1095577b3a.44.2026.10.26.02.57.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Oct 2026 02:57:57 -0700 (PDT) From: Zhi-Jun You Date: Mon, 26 Oct 2026 17:57:28 +0800 Subject: [PATCH net v6 1/4] net: ethernet: mtk_wed: skip ring reset in wdma_tx_ring_setup for WED v3 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261026-wedfix-v6-1-a52f6b15d2fc@gmail.com> References: <20261026-wedfix-v6-0-a52f6b15d2fc@gmail.com> In-Reply-To: <20261026-wedfix-v6-0-a52f6b15d2fc@gmail.com> To: Felix Fietkau , Lorenzo Bianconi , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Matthias Brugger , AngeloGioacchino Del Regno , Sujuan Chen , Rex Lu Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Sashiko , Zhi-Jun You X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1793008668; l=1333; i=hujy652@gmail.com; s=20261026; h=from:subject:message-id; bh=8HcC/sQ6Padav5RauewUundESxCJLuNyI/jOB6FPbeM=; b=R5SprU2ynkzohGH0ikExaLYx4+eF5xyVGdW5pS1EiVbSfrSOVQZkSRDrh4OMF2weeFfeqLWGL ZcrEU0rxM1SCaaLklufzqHafB/m9GBLE0QH7+amfullCkw11RjQdxO6 X-Developer-Key: i=hujy652@gmail.com; a=ed25519; pk=uXjqvnRsKEfHEyUr63sOg4fEJIDs4AmiW/rB1cWarXg= 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") Reported-by: Sashiko Link: https://sashiko.dev/#/patchset/20260711112128.971-1-hujy652@gmail.com?part=1 Signed-off-by: Zhi-Jun You --- 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) { -- 2.55.0