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[59.127.145.64]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cd65497e28esm767274a12.7.2026.10.16.02.12.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Oct 2026 02:12:57 -0700 (PDT) From: Zhi-Jun You Date: Fri, 16 Oct 2026 17:12:33 +0800 Subject: [PATCH net v5 1/5] net: ethernet: mtk_wed: skip ring reset in wdma_tx_ring_setup for WED v3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20261016-wedfix-v5-1-8b02e78fd34f@gmail.com> References: <20261016-wedfix-v5-0-8b02e78fd34f@gmail.com> In-Reply-To: <20261016-wedfix-v5-0-8b02e78fd34f@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, Zhi-Jun You X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1792141973; l=1202; i=hujy652@gmail.com; s=20261016; h=from:subject:message-id; bh=3VzB1FLCd2mLzCjg7kaS/GAexp/k2KRl3VSTok/MVlE=; b=5XzbtZKpJ+yde/h6N2QHggLRyxZpPRxz/vp+RwYavuMpb/33Vc1ZKXfd0XtsE81ayaRaOHReS YZ2HLm9vrG6D+qpPZXfGoeFt2VcsBtBboe9mx3MoHFVkvVsdGMvmXBw X-Developer-Key: i=hujy652@gmail.com; a=ed25519; pk=AYHrGhtLNb9z7JIsGOOYWmKKIoVPH7ZZgT+CLIDMuEM= 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 --- 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