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45 lines
1.2 KiB
Diff
45 lines
1.2 KiB
Diff
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From: Felix Fietkau <nbd@nbd.name>
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Date: Thu, 27 Aug 2020 09:44:43 +0200
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Subject: [PATCH] net: ethernet: mtk_eth_soc: unmap rx data before calling
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build_skb
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Since build_skb accesses the data area (for initializing shinfo), dma unmap
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needs to happen before that call
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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@@ -1297,17 +1297,18 @@ static int mtk_poll_rx(struct napi_struc
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goto release_desc;
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}
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+ dma_unmap_single(eth->dev, trxd.rxd1,
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+ ring->buf_size, DMA_FROM_DEVICE);
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+
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/* receive data */
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skb = build_skb(data, ring->frag_size);
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if (unlikely(!skb)) {
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- skb_free_frag(new_data);
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+ skb_free_frag(data);
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netdev->stats.rx_dropped++;
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- goto release_desc;
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+ goto skip_rx;
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}
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skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN);
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- dma_unmap_single(eth->dev, trxd.rxd1,
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- ring->buf_size, DMA_FROM_DEVICE);
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pktlen = RX_DMA_GET_PLEN0(trxd.rxd2);
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skb->dev = netdev;
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skb_put(skb, pktlen);
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@@ -1325,6 +1326,7 @@ static int mtk_poll_rx(struct napi_struc
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skb_record_rx_queue(skb, 0);
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napi_gro_receive(napi, skb);
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+skip_rx:
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ring->data[idx] = new_data;
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rxd->rxd1 = (unsigned int)dma_addr;
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