From: Felix Fietkau Date: Fri, 23 Apr 2021 05:20:55 +0000 (-0700) Subject: net: ethernet: mtk_eth_soc: unmap RX data before calling build_skb X-Git-Tag: v5.15~1236^2~57^2~13 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5196c417854942e218a59ec87bf7d414b3bd581e;p=platform%2Fkernel%2Flinux-starfive.git net: ethernet: mtk_eth_soc: unmap RX data before calling build_skb Since build_skb accesses the data area (for initializing shinfo), dma unmap needs to happen before that call Signed-off-by: Felix Fietkau [Ilya: split build_skb cleanup fix into a separate commit] Signed-off-by: Ilya Lipnitskiy Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index b2175ec..540003f 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -1298,6 +1298,9 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget, goto release_desc; } + dma_unmap_single(eth->dev, trxd.rxd1, + ring->buf_size, DMA_FROM_DEVICE); + /* receive data */ skb = build_skb(data, ring->frag_size); if (unlikely(!skb)) { @@ -1307,8 +1310,6 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget, } skb_reserve(skb, NET_SKB_PAD + NET_IP_ALIGN); - dma_unmap_single(eth->dev, trxd.rxd1, - ring->buf_size, DMA_FROM_DEVICE); pktlen = RX_DMA_GET_PLEN0(trxd.rxd2); skb->dev = netdev; skb_put(skb, pktlen);