From: Sergei Shtylyov Date: Mon, 7 Mar 2016 22:37:09 +0000 (+0300) Subject: sh_eth: advance 'rxdesc' later in sh_eth_ring_format() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=d0ba913488dc8c55d1880f5ed34f096dc45fb05d;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git sh_eth: advance 'rxdesc' later in sh_eth_ring_format() Iff dma_map_single() fails, 'rxdesc' should point to the last filled RX descriptor, so that it can be marked as the last one, however the driver would have already advanced it by that time. In order to fix that, only fill an RX descriptor once all the data for it is ready. Signed-off-by: Sergei Shtylyov Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index 6fb75a1d68b9..2e9a78164054 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -1127,11 +1127,8 @@ static void sh_eth_ring_format(struct net_device *ndev) break; sh_eth_set_receive_align(skb); - /* RX descriptor */ - rxdesc = &mdp->rx_ring[i]; /* The size of the buffer is a multiple of 32 bytes. */ buf_len = ALIGN(mdp->rx_buf_sz, 32); - rxdesc->len = cpu_to_le32(buf_len << 16); dma_addr = dma_map_single(&ndev->dev, skb->data, buf_len, DMA_FROM_DEVICE); if (dma_mapping_error(&ndev->dev, dma_addr)) { @@ -1139,6 +1136,10 @@ static void sh_eth_ring_format(struct net_device *ndev) break; } mdp->rx_skbuff[i] = skb; + + /* RX descriptor */ + rxdesc = &mdp->rx_ring[i]; + rxdesc->len = cpu_to_le32(buf_len << 16); rxdesc->addr = cpu_to_le32(dma_addr); rxdesc->status = cpu_to_le32(RD_RACT | RD_RFP);