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authorSergei Shtylyov <sergei.shtylyov@cogentembedded.com>2015-10-24 00:46:03 +0300
committerSasha Levin <sasha.levin@oracle.com>2016-07-10 23:07:02 -0400
commit52643323baa9f6aea370fb00c9a01798ff727302 (patch)
treee89a23565b8c4c0453483ed11479947036abb72c /drivers/net
parentc5e6283a4379eaae2d7fe596fc29ea02a14ac818 (diff)
sh_eth: fix RX buffer size alignment
[ Upstream commit ab8579169b79c062935dade949287113c7c1ba73 ] Both Renesas R-Car and RZ/A1 manuals state that RX buffer length must be a multiple of 32 bytes, while the driver only uses 16 byte granularity... Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/renesas/sh_eth.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 51eff9fefb4e..c93a458f96f7 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -1148,8 +1148,8 @@ static void sh_eth_ring_format(struct net_device *ndev)
/* RX descriptor */
rxdesc = &mdp->rx_ring[i];
- /* The size of the buffer is a multiple of 16 bytes. */
- rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16);
+ /* The size of the buffer is a multiple of 32 bytes. */
+ rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 32);
dma_addr = dma_map_single(&ndev->dev, skb->data,
rxdesc->buffer_length,
DMA_FROM_DEVICE);
@@ -1507,7 +1507,7 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
if (mdp->cd->rpadir)
skb_reserve(skb, NET_IP_ALIGN);
dma_unmap_single(&ndev->dev, rxdesc->addr,
- ALIGN(mdp->rx_buf_sz, 16),
+ ALIGN(mdp->rx_buf_sz, 32),
DMA_FROM_DEVICE);
skb_put(skb, pkt_len);
skb->protocol = eth_type_trans(skb, ndev);
@@ -1525,8 +1525,8 @@ static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
for (; mdp->cur_rx - mdp->dirty_rx > 0; mdp->dirty_rx++) {
entry = mdp->dirty_rx % mdp->num_rx_ring;
rxdesc = &mdp->rx_ring[entry];
- /* The size of the buffer is 16 byte boundary. */
- rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16);
+ /* The size of the buffer is 32 byte boundary. */
+ rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 32);
if (mdp->rx_skbuff[entry] == NULL) {
skb = netdev_alloc_skb(ndev, skbuff_size);