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| author | David S. Miller <davem@davemloft.net> | 2016-09-12 15:52:44 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-09-12 15:52:44 -0700 |
| commit | b20b378d49926b82c0a131492fa8842156e0e8a9 (patch) | |
| tree | 7196847eea049a46442b05f99aee1dc571019381 /drivers/net/ethernet/cadence | |
| parent | 02154927c115c7599677df57203988e05b576346 (diff) | |
| parent | da499f8f5385c181e29978fdaab15a58de185302 (diff) | |
| download | linux-b20b378d49926b82c0a131492fa8842156e0e8a9.tar.bz2 | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
drivers/net/ethernet/mediatek/mtk_eth_soc.c
drivers/net/ethernet/qlogic/qed/qed_dcbx.c
drivers/net/phy/Kconfig
All conflicts were cases of overlapping commits.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cadence')
| -rw-r--r-- | drivers/net/ethernet/cadence/macb.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c index 32568392b9f9..0294b6a87265 100644 --- a/drivers/net/ethernet/cadence/macb.c +++ b/drivers/net/ethernet/cadence/macb.c @@ -1339,6 +1339,24 @@ dma_error: return 0; } +static inline int macb_clear_csum(struct sk_buff *skb) +{ + /* no change for packets without checksum offloading */ + if (skb->ip_summed != CHECKSUM_PARTIAL) + return 0; + + /* make sure we can modify the header */ + if (unlikely(skb_cow_head(skb, 0))) + return -1; + + /* initialize checksum field + * This is required - at least for Zynq, which otherwise calculates + * wrong UDP header checksums for UDP packets with UDP data len <=2 + */ + *(__sum16 *)(skb_checksum_start(skb) + skb->csum_offset) = 0; + return 0; +} + static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev) { u16 queue_index = skb_get_queue_mapping(skb); @@ -1378,6 +1396,11 @@ static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_BUSY; } + if (macb_clear_csum(skb)) { + dev_kfree_skb_any(skb); + return NETDEV_TX_OK; + } + /* Map socket buffer for DMA transfer */ if (!macb_tx_map(bp, queue, skb)) { dev_kfree_skb_any(skb); |