diff options
| author |   françois romieu <romieu@fr.zoreil.com> | 2015-05-01 22:14:43 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-05-04 00:18:26 -0400 |
| commit | 810f19bcb862f8889b27e0c9d9eceac9593925dd (patch) | |
| tree | 17869473e734b25b1cdb553ca3b406efda31f3bd /drivers/net/ethernet/via/via-rhine.c | |
| parent | via-rhine: kiss rx_head_desc goodbye. (diff) | |
| download | linux-dev-810f19bcb862f8889b27e0c9d9eceac9593925dd.tar.xz linux-dev-810f19bcb862f8889b27e0c9d9eceac9593925dd.zip | |
via-rhine: add consistent memory barrier in vlan receive code.
The NAPI receive path depends on desc->rx_status but it does not
enforce any explicit receive barrier.
Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/via/via-rhine.c')
| -rw-r--r-- | drivers/net/ethernet/via/via-rhine.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/drivers/net/ethernet/via/via-rhine.c b/drivers/net/ethernet/via/via-rhine.c index fede9fce7e75..8195fcdff8ab 100644 --- a/drivers/net/ethernet/via/via-rhine.c +++ b/drivers/net/ethernet/via/via-rhine.c @@ -1993,6 +1993,18 @@ static inline u16 rhine_get_vlan_tci(struct sk_buff *skb, int data_size) return be16_to_cpup((__be16 *)trailer); } +static inline void rhine_rx_vlan_tag(struct sk_buff *skb, struct rx_desc *desc, + int data_size) +{ + dma_rmb(); + if (unlikely(desc->desc_length & cpu_to_le32(DescTag))) { + u16 vlan_tci; + + vlan_tci = rhine_get_vlan_tci(skb, data_size); + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); + } +} + /* Process up to limit frames from receive ring */ static int rhine_rx(struct net_device *dev, int limit) { @@ -2008,7 +2020,6 @@ static int rhine_rx(struct net_device *dev, int limit) for (count = 0; count < limit; ++count) { struct rx_desc *desc = rp->rx_ring + entry; u32 desc_status = le32_to_cpu(desc->rx_status); - u32 desc_length = le32_to_cpu(desc->desc_length); int data_size = desc_status >> 16; if (desc_status & DescOwn) @@ -2048,7 +2059,6 @@ static int rhine_rx(struct net_device *dev, int limit) /* Length should omit the CRC */ int pkt_len = data_size - 4; struct sk_buff *skb; - u16 vlan_tci = 0; /* Check if the packet is long enough to accept without copying to a minimally-sized skbuff. */ @@ -2086,14 +2096,10 @@ static int rhine_rx(struct net_device *dev, int limit) } skb_put(skb, pkt_len); - - if (unlikely(desc_length & DescTag)) - vlan_tci = rhine_get_vlan_tci(skb, data_size); - skb->protocol = eth_type_trans(skb, dev); - if (unlikely(desc_length & DescTag)) - __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci); + rhine_rx_vlan_tag(skb, desc, data_size); + netif_receive_skb(skb); u64_stats_update_begin(&rp->rx_stats.syncp); |