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authorfrançois romieu <romieu@fr.zoreil.com>2013-01-24 17:30:06 +0400
committerDavid S. Miller <davem@davemloft.net>2013-01-28 04:28:58 +0400
commitce11ff5e5963e441feb591e76278528f876c332d (patch)
tree9a4827b199a5e885b5e942684af2345df32533b2 /drivers/net/ethernet/realtek
parent56a666dcfcb46e998a1bd969fb201bf51de3c412 (diff)
downloadlinux-ce11ff5e5963e441feb591e76278528f876c332d.tar.xz
r8169: fix vlan tag read ordering.
Control of receive descriptor must not be returned to ethernet chipset before vlan tag processing is done. VLAN tag receive word is now reset both in normal and error path. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Spotted-by: Timo Teras <timo.teras@iki.fi> Cc: Hayes Wang <hayeswang@realtek.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/realtek')
-rw-r--r--drivers/net/ethernet/realtek/r8169.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index c28bc318cec6..11702324a071 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -1826,8 +1826,6 @@ static void rtl8169_rx_vlan_tag(struct RxDesc *desc, struct sk_buff *skb)
if (opts2 & RxVlanTag)
__vlan_hwaccel_put_tag(skb, swab16(opts2 & 0xffff));
-
- desc->opts2 = 0;
}
static int rtl8169_gset_tbi(struct net_device *dev, struct ethtool_cmd *cmd)
@@ -6064,8 +6062,6 @@ static int rtl_rx(struct net_device *dev, struct rtl8169_private *tp, u32 budget
!(status & (RxRWT | RxFOVF)) &&
(dev->features & NETIF_F_RXALL))
goto process_pkt;
-
- rtl8169_mark_to_asic(desc, rx_buf_sz);
} else {
struct sk_buff *skb;
dma_addr_t addr;
@@ -6086,16 +6082,14 @@ process_pkt:
if (unlikely(rtl8169_fragmented_frame(status))) {
dev->stats.rx_dropped++;
dev->stats.rx_length_errors++;
- rtl8169_mark_to_asic(desc, rx_buf_sz);
- continue;
+ goto release_descriptor;
}
skb = rtl8169_try_rx_copy(tp->Rx_databuff[entry],
tp, pkt_size, addr);
- rtl8169_mark_to_asic(desc, rx_buf_sz);
if (!skb) {
dev->stats.rx_dropped++;
- continue;
+ goto release_descriptor;
}
rtl8169_rx_csum(skb, status);
@@ -6111,6 +6105,10 @@ process_pkt:
tp->rx_stats.bytes += pkt_size;
u64_stats_update_end(&tp->rx_stats.syncp);
}
+release_descriptor:
+ desc->opts2 = 0;
+ wmb();
+ rtl8169_mark_to_asic(desc, rx_buf_sz);
}
count = cur_rx - tp->cur_rx;