This is a note to let you know that I've just added the patch titled
r8169: fix vlan tag read ordering.
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
r8169-fix-vlan-tag-read-ordering.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From romieu@xxxxxxxxxxxxx Thu May 16 18:09:17 2013
From: Francois Romieu <romieu@xxxxxxxxxxxxx>
Date: Fri, 10 May 2013 00:53:11 +0200
Subject: r8169: fix vlan tag read ordering.
To: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx, Hayes Wang <hayeswang@xxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Timo Teras <timo.teras@xxxxxx>
Message-ID: <20130509225311.GC28258@xxxxxxxxxxxxxxxxxxxxxxxxxx>
Content-Disposition: inline
From: Francois Romieu <romieu@xxxxxxxxxxxxx>
commit ce11ff5e5963e441feb591e76278528f876c332d upstream.
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@xxxxxxxxxxxxx>
Spotted-by: Timo Teras <timo.teras@xxxxxx>
Cc: Hayes Wang <hayeswang@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/realtek/r8169.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -1690,8 +1690,6 @@ static void rtl8169_rx_vlan_tag(struct R
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)
@@ -5434,8 +5432,6 @@ static int rtl_rx(struct net_device *dev
!(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;
@@ -5456,16 +5452,14 @@ 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);
@@ -5481,6 +5475,10 @@ 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;
Patches currently in stable-queue which might be from romieu@xxxxxxxxxxxxx are
queue-3.4/r8169-fix-vlan-tag-read-ordering.patch
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