diff options
| author | Michael Chan <mchan@broadcom.com> | 2012-03-04 14:48:14 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-03-04 20:39:31 -0500 |
| commit | 6541b806b5f267eda8f127bb7f5fec4e7e4db995 (patch) | |
| tree | 2415db513402df4b8c6a5f027a9045a80893b982 /drivers/net/ethernet/broadcom | |
| parent | c441b456767357322dbc14b55bdc7da0051d0d98 (diff) | |
| download | blackbird-op-linux-6541b806b5f267eda8f127bb7f5fec4e7e4db995.tar.gz blackbird-op-linux-6541b806b5f267eda8f127bb7f5fec4e7e4db995.zip | |
tg3: Add memory barriers to sync BD data
for weak memory model architectures to ensure that the chip will DMA
valid BD data.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Reviewed-by: Benjamin Li <benli@broadcom.com>
Reviewed-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom')
| -rw-r--r-- | drivers/net/ethernet/broadcom/tg3.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 4b3243b2bdf1..0da93dbbd0c8 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -5928,6 +5928,9 @@ next_pkt_nopost: /* Refill RX ring(s). */ if (!tg3_flag(tp, ENABLE_RSS)) { + /* Sync BD data before updating mailbox */ + wmb(); + if (work_mask & RXD_OPAQUE_RING_STD) { tpr->rx_std_prod_idx = std_prod_idx & tp->rx_std_ring_mask; @@ -6970,6 +6973,9 @@ static netdev_tx_t tg3_start_xmit(struct sk_buff *skb, struct net_device *dev) skb_tx_timestamp(skb); netdev_sent_queue(tp->dev, skb->len); + /* Sync BD data before updating mailbox */ + wmb(); + /* Packets are ready, update Tx producer idx local and on card. */ tw32_tx_mbox(tnapi->prodmbox, entry); @@ -11763,6 +11769,9 @@ static int tg3_run_loopback(struct tg3 *tp, u32 pktsz, bool tso_loopback) tnapi->tx_prod++; + /* Sync BD data before updating mailbox */ + wmb(); + tw32_tx_mbox(tnapi->prodmbox, tnapi->tx_prod); tr32_mailbox(tnapi->prodmbox); |
