提交 6541b806 编写于 作者: M Michael Chan 提交者: David S. Miller

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: NMichael Chan <mchan@broadcom.com>
Reviewed-by: NBenjamin Li <benli@broadcom.com>
Reviewed-by: NMatt Carlson <mcarlson@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 c441b456
......@@ -5928,6 +5928,9 @@ static int tg3_rx(struct tg3_napi *tnapi, int budget)
/* 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);
......
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