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Commit 6541b806 authored by Michael Chan's avatar Michael Chan Committed by David S. Miller
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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: default avatarMichael Chan <mchan@broadcom.com>
Reviewed-by: default avatarBenjamin Li <benli@broadcom.com>
Reviewed-by: default avatarMatt Carlson <mcarlson@broadcom.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c441b456

drivers/net/ethernet/broadcom/tg3.c

+9 −0
Original line number Diff line number Diff line
@@ -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);