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ftgmac100: Add missing barrier in ftgmac100_rx_packet() 

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Benjamin Herrenschmidt 2017-04-06 11:02:50 +10:00 committed by David S. Miller
parent 7b49cd1c9e
commit 027f426d54
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/faraday/ftgmac100.c
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@ -444,6 +444,9 @@ static bool ftgmac100_rx_packet(struct ftgmac100 *priv, int *processed)
if (!ftgmac100_rxdes_packet_ready(rxdes)) if (!ftgmac100_rxdes_packet_ready(rxdes))
return false; return false;
/* Order subsequent reads with the test for the ready bit */
dma_rmb();
/* We don't cope with fragmented RX packets */ /* We don't cope with fragmented RX packets */
if (unlikely(!ftgmac100_rxdes_first_segment(rxdes) || if (unlikely(!ftgmac100_rxdes_first_segment(rxdes) ||
!ftgmac100_rxdes_last_segment(rxdes))) !ftgmac100_rxdes_last_segment(rxdes)))