Commit 235bde1e authored by Fabio Estevam's avatar Fabio Estevam Committed by David S. Miller
Browse files

net: fec: Call swap_buffer() prior to IP header alignment

Commit 3ac72b7b ("net: fec: align IP header in hardware") breaks
networking on mx28.

There is an erratum on mx28 (ENGR121613 - ENET big endian mode
not compatible with ARM little endian) that requires an additional
byte-swap operation to workaround this problem.

So call swap_buffer() prior to performing the IP header alignment
to restore network functionality on mx28.

Fixes: 3ac72b7b

 ("net: fec: align IP header in hardware")
Reported-and-tested-by: default avatarHenri Roosen <>
Signed-off-by: default avatarFabio Estevam <>
Signed-off-by: default avatarDavid S. Miller <>
parent b678aa57
......@@ -1430,14 +1430,14 @@ fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id)
skb_put(skb, pkt_len - 4);
data = skb->data;
if (!is_copybreak && need_swap)
swap_buffer(data, pkt_len);
#if !defined(CONFIG_M5272)
if (fep->quirks & FEC_QUIRK_HAS_RACC)
data = skb_pull_inline(skb, 2);
if (!is_copybreak && need_swap)
swap_buffer(data, pkt_len);
/* Extract the enhanced buffer descriptor */
ebdp = NULL;
if (fep->bufdesc_ex)
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