diff options
| author | Simon Guinot <simon.guinot@sequanux.org> | 2015-06-30 16:20:22 +0200 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-07-05 10:12:55 -0400 |
| commit | 5ac8dc120f4a11415a6619648ebabd8d7037c26d (patch) | |
| tree | f64cfa4cdd9a8d91bfcd5222a2c15149606112de | |
| parent | d5ced3d143593bf844f5d23fed9fd9d3fdb5b083 (diff) | |
net: mvneta: disable IP checksum with jumbo frames for Armada 370
[ Upstream commit b65657fc240ae6c1d2a1e62db9a0e61ac9631d7a ]
The Ethernet controller found in the Armada 370, 380 and 385 SoCs don't
support TCP/IP checksumming with frame sizes larger than 1600 bytes.
This patch fixes the issue by disabling the features NETIF_F_IP_CSUM and
NETIF_F_TSO for the Armada 370 and compatibles SoCs when the MTU is set
to a value greater than 1600 bytes.
Signed-off-by: Simon Guinot <simon.guinot@sequanux.org>
Fixes: c5aff18204da ("net: mvneta: driver for Marvell Armada 370/XP network unit")
Cc: <stable@vger.kernel.org> # v3.8+
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -rw-r--r-- | drivers/net/ethernet/marvell/mvneta.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index e62c951221ed..fb34708aa5f4 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -304,6 +304,7 @@ struct mvneta_port { unsigned int link; unsigned int duplex; unsigned int speed; + unsigned int tx_csum_limit; }; /* The mvneta_tx_desc and mvneta_rx_desc structures describe the @@ -2441,8 +2442,10 @@ static int mvneta_change_mtu(struct net_device *dev, int mtu) dev->mtu = mtu; - if (!netif_running(dev)) + if (!netif_running(dev)) { + netdev_update_features(dev); return 0; + } /* The interface is running, so we have to force a * reallocation of the queues @@ -2471,9 +2474,26 @@ static int mvneta_change_mtu(struct net_device *dev, int mtu) mvneta_start_dev(pp); mvneta_port_up(pp); + netdev_update_features(dev); + return 0; } +static netdev_features_t mvneta_fix_features(struct net_device *dev, + netdev_features_t features) +{ + struct mvneta_port *pp = netdev_priv(dev); + + if (pp->tx_csum_limit && dev->mtu > pp->tx_csum_limit) { + features &= ~(NETIF_F_IP_CSUM | NETIF_F_TSO); + netdev_info(dev, + "Disable IP checksum for MTU greater than %dB\n", + pp->tx_csum_limit); + } + + return features; +} + /* Get mac address */ static void mvneta_get_mac_addr(struct mvneta_port *pp, unsigned char *addr) { @@ -2791,6 +2811,7 @@ static const struct net_device_ops mvneta_netdev_ops = { .ndo_set_rx_mode = mvneta_set_rx_mode, .ndo_set_mac_address = mvneta_set_mac_addr, .ndo_change_mtu = mvneta_change_mtu, + .ndo_fix_features = mvneta_fix_features, .ndo_get_stats64 = mvneta_get_stats64, .ndo_do_ioctl = mvneta_ioctl, }; @@ -3029,6 +3050,9 @@ static int mvneta_probe(struct platform_device *pdev) } } + if (of_device_is_compatible(dn, "marvell,armada-370-neta")) + pp->tx_csum_limit = 1600; + pp->tx_ring_size = MVNETA_MAX_TXD; pp->rx_ring_size = MVNETA_MAX_RXD; |