@@ -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)
{
@@ -2790,6 +2810,7 @@ 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,
};
@@ -3028,6 +3049,9 @@ 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;
This is a note to let you know that I have just added a patch titled net: mvneta: disable IP checksum with jumbo frames for Armada 370 to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue This patch is scheduled to be released in version 3.19.8-ckt4. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.19.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ------ From 3efa6e445ab6405e5d1a082e69aa4ef5ab30dc92 Mon Sep 17 00:00:00 2001 From: Simon Guinot <simon.guinot@sequanux.org> Date: Tue, 30 Jun 2015 16:20:22 +0200 Subject: 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") Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/net/ethernet/marvell/mvneta.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) -- 1.9.1