netdev - [Patch 1/2] s2io: add dynamic LRO disable support

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Message-Id: <20100603034303.5305.55552.sendpatchset@localhost.localdomain>
Date:	Wed, 2 Jun 2010 23:38:59 -0400
From:	Amerigo Wang <amwang@...hat.com>
To:	netdev@...r.kernel.org
Cc:	herbert.xu@...hat.com, nhorman@...hat.com, sgruszka@...hat.com,
	Amerigo Wang <amwang@...hat.com>, davem@...emloft.net
Subject: [Patch 1/2] s2io: add dynamic LRO disable support


This patch adds dynamic LRO diable support for s2io net driver.

I don't have s2io card, so only did compiling test. Anyone who wants
to test this is more than welcome.

This is based on Neil's initial work.

Signed-off-by: WANG Cong <amwang@...hat.com>
Signed-off-by: Neil Horman <nhorman@...hat.com>
Acked-by: Neil Horman <nhorman@...hat.com>
Reviewed-by: Stanislaw Gruszka <sgruszka@...hat.com>


---
diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index 668327c..9db5df7 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -6684,6 +6684,35 @@ static int s2io_ethtool_op_set_tso(struct net_device *dev, u32 data)
 
 	return 0;
 }
+static int s2io_ethtool_set_flags(struct net_device *dev, u32 data)
+{
+	struct s2io_nic *sp = netdev_priv(dev);
+	int rc = 0;
+	int changed = 0;
+
+	if (data & ETH_FLAG_LRO) {
+		if (lro_enable) {
+			if (!(dev->features & NETIF_F_LRO)) {
+				dev->features |= NETIF_F_LRO;
+				changed = 1;
+			}
+		} else
+			rc = -EINVAL;
+	} else if (dev->features & NETIF_F_LRO) {
+		dev->features &= ~NETIF_F_LRO;
+		changed = 1;
+	}
+
+	if (changed && netif_running(dev)) {
+		s2io_stop_all_tx_queue(sp);
+		s2io_card_down(sp);
+		sp->lro = dev->features & NETIF_F_LRO;
+		rc = s2io_card_up(sp);
+		s2io_start_all_tx_queue(sp);
+	}
+
+	return rc;
+}
 
 static const struct ethtool_ops netdev_ethtool_ops = {
 	.get_settings = s2io_ethtool_gset,
@@ -6701,6 +6730,8 @@ static const struct ethtool_ops netdev_ethtool_ops = {
 	.get_rx_csum = s2io_ethtool_get_rx_csum,
 	.set_rx_csum = s2io_ethtool_set_rx_csum,
 	.set_tx_csum = s2io_ethtool_op_set_tx_csum,
+	.set_flags = s2io_ethtool_set_flags,
+	.get_flags = ethtool_op_get_flags,
 	.set_sg = ethtool_op_set_sg,
 	.get_tso = s2io_ethtool_op_get_tso,
 	.set_tso = s2io_ethtool_op_set_tso,
--
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