netdev - [PATCH net-2.6 2/2] net: Disable NETIF_F_TSO

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Date:	Wed, 13 Apr 2011 01:47:15 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org,
	Michał Mirosław <mirq-linux@...e.qmqm.pl>
Subject: [PATCH net-2.6 2/2] net: Disable NETIF_F_TSO_ECN when TSO is
 disabled

NETIF_F_TSO_ECN has no effect when TSO is disabled; this just means
that feature state will be accurately reported to user-space.

Signed-off-by: Ben Hutchings <bhutchings@...arflare.com>
---
This one is silent; I'm not sure that it's worth mentioning as the
feature flag previously had no effect on its own anyway.

Ben.

 net/core/dev.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 6401fb5..c2ac599 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5208,6 +5208,10 @@ u32 netdev_fix_features(struct net_device *dev, u32 features)
 		features &= ~NETIF_F_ALL_TSO;
 	}
 
+	/* TSO ECN requires that TSO is present as well. */
+	if ((features & NETIF_F_ALL_TSO) == NETIF_F_TSO_ECN)
+		features &= ~NETIF_F_TSO_ECN;
+
 	/* Software GSO depends on SG. */
 	if ((features & NETIF_F_GSO) && !(features & NETIF_F_SG)) {
 		netdev_info(dev, "Dropping NETIF_F_GSO since no SG feature.\n");
-- 
1.7.4


-- 
Ben Hutchings, Senior Software Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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