From 31d8b9e099e59f880aa65095951559896d4e20fa Mon Sep 17 00:00:00 2001
From: Ben Hutchings <bhutchings@solarflare.com>
Date: Tue, 12 Apr 2011 14:47:15 +0000
Subject: 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@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/core/dev.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/net/core/dev.c b/net/core/dev.c
index 6401fb588145..c2ac599fa0f6 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");
--
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