path: root/net
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authorBen Hutchings <bhutchings@solarflare.com>2011-04-12 14:38:37 +0000
committerDavid S. Miller <davem@davemloft.net>2011-04-12 19:29:45 -0700
commitea2d36883ca8e6caab23b6d15bfa80b1d1d81d2f (patch)
tree38818d7330814e276b5e651ec4540ac2eb41d774 /net
parentc0212fb146bf3e77cd6b28a06b8f503e2974fdc8 (diff)
net: Disable all TSO features when SG is disabled
The feature flags NETIF_F_TSO and NETIF_F_TSO6 independently enable TSO for IPv4 and IPv6 respectively. However, the test in netdev_fix_features() and its predecessor functions was never updated to check for NETIF_F_TSO6, possibly because it was originally proposed that TSO for IPv6 would be dependent on both feature flags. Now that these feature flags can be changed independently from user-space and we depend on netdev_fix_features() to fix invalid feature combinations, it's important to disable them both if scatter-gather is disabled. Also disable NETIF_F_TSO_ECN so user-space sees all TSO features as disabled. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
1 files changed, 3 insertions, 3 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 956d3b006e8b..6401fb588145 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5203,9 +5203,9 @@ u32 netdev_fix_features(struct net_device *dev, u32 features)
/* TSO requires that SG is present as well. */
- if ((features & NETIF_F_TSO) && !(features & NETIF_F_SG)) {
- netdev_info(dev, "Dropping NETIF_F_TSO since no SG feature.\n");
- features &= ~NETIF_F_TSO;
+ if ((features & NETIF_F_ALL_TSO) && !(features & NETIF_F_SG)) {
+ netdev_info(dev, "Dropping TSO features since no SG feature.\n");
+ features &= ~NETIF_F_ALL_TSO;
/* Software GSO depends on SG. */

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