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| author |   Ben Hutchings <bhutchings@solarflare.com> | 2011-04-12 14:38:37 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2011-04-12 19:29:45 -0700 |
| commit | ea2d36883ca8e6caab23b6d15bfa80b1d1d81d2f (patch) | |
| tree | 38818d7330814e276b5e651ec4540ac2eb41d774 /net/core/dev.c | |
| parent | Merge branch 'sfc-2.6.39' of git://git.kernel.org/pub/scm/linux/kernel/git/bwh/sfc-2.6 (diff) | |
| download | linux-dev-ea2d36883ca8e6caab23b6d15bfa80b1d1d81d2f.tar.xz linux-dev-ea2d36883ca8e6caab23b6d15bfa80b1d1d81d2f.zip | |
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/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 6 |
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. */ |