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authorHerbert Xu <herbert@gondor.apana.org.au>2006-06-18 09:06:45 +0400
committerDavid S. Miller <davem@davemloft.net>2006-06-18 09:06:45 +0400
commit2c6cc0d8539f121c3c75aa3641c19b67e8723379 (patch)
treedbc8cc8a5b3fd83734dc6b80b614136e663a017e /net/bridge/br_if.c
parent8648b3053bff39a7ee4c711d74268079c928a657 (diff)
downloadlinux-2c6cc0d8539f121c3c75aa3641c19b67e8723379.tar.xz
[BRIDGE]: Add support for NETIF_F_HW_CSUM devices
As it is the bridge will only ever declare NETIF_F_IP_CSUM even if all its constituent devices support NETIF_F_HW_CSUM. This patch fixes this by supporting the first one out of NETIF_F_NO_CSUM, NETIF_F_HW_CSUM, and NETIF_F_IP_CSUM that is supported by all constituent devices. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_if.c')
-rw-r--r--net/bridge/br_if.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 90c95f59dc82..fdec773f5b52 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -372,11 +372,17 @@ void br_features_recompute(struct net_bridge *br)
struct net_bridge_port *p;
unsigned long features, checksum;
- features = br->feature_mask &~ NETIF_F_IP_CSUM;
- checksum = br->feature_mask & NETIF_F_IP_CSUM;
+ checksum = br->feature_mask & NETIF_F_ALL_CSUM ? NETIF_F_NO_CSUM : 0;
+ features = br->feature_mask & ~NETIF_F_ALL_CSUM;
list_for_each_entry(p, &br->port_list, list) {
- if (!(p->dev->features & NETIF_F_ALL_CSUM))
+ if (checksum & NETIF_F_NO_CSUM &&
+ !(p->dev->features & NETIF_F_NO_CSUM))
+ checksum ^= NETIF_F_NO_CSUM | NETIF_F_HW_CSUM;
+ if (checksum & NETIF_F_HW_CSUM &&
+ !(p->dev->features & NETIF_F_HW_CSUM))
+ checksum ^= NETIF_F_HW_CSUM | NETIF_F_IP_CSUM;
+ if (!(p->dev->features & NETIF_F_IP_CSUM))
checksum = 0;
features &= p->dev->features;
}