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-rw-r--r--net/bridge/br_if.c36
1 files changed, 4 insertions, 32 deletions
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index b40dada002bf..749f0e8f541d 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -349,43 +349,15 @@ int br_min_mtu(const struct net_bridge *br)
349void br_features_recompute(struct net_bridge *br) 349void br_features_recompute(struct net_bridge *br)
350{ 350{
351 struct net_bridge_port *p; 351 struct net_bridge_port *p;
352 unsigned long features, checksum; 352 unsigned long features;
353 353
354 checksum = br->feature_mask & NETIF_F_ALL_CSUM ? NETIF_F_NO_CSUM : 0; 354 features = br->feature_mask;
355 features = br->feature_mask & ~NETIF_F_ALL_CSUM;
356 355
357 list_for_each_entry(p, &br->port_list, list) { 356 list_for_each_entry(p, &br->port_list, list) {
358 unsigned long feature = p->dev->features; 357 features = netdev_compute_features(features, p->dev->features);
359
360 /* if device needs checksumming, downgrade to hw checksumming */
361 if (checksum & NETIF_F_NO_CSUM && !(feature & NETIF_F_NO_CSUM))
362 checksum ^= NETIF_F_NO_CSUM | NETIF_F_HW_CSUM;
363
364 /* if device can't do all checksum, downgrade to ipv4/ipv6 */
365 if (checksum & NETIF_F_HW_CSUM && !(feature & NETIF_F_HW_CSUM))
366 checksum ^= NETIF_F_HW_CSUM
367 | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
368
369 if (checksum & NETIF_F_IPV6_CSUM && !(feature & NETIF_F_IPV6_CSUM))
370 checksum &= ~NETIF_F_IPV6_CSUM;
371
372 if (!(feature & NETIF_F_IP_CSUM))
373 checksum = 0;
374
375 if (feature & NETIF_F_GSO)
376 feature |= NETIF_F_GSO_SOFTWARE;
377 feature |= NETIF_F_GSO;
378
379 features &= feature;
380 } 358 }
381 359
382 if (!(checksum & NETIF_F_ALL_CSUM)) 360 br->dev->features = features;
383 features &= ~NETIF_F_SG;
384 if (!(features & NETIF_F_SG))
385 features &= ~NETIF_F_GSO_MASK;
386
387 br->dev->features = features | checksum | NETIF_F_LLTX |
388 NETIF_F_GSO_ROBUST;
389} 361}
390 362
391/* called with RTNL */ 363/* called with RTNL */