| The patch titled: |
| |
| bridge: use rx_handler_data pointer to store net_bridge_port pointer |
| |
| by Jiri Pirko <jpirko@redhat.com> moved the br_ports pointer |
| out of the netdev which older kernels relied on and then added |
| a flag to the netdev to check for it as follows: |
| |
| - dev->br_port) { |
| + (dev->priv_flags & IFF_BRIDGE_PORT)) { |
| |
| So to backport this we instead rely on a br_port_exists() call |
| which compat.git provides and depending on the kernel it will either |
| check for the dev->br_port or the IFF_BRIDGE_PORT flag. A patch |
| to get the blow code merged upstream and to use br_port_exists() |
| everywhere else will be submitted but not sure if it will be |
| accepted. |
| |
| This patch can be removed once we get br_port_exists() accessible |
| to drivers and not just private bridge code. If that patch doesn't |
| get accepted upstream we'l have to carry this patch around for |
| compat-drivers. |
| |
| --- a/net/wireless/util.c |
| +++ b/net/wireless/util.c |
| @@ -816,7 +816,7 @@ int cfg80211_change_iface(struct cfg8021 |
| return -EOPNOTSUPP; |
| |
| /* if it's part of a bridge, reject changing type to station/ibss */ |
| - if ((dev->priv_flags & IFF_BRIDGE_PORT) && |
| + if (br_port_exists(dev) && |
| (ntype == NL80211_IFTYPE_ADHOC || |
| ntype == NL80211_IFTYPE_STATION || |
| ntype == NL80211_IFTYPE_P2P_CLIENT)) |
| --- a/net/wireless/nl80211.c |
| +++ b/net/wireless/nl80211.c |
| @@ -2298,7 +2298,7 @@ static int nl80211_valid_4addr(struct cf |
| enum nl80211_iftype iftype) |
| { |
| if (!use_4addr) { |
| - if (netdev && (netdev->priv_flags & IFF_BRIDGE_PORT)) |
| + if (netdev && br_port_exists(netdev)) |
| return -EBUSY; |
| return 0; |
| } |
