[NET]: Fix multicast device ioctl checks

SIOCADDMULTI/SIOCDELMULTI check whether the driver has a set_multicast_list
method to determine whether it supports multicast. Drivers implementing
secondary unicast support use set_rx_mode however.

Check for both dev->set_multicast_mode and dev->set_rx_mode to determine
multicast capabilities.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/dev.c b/net/core/dev.c
index fcdf03c..460e7f9 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3329,7 +3329,7 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
                        return -EOPNOTSUPP;
 
                case SIOCADDMULTI:
-                       if (!dev->set_multicast_list ||
+                       if ((!dev->set_multicast_list && !dev->set_rx_mode) ||
                            ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
                                return -EINVAL;
                        if (!netif_device_present(dev))
@@ -3338,7 +3338,7 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
                                          dev->addr_len, 1);
 
                case SIOCDELMULTI:
-                       if (!dev->set_multicast_list ||
+                       if ((!dev->set_multicast_list && !dev->set_rx_mode) ||
                            ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
                                return -EINVAL;
                        if (!netif_device_present(dev))