Hi Sridhar, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Sridhar-Samudrala/Enable-virtio_net-to-act-as-a-standby-for-a-passthru-device/20180427-183842 smatch warnings: net/core/net_failover.c:229 net_failover_change_mtu() error: we previously assumed 'primary_dev' could be null (see line 219) net/core/net_failover.c:279 net_failover_vlan_rx_add_vid() error: we previously assumed 'primary_dev' could be null (see line 269) # https://github.com/0day-ci/linux/commit/5a5f2e3efcb699867db79543dfebe764927b9c93 git remote add linux-review https://github.com/0day-ci/linux git remote update linux-review git checkout 5a5f2e3efcb699867db79543dfebe764927b9c93 vim +/primary_dev +229 net/core/net_failover.c 5a5f2e3e Sridhar Samudrala 2018-04-25 211 5a5f2e3e Sridhar Samudrala 2018-04-25 212 static int net_failover_change_mtu(struct net_device *dev, int new_mtu) 5a5f2e3e Sridhar Samudrala 2018-04-25 213 { 5a5f2e3e Sridhar Samudrala 2018-04-25 214 struct net_failover_info *nfo_info = netdev_priv(dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 215 struct net_device *primary_dev, *standby_dev; 5a5f2e3e Sridhar Samudrala 2018-04-25 216 int ret = 0; 5a5f2e3e Sridhar Samudrala 2018-04-25 217 5a5f2e3e Sridhar Samudrala 2018-04-25 218 primary_dev = rcu_dereference(nfo_info->primary_dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 @219 if (primary_dev) { 5a5f2e3e Sridhar Samudrala 2018-04-25 220 ret = dev_set_mtu(primary_dev, new_mtu); 5a5f2e3e Sridhar Samudrala 2018-04-25 221 if (ret) 5a5f2e3e Sridhar Samudrala 2018-04-25 222 return ret; 5a5f2e3e Sridhar Samudrala 2018-04-25 223 } 5a5f2e3e Sridhar Samudrala 2018-04-25 224 5a5f2e3e Sridhar Samudrala 2018-04-25 225 standby_dev = rcu_dereference(nfo_info->standby_dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 226 if (standby_dev) { 5a5f2e3e Sridhar Samudrala 2018-04-25 227 ret = dev_set_mtu(standby_dev, new_mtu); 5a5f2e3e Sridhar Samudrala 2018-04-25 228 if (ret) { 5a5f2e3e Sridhar Samudrala 2018-04-25 @229 dev_set_mtu(primary_dev, dev->mtu); 5a5f2e3e Sridhar Samudrala 2018-04-25 230 return ret; 5a5f2e3e Sridhar Samudrala 2018-04-25 231 } 5a5f2e3e Sridhar Samudrala 2018-04-25 232 } 5a5f2e3e Sridhar Samudrala 2018-04-25 233 5a5f2e3e Sridhar Samudrala 2018-04-25 234 dev->mtu = new_mtu; 5a5f2e3e Sridhar Samudrala 2018-04-25 235 5a5f2e3e Sridhar Samudrala 2018-04-25 236 return 0; 5a5f2e3e Sridhar Samudrala 2018-04-25 237 } 5a5f2e3e Sridhar Samudrala 2018-04-25 238 5a5f2e3e Sridhar Samudrala 2018-04-25 239 static void net_failover_set_rx_mode(struct net_device *dev) 5a5f2e3e Sridhar Samudrala 2018-04-25 240 { 5a5f2e3e Sridhar Samudrala 2018-04-25 241 struct net_failover_info *nfo_info = netdev_priv(dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 242 struct net_device *slave_dev; 5a5f2e3e Sridhar Samudrala 2018-04-25 243 5a5f2e3e Sridhar Samudrala 2018-04-25 244 rcu_read_lock(); 5a5f2e3e Sridhar Samudrala 2018-04-25 245 5a5f2e3e Sridhar Samudrala 2018-04-25 246 slave_dev = rcu_dereference(nfo_info->primary_dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 247 if (slave_dev) { 5a5f2e3e Sridhar Samudrala 2018-04-25 248 dev_uc_sync_multiple(slave_dev, dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 249 dev_mc_sync_multiple(slave_dev, dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 250 } 5a5f2e3e Sridhar Samudrala 2018-04-25 251 5a5f2e3e Sridhar Samudrala 2018-04-25 252 slave_dev = rcu_dereference(nfo_info->standby_dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 253 if (slave_dev) { 5a5f2e3e Sridhar Samudrala 2018-04-25 254 dev_uc_sync_multiple(slave_dev, dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 255 dev_mc_sync_multiple(slave_dev, dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 256 } 5a5f2e3e Sridhar Samudrala 2018-04-25 257 5a5f2e3e Sridhar Samudrala 2018-04-25 258 rcu_read_unlock(); 5a5f2e3e Sridhar Samudrala 2018-04-25 259 } 5a5f2e3e Sridhar Samudrala 2018-04-25 260 5a5f2e3e Sridhar Samudrala 2018-04-25 261 static int net_failover_vlan_rx_add_vid(struct net_device *dev, __be16 proto, 5a5f2e3e Sridhar Samudrala 2018-04-25 262 u16 vid) 5a5f2e3e Sridhar Samudrala 2018-04-25 263 { 5a5f2e3e Sridhar Samudrala 2018-04-25 264 struct net_failover_info *nfo_info = netdev_priv(dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 265 struct net_device *primary_dev, *standby_dev; 5a5f2e3e Sridhar Samudrala 2018-04-25 266 int ret = 0; 5a5f2e3e Sridhar Samudrala 2018-04-25 267 5a5f2e3e Sridhar Samudrala 2018-04-25 268 primary_dev = rcu_dereference(nfo_info->primary_dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 @269 if (primary_dev) { 5a5f2e3e Sridhar Samudrala 2018-04-25 270 ret = vlan_vid_add(primary_dev, proto, vid); 5a5f2e3e Sridhar Samudrala 2018-04-25 271 if (ret) 5a5f2e3e Sridhar Samudrala 2018-04-25 272 return ret; 5a5f2e3e Sridhar Samudrala 2018-04-25 273 } 5a5f2e3e Sridhar Samudrala 2018-04-25 274 5a5f2e3e Sridhar Samudrala 2018-04-25 275 standby_dev = rcu_dereference(nfo_info->standby_dev); 5a5f2e3e Sridhar Samudrala 2018-04-25 276 if (standby_dev) { 5a5f2e3e Sridhar Samudrala 2018-04-25 277 ret = vlan_vid_add(standby_dev, proto, vid); 5a5f2e3e Sridhar Samudrala 2018-04-25 278 if (ret) 5a5f2e3e Sridhar Samudrala 2018-04-25 @279 vlan_vid_del(primary_dev, proto, vid); 5a5f2e3e Sridhar Samudrala 2018-04-25 280 } 5a5f2e3e Sridhar Samudrala 2018-04-25 281 5a5f2e3e Sridhar Samudrala 2018-04-25 282 return ret; 5a5f2e3e Sridhar Samudrala 2018-04-25 283 } 5a5f2e3e Sridhar Samudrala 2018-04-25 284 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
