On Sun, Dec 31, 2017 at 01:23:08PM -0700, Jason Gunthorpe wrote: > On Sun, Dec 31, 2017 at 01:16:23PM +0200, Denis Drozdov wrote: > > IPoIB netlink support was broken by commit cd565b4b51e5 > > ("IB/IPoIB: Support acceleration options callbacks"), > > that added flow which allocates netdev rdma structures > > after netlink object is already created. Such situation leads > > to crash in __ipoib_device_add, once trying to reuse netlink > > device. > > This commit restores the netlink support. > > > > Fixes: cd565b4b51e5 ("IB/IPoIB: Support acceleration options callbacks") > > Reviewed-by: Erez Shitrit > > Reviewed-by: Leon Romanovsky > > Reviewed-by: Saeed Mahameed > > Signed-off-by: Denis Drozdov > > drivers/infiniband/ulp/ipoib/ipoib.h | 2 ++ > > drivers/infiniband/ulp/ipoib/ipoib_main.c | 23 +++++++++-------- > > drivers/infiniband/ulp/ipoib/ipoib_netlink.c | 38 +++++++++++++++++++++++++--- > > drivers/infiniband/ulp/ipoib/ipoib_vlan.c | 20 ++++----------- > > 4 files changed, 54 insertions(+), 29 deletions(-) > > I assume this is going through DaveM's tree? Yes, it was our plan because of the first patch in this series. > In which case for the drivers/infiniband part: > > Acked-by: Jason Gunthorpe > > > @@ -131,11 +157,15 @@ static int ipoib_new_child_link(struct net *src_net, struct net_device *dev, > > */ > > child_pkey |= 0x8000; > > > > - err = __ipoib_vlan_add(ppriv, ipoib_priv(dev), > > - child_pkey, IPOIB_RTNL_CHILD); > > + down_write(&ppriv->vlan_rwsem); > > + > > + priv = ipoib_priv(dev); > > + err = __ipoib_vlan_add(ppriv, priv, child_pkey, IPOIB_RTNL_CHILD); > > + up_write(&ppriv->vlan_rwsem); > > This looks like a necessary and correct change, but does it need to be > a seperate bug fix commit? It can. > > Jason > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org > More majordomo info at http://vger.kernel.org/majordomo-info.html