netlink: add netlink_dump_control structure for netlink_dump_start()

Davem considers that the argument list of this interface is getting
out of control. This patch tries to address this issue following
his proposal:

struct netlink_dump_control c = { .dump = dump, .done = done, ... };

netlink_dump_start(..., &c);

Suggested by David S. Miller.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/infiniband/core/netlink.c b/drivers/infiniband/core/netlink.c
index d1c8196d15d7..396e29370304 100644
--- a/drivers/infiniband/core/netlink.c
+++ b/drivers/infiniband/core/netlink.c
@@ -147,9 +147,13 @@ static int ibnl_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
                         if (op < 0 || op >= client->nops ||
                             !client->cb_table[RDMA_NL_GET_OP(op)].dump)
                                 return -EINVAL;
-                        return netlink_dump_start(nls, skb, nlh,
-                                                  client->cb_table[op].dump,
-                                                  NULL, 0);
+
+                        {
+                                struct netlink_dump_control c = {
+                                        .dump = client->cb_table[op].dump,
+                                };
+                                return netlink_dump_start(nls, skb, nlh, &c);
+                        }
                 }
         }