RDMA/netlink: Simplify the put_msg and put_attr

Reuse standard macros to cancel the netlink message
in case of error.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>

diff --git a/drivers/infiniband/core/netlink.c b/drivers/infiniband/core/netlink.c
index c5ee62a..e2395a1 100644 (file)
--- a/drivers/infiniband/core/netlink.c
+++ b/drivers/infiniband/core/netlink.c
@@ -126,36 +126,21 @@ EXPORT_SYMBOL(rdma_nl_unregister);
 void *ibnl_put_msg(struct sk_buff *skb, struct nlmsghdr **nlh, int seq,
                   int len, int client, int op, int flags)
 {
-       unsigned char *prev_tail;
-
-       prev_tail = skb_tail_pointer(skb);
-       *nlh = nlmsg_put(skb, 0, seq, RDMA_NL_GET_TYPE(client, op),
-                        len, flags);
+       *nlh = nlmsg_put(skb, 0, seq, RDMA_NL_GET_TYPE(client, op), len, flags);
        if (!*nlh)
-               goto out_nlmsg_trim;
-       (*nlh)->nlmsg_len = skb_tail_pointer(skb) - prev_tail;
+               return NULL;
        return nlmsg_data(*nlh);
-
-out_nlmsg_trim:
-       nlmsg_trim(skb, prev_tail);
-       return NULL;
 }
 EXPORT_SYMBOL(ibnl_put_msg);
 
 int ibnl_put_attr(struct sk_buff *skb, struct nlmsghdr *nlh,
                  int len, void *data, int type)
 {
-       unsigned char *prev_tail;
-
-       prev_tail = skb_tail_pointer(skb);
-       if (nla_put(skb, type, len, data))
-               goto nla_put_failure;
-       nlh->nlmsg_len += skb_tail_pointer(skb) - prev_tail;
+       if (nla_put(skb, type, len, data)) {
+               nlmsg_cancel(skb, nlh);
+               return -EMSGSIZE;
+       }
        return 0;
-
-nla_put_failure:
-       nlmsg_trim(skb, prev_tail - nlh->nlmsg_len);
-       return -EMSGSIZE;
 }
 EXPORT_SYMBOL(ibnl_put_attr);