packet: propagate sock_cmsg_send() error

sock_cmsg_send() can return different error codes and not only
-EINVAL, and we should properly propagate them.

Fixes: c14ac9451c34 ("sock: enable timestamping using control messages")
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 53e87ce..b43c401 100644 (file)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1930,10 +1930,8 @@ retry:
        sockc.tsflags = sk->sk_tsflags;
        if (msg->msg_controllen) {
                err = sock_cmsg_send(sk, msg, &sockc);
-               if (unlikely(err)) {
-                       err = -EINVAL;
+               if (unlikely(err))
                        goto out_unlock;
-               }
        }
 
        skb->protocol = proto;