net: mctp: remove redundant RTN_UNICAST check

Current mctp_newroute() contains two exactly same check against
rtm->rtm_type

static int mctp_newroute(...)
{
...
    if (rtm->rtm_type != RTN_UNICAST) { // (1)
        NL_SET_ERR_MSG(extack, "rtm_type must be RTN_UNICAST");
        return -EINVAL;
    }
...
    if (rtm->rtm_type != RTN_UNICAST) // (2)
        return -EINVAL;
...
}

This commits removes the (2) check as it is redundant.

Signed-off-by: Lin Ma <linma@zju.edu.cn>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Acked-by: Jeremy Kerr <jk@codeconstruct.com.au>
Link: https://lore.kernel.org/r/20230615152240.1749428-1-linma@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/mctp/route.c b/net/mctp/route.c
index f51a05e..ab62fe4 100644 (file)
--- a/net/mctp/route.c
+++ b/net/mctp/route.c
@@ -1249,9 +1249,6 @@ static int mctp_newroute(struct sk_buff *skb, struct nlmsghdr *nlh,
                        mtu = nla_get_u32(tbx[RTAX_MTU]);
        }
 
-       if (rtm->rtm_type != RTN_UNICAST)
-               return -EINVAL;
-
        rc = mctp_route_add(mdev, daddr_start, rtm->rtm_dst_len, mtu,
                            rtm->rtm_type);
        return rc;