[DECNET]: dn_nl_deladdr() almost always returns no error

As far as I see from the err variable initialization
the dn_nl_deladdr() routine was designed to report errors
like "EADDRNOTAVAIL" and probaby "ENODEV".

But the code sets this err to 0 after the first nlmsg_parse
and goes on, returning this 0 in any case.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
index 66e266f..3bc82dc 100644 (file)
--- a/net/decnet/dn_dev.c
+++ b/net/decnet/dn_dev.c
@@ -651,16 +651,18 @@ static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
        struct dn_dev *dn_db;
        struct ifaddrmsg *ifm;
        struct dn_ifaddr *ifa, **ifap;
-       int err = -EADDRNOTAVAIL;
+       int err;
 
        err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
        if (err < 0)
                goto errout;
 
+       err = -ENODEV;
        ifm = nlmsg_data(nlh);
        if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
                goto errout;
 
+       err = -EADDRNOTAVAIL;
        for (ifap = &dn_db->ifa_list; (ifa = *ifap); ifap = &ifa->ifa_next) {
                if (tb[IFA_LOCAL] &&
                    nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))