[IPV4] Fix EPROTONOSUPPORT error in inet_create
There is a coding error in inet_create that causes it to always return
ESOCKTNOSUPPORT. It should return EPROTONOSUPPORT when there are
protocols registered for a given socket type but none of them match
the requested protocol.
This is based on a patch by Jayachandran C.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index eaa150c..d368cf2 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -228,13 +228,14 @@
unsigned char answer_flags;
char answer_no_check;
int try_loading_module = 0;
- int err = -ESOCKTNOSUPPORT;
+ int err;
sock->state = SS_UNCONNECTED;
/* Look for the requested type/protocol pair. */
answer = NULL;
lookup_protocol:
+ err = -ESOCKTNOSUPPORT;
rcu_read_lock();
list_for_each_rcu(p, &inetsw[sock->type]) {
answer = list_entry(p, struct inet_protosw, list);
@@ -252,6 +253,7 @@
if (IPPROTO_IP == answer->protocol)
break;
}
+ err = -EPROTONOSUPPORT;
answer = NULL;
}
@@ -280,9 +282,6 @@
err = -EPERM;
if (answer->capability > 0 && !capable(answer->capability))
goto out_rcu_unlock;
- err = -EPROTONOSUPPORT;
- if (!protocol)
- goto out_rcu_unlock;
sock->ops = answer->ops;
answer_prot = answer->prot;