SUNRPC: Don't display zero scope IDs

A zero scope ID means that it wasn't set, so we don't need to append
it to presentation format addresses.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/sunrpc/addr.c b/net/sunrpc/addr.c
index 0756c5da12f4..f845d9d72f73 100644
--- a/net/sunrpc/addr.c
+++ b/net/sunrpc/addr.c
@@ -73,6 +73,8 @@ static size_t rpc_ntop6(const struct sockaddr *sap,
 
         if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
                 return len;
+        if (sin6->sin6_scope_id == 0)
+                return len;
 
         rc = snprintf(scopebuf, sizeof(scopebuf), "%c%u",
                         IPV6_SCOPE_DELIMITER, sin6->sin6_scope_id);