[PATCH net] net: don't warn in inet diag when IPV6 is disabled

[Stephen Hemminger <stephen@networkplumber.org>]

If IPV6 was disabled, then ss command would cause a kernel warning
because the command was attempting to dump IPV6 socke information.
This should not be a warning, instead just return a normal error
code.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=202249
Fixes: 432490f9d455 ("net: ip, diag -- Add diag interface for raw sockets")
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 net/ipv4/raw_diag.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/raw_diag.c b/net/ipv4/raw_diag.c
index 899e34ceb560..045485d39f23 100644
--- a/net/ipv4/raw_diag.c
+++ b/net/ipv4/raw_diag.c
@@ -19,9 +19,11 @@ raw_get_hashinfo(const struct inet_diag_req_v2 *r)
 {
 	if (r->sdiag_family == AF_INET) {
 		return &raw_v4_hashinfo;
-#if IS_ENABLED(CONFIG_IPV6)
 	} else if (r->sdiag_family == AF_INET6) {
+#if IS_ENABLED(CONFIG_IPV6)
 		return &raw_v6_hashinfo;
+#else
+		return ERR_PTR(-EOPNOTSUPP);
 #endif
 	} else {
 		pr_warn_once("Unexpected inet family %d\n",
-- 
2.20.1