From 678dfd5280341d877ca646499bfdc82a3d8b4356 Mon Sep 17 00:00:00 2001
From: Gerhard Engleder <gerhard@engleder-embedded.com>
Date: Sun, 30 Jan 2022 10:54:22 +0100
Subject: [PATCH] selftests/net: timestamping: Fix bind_phc check
Git-commit: 678dfd5280341d877ca646499bfdc82a3d8b4356
Patch-mainline: v5.18-rc1
References: git-fixes

timestamping checks socket options during initialisation. For the field
bind_phc of the socket option SO_TIMESTAMPING it expects the value -1 if
PHC is not bound. Actually the value of bind_phc is 0 if PHC is not
bound. This results in the following output:

Siocshwtstamp: tx_type 0 requested, got 0; rx_filter 0 requested, got 0
SO_TIMESTAMP 0
SO_TIMESTAMPNS 0
SO_TIMESTAMPING flags 0, bind phc 0
   not expected, flags 0, bind phc -1

This is fixed by setting default value and expected value of bind_phc to
0.

Fixes: 2214d7032479 ("selftests/net: timestamping: support binding PHC")
Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 tools/testing/selftests/net/timestamping.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/net/timestamping.c b/tools/testing/selftests/net/timestamping.c
index aee631c5284e..044bc0e9ed81 100644
--- a/tools/testing/selftests/net/timestamping.c
+++ b/tools/testing/selftests/net/timestamping.c
@@ -325,8 +325,8 @@ int main(int argc, char **argv)
 	struct ifreq device;
 	struct ifreq hwtstamp;
 	struct hwtstamp_config hwconfig, hwconfig_requested;
-	struct so_timestamping so_timestamping_get = { 0, -1 };
-	struct so_timestamping so_timestamping = { 0, -1 };
+	struct so_timestamping so_timestamping_get = { 0, 0 };
+	struct so_timestamping so_timestamping = { 0, 0 };
 	struct sockaddr_in addr;
 	struct ip_mreq imr;
 	struct in_addr iaddr;
-- 
2.35.3