linux-kernel - [PATCH 5.16 0291/1039] net: dsa: hellcreek: Allow PTP P2P measurements on blocked ports

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Date:   Mon, 24 Jan 2022 19:34:40 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Kurt Kanzenbach <kurt@...utronix.de>,
        Vladimir Oltean <olteanv@...il.com>,
        Richard Cochran <richardcochran@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 0291/1039] net: dsa: hellcreek: Allow PTP P2P measurements on blocked ports

From: Kurt Kanzenbach <kurt@...utronix.de>

[ Upstream commit cad1798d2d0811ded37d1e946c6796102e58013b ]

Allow PTP peer delay measurements on blocked ports by STP. In case of topology
changes the PTP stack can directly start with the correct delays.

Fixes: ddd56dfe52c9 ("net: dsa: hellcreek: Add PTP clock support")
Signed-off-by: Kurt Kanzenbach <kurt@...utronix.de>
Reviewed-by: Vladimir Oltean <olteanv@...il.com>
Acked-by: Richard Cochran <richardcochran@...il.com>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/dsa/hirschmann/hellcreek.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
index b488990b5b06e..40ce8c0c9167a 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.c
+++ b/drivers/net/dsa/hirschmann/hellcreek.c
@@ -1069,7 +1069,7 @@ static int hellcreek_setup_fdb(struct hellcreek *hellcreek)
 		.portmask     = 0x03,	/* Management ports */
 		.age	      = 0,
 		.is_obt	      = 0,
-		.pass_blocked = 0,
+		.pass_blocked = 1,
 		.is_static    = 1,
 		.reprio_tc    = 6,	/* TC: 6 as per IEEE 802.1AS */
 		.reprio_en    = 1,
-- 
2.34.1