netdev - [PATCH AUTOSEL 5.12 097/160] net: hsr: don't check sequence number if tag removal is offloaded

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Date:   Tue,  6 Jul 2021 07:17:23 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     George McCollister <george.mccollister@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.12 097/160] net: hsr: don't check sequence number if tag removal is offloaded

From: George McCollister <george.mccollister@...il.com>

[ Upstream commit c2ae34a7deaff463ecafb7db627b77faaca8e159 ]

Don't check the sequence number when deciding when to update time_in in
the node table if tag removal is offloaded since the sequence number is
part of the tag. This fixes a problem where the times in the node table
wouldn't update when 0 appeared to be before or equal to seq_out when
tag removal was offloaded.

Signed-off-by: George McCollister <george.mccollister@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/hsr/hsr_framereg.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c
index bb1351c38397..e31949479305 100644
--- a/net/hsr/hsr_framereg.c
+++ b/net/hsr/hsr_framereg.c
@@ -397,7 +397,8 @@ void hsr_register_frame_in(struct hsr_node *node, struct hsr_port *port,
 	 * ensures entries of restarted nodes gets pruned so that they can
 	 * re-register and resume communications.
 	 */
-	if (seq_nr_before(sequence_nr, node->seq_out[port->type]))
+	if (!(port->dev->features & NETIF_F_HW_HSR_TAG_RM) &&
+	    seq_nr_before(sequence_nr, node->seq_out[port->type]))
 		return;
 
 	node->time_in[port->type] = jiffies;
-- 
2.30.2