linux-kernel - [PATCH 5.4 340/434] net: ethernet: ti: ale: clean ale tbl on init and intf restart

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Message-Id: <20191229172724.551875854@linuxfoundation.org>
Date:   Sun, 29 Dec 2019 18:26:33 +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,
        Grygorii Strashko <grygorii.strashko@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 340/434] net: ethernet: ti: ale: clean ale tbl on init and intf restart

From: Grygorii Strashko <grygorii.strashko@...com>

[ Upstream commit 7fe579dfb90fcdf0c7722f33c772d5f0d1bc7cb6 ]

Clean CPSW ALE on init and intf restart (up/down) to avoid reading obsolete
or garbage entries from ALE table.

Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/ti/cpsw_ale.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c
index 84025dcc78d5..e7c24396933e 100644
--- a/drivers/net/ethernet/ti/cpsw_ale.c
+++ b/drivers/net/ethernet/ti/cpsw_ale.c
@@ -779,6 +779,7 @@ void cpsw_ale_start(struct cpsw_ale *ale)
 void cpsw_ale_stop(struct cpsw_ale *ale)
 {
 	del_timer_sync(&ale->timer);
+	cpsw_ale_control_set(ale, 0, ALE_CLEAR, 1);
 	cpsw_ale_control_set(ale, 0, ALE_ENABLE, 0);
 }
 
@@ -862,6 +863,7 @@ struct cpsw_ale *cpsw_ale_create(struct cpsw_ale_params *params)
 					ALE_UNKNOWNVLAN_FORCE_UNTAG_EGRESS;
 	}
 
+	cpsw_ale_control_set(ale, 0, ALE_CLEAR, 1);
 	return ale;
 }
 
-- 
2.20.1