linux-kernel - [PATCH net] net: dsa: bcm_sf2: force pause link settings

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Message-Id: <20220623030204.1966851-1-f.fainelli@gmail.com>
Date:   Wed, 22 Jun 2022 20:02:04 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     netdev@...r.kernel.org
Cc:     Doug Berger <opendmb@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH net] net: dsa: bcm_sf2: force pause link settings

From: Doug Berger <opendmb@...il.com>

The pause settings reported by the PHY should also be applied to the GMII port
status override otherwise the switch will not generate pause frames towards the
link partner despite the advertisement saying otherwise.

Fixes: 246d7f773c13 ("net: dsa: add Broadcom SF2 switch driver")
Signed-off-by: Doug Berger <opendmb@...il.com>
Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/net/dsa/bcm_sf2.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 87e81c636339..be0edfa093d0 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -878,6 +878,11 @@ static void bcm_sf2_sw_mac_link_up(struct dsa_switch *ds, int port,
 		if (duplex == DUPLEX_FULL)
 			reg |= DUPLX_MODE;
 
+		if (tx_pause)
+			reg |= TXFLOW_CNTL;
+		if (rx_pause)
+			reg |= RXFLOW_CNTL;
+
 		core_writel(priv, reg, offset);
 	}
 
-- 
2.25.1