netdev - [PATCH stable 4.19] net: dsa: bcm_sf2: force pause link settings

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Message-Id: <20220704153510.3859649-3-f.fainelli@gmail.com>
Date:   Mon,  4 Jul 2022 08:35:09 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     stable@...r.kernel.org
Cc:     Doug Berger <opendmb@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org,
        olteanv@...il.com, andrew@...n.ch
Subject: [PATCH stable 4.19] net: dsa: bcm_sf2: force pause link settings

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

commit 7c97bc0128b2eecc703106112679a69d446d1a12 upstream

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 3deda0321c00..8a67c6f76e3b 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -599,6 +599,11 @@ static void bcm_sf2_sw_mac_config(struct dsa_switch *ds, int port,
 		reg |= LINK_STS;
 	if (state->duplex == DUPLEX_FULL)
 		reg |= DUPLX_MODE;
+	if (state->pause & MLO_PAUSE_TXRX_MASK) {
+		if (state->pause & MLO_PAUSE_TX)
+			reg |= TXFLOW_CNTL;
+		reg |= RXFLOW_CNTL;
+	}
 
 	core_writel(priv, reg, offset);
 }
-- 
2.25.1