linux-kernel - [PATCH 5.14 107/151] net: stmmac: trigger PCS EEE to turn off on link down

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Message-Id: <20211011134521.276677112@linuxfoundation.org>
Date:   Mon, 11 Oct 2021 15:46:19 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Wong Vee Khee <vee.khee.wong@...ux.intel.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 107/151] net: stmmac: trigger PCS EEE to turn off on link down

From: Wong Vee Khee <vee.khee.wong@...ux.intel.com>

[ Upstream commit d4aeaed80b0ebb020fadf2073b23462928dbdc17 ]

The current implementation enable PCS EEE feature in the event of link
up, but PCS EEE feature is not disabled on link down.

This patch makes sure PCE EEE feature is disabled on link down.

Fixes: 656ed8b015f1 ("net: stmmac: fix EEE init issue when paired with EEE capable PHYs")
Signed-off-by: Wong Vee Khee <vee.khee.wong@...ux.intel.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 86151a817b79..6b2a5e5769e8 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -477,6 +477,10 @@ bool stmmac_eee_init(struct stmmac_priv *priv)
 			stmmac_lpi_entry_timer_config(priv, 0);
 			del_timer_sync(&priv->eee_ctrl_timer);
 			stmmac_set_eee_timer(priv, priv->hw, 0, eee_tw_timer);
+			if (priv->hw->xpcs)
+				xpcs_config_eee(priv->hw->xpcs,
+						priv->plat->mult_fact_100ns,
+						false);
 		}
 		mutex_unlock(&priv->lock);
 		return false;
@@ -1038,7 +1042,7 @@ static void stmmac_mac_link_down(struct phylink_config *config,
 	stmmac_mac_set(priv, priv->ioaddr, false);
 	priv->eee_active = false;
 	priv->tx_lpi_enabled = false;
-	stmmac_eee_init(priv);
+	priv->eee_enabled = stmmac_eee_init(priv);
 	stmmac_set_eee_pls(priv, priv->hw, false);
 
 	if (priv->dma_cap.fpesel)
-- 
2.33.0