linux-kernel - [PATCH 5.4 091/100] Revert "net: mvpp2: disable force link UP during port init procedure"

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Message-Id: <20211124115657.793360445@linuxfoundation.org>
Date:   Wed, 24 Nov 2021 12:58:47 +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,
        Jordan Vrtanoski <jordan.vrtanoski@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Stefan Chulski <stefanc@...vell.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 5.4 091/100] Revert "net: mvpp2: disable force link UP during port init procedure"

From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

This reverts commit f595e44b161a3c751943c256b6de80dc57d5fcf8 which is
commit 87508224485323ce2d4e7fb929ec80f51adcc238 upstream.

It causes reported problems so should be removed.

Link: https://lore.kernel.org/r/YZv1SBrYTXmorcLJ@shell.armlinux.org.uk
Reported-by: Jordan Vrtanoski <jordan.vrtanoski@...il.com>
Reported-by: Russell King <linux@...linux.org.uk>
Cc: Stefan Chulski <stefanc@...vell.com>
Cc: Marcin Wojtas <mw@...ihalf.com>
Cc: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c |   14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -4545,7 +4545,7 @@ static int mvpp2_port_init(struct mvpp2_
 	struct mvpp2 *priv = port->priv;
 	struct mvpp2_txq_pcpu *txq_pcpu;
 	unsigned int thread;
-	int queue, err, val;
+	int queue, err;
 
 	/* Checks for hardware constraints */
 	if (port->first_rxq + port->nrxqs >
@@ -4559,18 +4559,6 @@ static int mvpp2_port_init(struct mvpp2_
 	mvpp2_egress_disable(port);
 	mvpp2_port_disable(port);
 
-	if (mvpp2_is_xlg(port->phy_interface)) {
-		val = readl(port->base + MVPP22_XLG_CTRL0_REG);
-		val &= ~MVPP22_XLG_CTRL0_FORCE_LINK_PASS;
-		val |= MVPP22_XLG_CTRL0_FORCE_LINK_DOWN;
-		writel(val, port->base + MVPP22_XLG_CTRL0_REG);
-	} else {
-		val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
-		val &= ~MVPP2_GMAC_FORCE_LINK_PASS;
-		val |= MVPP2_GMAC_FORCE_LINK_DOWN;
-		writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG);
-	}
-
 	port->tx_time_coal = MVPP2_TXDONE_COAL_USEC;
 
 	port->txqs = devm_kcalloc(dev, port->ntxqs, sizeof(*port->txqs),