netdev - [PATCH net-next] net: dsa: felix: set TX flow control according to the phylink_mac_link

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Date:   Tue,  8 Jun 2021 14:16:51 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Michael Walle <michael@...le.cc>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        UNGLinuxDriver@...rochip.com,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: [PATCH net-next] net: dsa: felix: set TX flow control according to the phylink_mac_link_up resolution

From: Vladimir Oltean <vladimir.oltean@....com>

Instead of relying on the static initialization done by ocelot_init_port()
which enables flow control unconditionally, set SYS_PAUSE_CFG_PAUSE_ENA
according to the parameters negotiated by the PHY.

Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 drivers/net/dsa/ocelot/felix.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index ce607fbaaa3a..a2a15919b960 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -940,6 +940,8 @@ static void felix_phylink_mac_link_up(struct dsa_switch *ds, int port,
 
 	ocelot_write_rix(ocelot, 0, ANA_POL_FLOWC, port);
 
+	ocelot_fields_write(ocelot, port, SYS_PAUSE_CFG_PAUSE_ENA, tx_pause);
+
 	/* Undo the effects of felix_phylink_mac_link_down:
 	 * enable MAC module
 	 */
-- 
2.25.1