linux-kernel - [PATCH] net: ethernet: ti: am65-cpsw: rx_pause/tx

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Message-ID: <20231031122005.13368-1-rwahl@gmx.de>
Date:   Tue, 31 Oct 2023 13:20:05 +0100
From:   Ronald Wahl <rwahl@....de>
To:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Cc:     Grygorii Strashko <grygorii.strashko@...com>,
        Dan Carpenter <dan.carpenter@...aro.org>,
        Siddharth Vadapalli <s-vadapalli@...com>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Roger Quadros <rogerq@...nel.org>,
        Ronald Wahl <ronald.wahl@...itan.com>
Subject: [PATCH] net: ethernet: ti: am65-cpsw: rx_pause/tx_pause controls wrong direction

From: Ronald Wahl <ronald.wahl@...itan.com>

The rx_pause flag says that whether we support receiving Pause frames.
When a Pause frame is received TX is delayed for some time. This is TX
flow control. In the same manner tx_pause is actually RX flow control.

Signed-off-by: Ronald Wahl <ronald.wahl@...itan.com>
---
 drivers/net/ethernet/ti/am65-cpsw-nuss.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index 24120605502f..ece9f8df98ae 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -1588,10 +1588,10 @@ static void am65_cpsw_nuss_mac_link_up(struct phylink_config *config, struct phy

 	/* rx_pause/tx_pause */
 	if (rx_pause)
-		mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
+		mac_control |= CPSW_SL_CTL_TX_FLOW_EN;

 	if (tx_pause)
-		mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
+		mac_control |= CPSW_SL_CTL_RX_FLOW_EN;

 	cpsw_sl_ctl_set(port->slave.mac_sl, mac_control);

--
2.41.0