linux-kernel - [PATCH net] net: ti: icssg-prueth: Fix 10M Link issue on AM64x

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Message-ID: <20240823120412.1262536-1-danishanwar@ti.com>
Date: Fri, 23 Aug 2024 17:34:12 +0530
From: MD Danish Anwar <danishanwar@...com>
To: Andrew Lunn <andrew@...n.ch>, Dan Carpenter <dan.carpenter@...aro.org>,
        Diogo Ivo <diogo.ivo@...mens.com>, Jan Kiszka <jan.kiszka@...mens.com>,
        Paolo
 Abeni <pabeni@...hat.com>, Jakub Kicinski <kuba@...nel.org>,
        Eric Dumazet
	<edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>
CC: <linux-kernel@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <srk@...com>,
        Vignesh Raghavendra
	<vigneshr@...com>,
        Roger Quadros <rogerq@...nel.org>, <danishanwar@...com>
Subject: [PATCH net] net: ti: icssg-prueth: Fix 10M Link issue on AM64x

Crash is seen on AM64x 10M link when connecting / disconnecting multiple
times.

The fix for this is to enable quirk_10m_link_issue for AM64x.

Fixes: b256e13378a9 ("net: ti: icssg-prueth: Add AM64x icssg support")
Signed-off-by: MD Danish Anwar <danishanwar@...com>
---
NOTE: If quirk_10m_link_issue is set, the ICSSG driver enables IEP1 which
fixes the 10M link issue.

As per Roger Quadros <rogerq@...nel.org> 's suggestion [1], posting this
as a separate patch.

[1] https://lore.kernel.org/all/cde0064d-83dd-4a7f-8921-053c25aae08b@kernel.org/

 drivers/net/ethernet/ti/icssg/icssg_prueth.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
index 3e51b3a9b0a5..e3451beed323 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c
+++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
@@ -1452,6 +1452,7 @@ static const struct prueth_pdata am654_icssg_pdata = {
 
 static const struct prueth_pdata am64x_icssg_pdata = {
 	.fdqring_mode = K3_RINGACC_RING_MODE_RING,
+	.quirk_10m_link_issue = 1,
 	.switch_mode = 1,
 };
 

base-commit: 82b8000c28b56b014ce52a1f1581bef4af148681
-- 
2.34.1