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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-kernel@vger.kernel.org, Harini Katakam Subject: [PATCH net] net: phy: mscc: fix packet loss due to RGMII delays Date: Tue, 27 Jun 2023 12:11:09 +0300 Message-Id: <20230627091109.3374701-1-vladimir.oltean@nxp.com> X-Mailer: git-send-email 2.34.1 X-ClientProxiedBy: FR0P281CA0173.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:b4::20) To AM0PR04MB6452.eurprd04.prod.outlook.com (2603:10a6:208:16d::21) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM0PR04MB6452:EE_|AM7PR04MB6775:EE_ X-MS-Office365-Filtering-Correlation-Id: 52416892-03b6-4ba0-8b1d-08db76ee790c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM0PR04MB6452.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(4636009)(39860400002)(396003)(376002)(136003)(366004)(346002)(451199021)(83380400001)(52116002)(6486002)(478600001)(54906003)(6666004)(1076003)(66556008)(66946007)(2906002)(6512007)(186003)(6506007)(26005)(66476007)(38350700002)(7416002)(44832011)(316002)(41300700001)(38100700002)(8676002)(5660300002)(8936002)(36756003)(4326008)(6916009)(86362001)(2616005);DIR:OUT;SFP:1101; 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The negative error code from phy_get_internal_delay() does not get overridden with the delay deduced from the phy-mode, and later gets committed to hardware. Also, the rx_delay gets overridden by what should have been the tx_delay. Fixes: dbb050d2bfc8 ("phy: mscc: Add support for RGMII delay configuration") Signed-off-by: Vladimir Oltean Reviewed-by: Harini Katakam --- drivers/net/phy/mscc/mscc_main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/mscc/mscc_main.c b/drivers/net/phy/mscc/mscc_main.c index 669a4a7a28ce..4171f01d34e5 100644 --- a/drivers/net/phy/mscc/mscc_main.c +++ b/drivers/net/phy/mscc/mscc_main.c @@ -563,9 +563,9 @@ static int vsc85xx_update_rgmii_cntl(struct phy_device *phydev, u32 rgmii_cntl, if (tx_delay < 0) { if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID || phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) - rx_delay = RGMII_CLK_DELAY_2_0_NS; + tx_delay = RGMII_CLK_DELAY_2_0_NS; else - rx_delay = RGMII_CLK_DELAY_0_2_NS; + tx_delay = RGMII_CLK_DELAY_0_2_NS; } reg_val |= rx_delay << rgmii_rx_delay_pos;