Message ID | eff45ec3108bd37747f2b6e2c3d4ff16c39b0be7.1664475687.git.davthompson@nvidia.com |
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State | New |
Headers | show
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Thu, 29 Sep 2022 11:29:08 -0700 Received: from drhqmail203.nvidia.com (10.126.190.182) by drhqmail202.nvidia.com (10.126.190.181) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.29; Thu, 29 Sep 2022 11:29:07 -0700 Received: from vdi.nvidia.com (10.127.8.14) by mail.nvidia.com (10.126.190.182) with Microsoft SMTP Server id 15.2.986.29 via Frontend Transport; Thu, 29 Sep 2022 11:29:07 -0700 From: David Thompson <davthompson@nvidia.com> To: <kernel-team@lists.ubuntu.com> Subject: [SRU][J:linux-bluefield][PATCH v3 2/2] mlxbf_gige: clear MDIO gateway lock after read Date: Thu, 29 Sep 2022 14:29:05 -0400 Message-ID: <eff45ec3108bd37747f2b6e2c3d4ff16c39b0be7.1664475687.git.davthompson@nvidia.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <cover.1664475687.git.davthompson@nvidia.com> References: <cover.1664475687.git.davthompson@nvidia.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT096:EE_|PH7PR12MB5949:EE_ X-MS-Office365-Filtering-Correlation-Id: ee4d7674-a68a-459d-636e-08daa2488362 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Series |
mlxbf_gige: replace SAUCE patch for "clear MDIO gateway lock"
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diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c index 85155cd9405c..4aeb927c3715 100644 --- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c +++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c @@ -179,6 +179,9 @@ static int mlxbf_gige_mdio_read(struct mii_bus *bus, int phy_add, int phy_reg) /* Only return ad bits of the gw register */ ret &= MLXBF_GIGE_MDIO_GW_AD_MASK; + /* The MDIO lock is set on read. To release it, clear gw register */ + writel(0, priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET); + return ret; } @@ -203,6 +206,9 @@ static int mlxbf_gige_mdio_write(struct mii_bus *bus, int phy_add, temp, !(temp & MLXBF_GIGE_MDIO_GW_BUSY_MASK), 5, 1000000); + /* The MDIO lock is set on read. To release it, clear gw register */ + writel(0, priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET); + return ret; }