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Miller" , Sasha Levin Subject: [PATCH AUTOSEL for 4.9 19/52] net: stmmac: Fix TX timestamp calculation Thread-Topic: [PATCH AUTOSEL for 4.9 19/52] net: stmmac: Fix TX timestamp calculation Thread-Index: AQHTnRlUf/RqCltLOEaZ/aaajg4UDg== Date: Sat, 3 Feb 2018 18:03:43 +0000 Message-ID: <20180203180303.8490-19-alexander.levin@microsoft.com> References: <20180203180303.8490-1-alexander.levin@microsoft.com> In-Reply-To: <20180203180303.8490-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;BL0PR2101MB1091;7:ciRpXo+t7SMDORlaJ7kBIAdLlIZFrQrhtgekClbP2kIZUF0R1YUIFZoyQPPINw3cWTwQR7BAExuJ8ue2nL81vtui33u5W8ozg0P/uly2sL7RTjA6PZO4RbOS0Ny5IHduWT4M9s/GrPF626157pUrA/gxQojAsZ89tfgrVRUrgXQH2EiMOHLCsR03hqtkjsfK/6IHYutSoZhMd1sAmSaDoncmRN3nBKedhqpQqYAtkJkuirveA54lZSwSy/avM6Vv x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 69ddba93-b5b6-4046-820e-08d56b3076dc x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(4534165)(4627221)(201703031133081)(201702281549075)(5600026)(4604075)(3008032)(2017052603307)(7193020);SRVR:BL0PR2101MB1091; x-ms-traffictypediagnostic: BL0PR2101MB1091: x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(89211679590171)(85827821059158); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(61425038)(6040501)(2401047)(5005006)(8121501046)(3002001)(10201501046)(3231101)(2400082)(944501161)(93006095)(93001095)(6055026)(61426038)(61427038)(6041288)(20161123562045)(20161123560045)(20161123558120)(20161123564045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(6072148)(201708071742011);SRVR:BL0PR2101MB1091;BCL:0;PCL:0;RULEID:;SRVR:BL0PR2101MB1091; x-forefront-prvs: 05724A8921 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(396003)(39380400002)(346002)(376002)(366004)(39860400002)(199004)(189003)(86362001)(106356001)(22452003)(4326008)(97736004)(25786009)(2950100002)(5660300001)(2906002)(81156014)(105586002)(3280700002)(8676002)(8936002)(6116002)(68736007)(81166006)(3660700001)(86612001)(39060400002)(2900100001)(107886003)(3846002)(102836004)(1076002)(26005)(6346003)(66066001)(10090500001)(76176011)(6506007)(10290500003)(14454004)(186003)(6486002)(6436002)(53936002)(72206003)(7736002)(316002)(305945005)(99286004)(110136005)(54906003)(36756003)(2501003)(5250100002)(6512007)(478600001)(22906009)(217873001);DIR:OUT;SFP:1102;SCL:1;SRVR:BL0PR2101MB1091;H:BL0PR2101MB1027.namprd21.prod.outlook.com;FPR:;SPF:None;PTR:InfoNoRecords;A:1;MX:1;LANG:en; authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-message-info: svyHkVJHDKLrJ57oFUBVFIRkkFcvLBBVlHyQNj7gW4DYUC04rCeihxLJKR0DrLc5RemZJH+zwKWva+CllOX5XQ== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 69ddba93-b5b6-4046-820e-08d56b3076dc X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Feb 2018 18:03:43.8308 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR2101MB1091 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Fredrik Hallenberg [ Upstream commit 200922c93f008e03ddc804c6dacdf26ca1ba86d7 ] When using GMAC4 the value written in PTP_SSIR should be shifted however the shifted value is also used in subsequent calculations which results in a bad timestamp value. Signed-off-by: Fredrik Hallenberg Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c b/driver= s/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c index 10d6059b2f26..f4074e25fb71 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c @@ -38,6 +38,7 @@ static u32 stmmac_config_sub_second_increment(void __iome= m *ioaddr, { u32 value =3D readl(ioaddr + PTP_TCR); unsigned long data; + u32 reg_value; =20 /* For GMAC3.x, 4.x versions, convert the ptp_clock to nano second * formula =3D (1/ptp_clock) * 1000000000 @@ -54,10 +55,11 @@ static u32 stmmac_config_sub_second_increment(void __io= mem *ioaddr, =20 data &=3D PTP_SSIR_SSINC_MASK; =20 + reg_value =3D data; if (gmac4) - data =3D data << GMAC4_PTP_SSIR_SSINC_SHIFT; + reg_value <<=3D GMAC4_PTP_SSIR_SSINC_SHIFT; =20 - writel(data, ioaddr + PTP_SSIR); + writel(reg_value, ioaddr + PTP_SSIR); =20 return data; } --=20 2.11.0