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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: CO1PR11MB4771.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2c2f8307-752b-4cbd-14ad-08d9becf6ecc X-MS-Exchange-CrossTenant-originalarrivaltime: 14 Dec 2021 07:00:37.5016 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: kER846U2wjpLmWafy/cDdFfCIbnFkWmQxhUGn9bOBt4ScgRoP2v5BdiVDScPBcSRJfuwj+1dA34saO/qLO1IzrgBSywpiFu8fxl4Uzzcdl+O8jsQjCuU/QfXz9hBG+5t X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW5PR11MB5881 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Oleksij, "net: phy: genphy_loopback: add link speed configuration" patch causes Marv= ell 88E1510 PHY not able to perform PHY loopback using ethtool command (eth= tool -t eth0 offline). Below is the error message:=20 "Marvell 88E1510 stmmac-3:01: genphy_loopback failed: -110"=20 Tested on Intel Elkhart Lake platform (Synopsys Designware QoS MAC and Marv= ell88E1510 PHY). Kernel version is 5.15.x. Reverting the patch able to fix the issue. Thank you. Regards, Athari