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Sun, 8 Apr 2018 20:30:21 -0400 From: Sasha Levin To: "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" CC: Doug Berger , Tejun Heo , Sasha Levin Subject: [PATCH AUTOSEL for 4.9 126/293] libata: Add the AHCI_HFLAG_YES_ALPM flag Thread-Topic: [PATCH AUTOSEL for 4.9 126/293] libata: Add the AHCI_HFLAG_YES_ALPM flag Thread-Index: AQHTz5kgArvDk9X/W0ajqUJ0CZg0OA== Date: Mon, 9 Apr 2018 00:24:31 +0000 Message-ID: <20180409002239.163177-126-alexander.levin@microsoft.com> References: <20180409002239.163177-1-alexander.levin@microsoft.com> In-Reply-To: <20180409002239.163177-1-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;DM5PR2101MB1032;7:svu7VaIlzP6iFoOVwBAU+2mf3VhrycM4S7KgX65GhelCG7I15IerQUhF4X0upELqMgUBiPs/wK0X9YI2zkFWoWiYkA3T+48EQ1Qhkx7myr0DIsP4x+ixHt5yNqgg6g8uEKPRC5yrNO2SIChNbbBcP5Zh1IIeBEX6yQ5J2eXqWJAuDMA//v1tIynmwqd1HJQcYQlVUMuxkZQLL6efRndFaTXKt5U3kMJT35En/cPr+5myLl/ITlwb1QcEUdIpnvBY;20:qs2f+yeoYBupCrD3oNtJG46ByZpWcmjteOBm1erA9VQmE1lVqMgYProbSMh7hPFIhRDtZaOJcWCaPzxUWNG3w3hYDCB5U3K1NVs9lFKPVaoDr6ZD4Gf5eVjcewIxdEhEArAMAsA1hNu9cAKYsSiJT/8k6fZr/Y///XGxyOlA1us= x-ms-office365-filtering-ht: Tenant X-MS-Office365-Filtering-Correlation-Id: 97b20baa-9aa0-4521-8657-08d59db11152 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4604075)(3008032)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB1032; 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x-microsoft-antispam-message-info: Nbi+ao9TwDwE+85HumsnMWY8+HSU+5NRLP0YuRfxRrkE0kwqu4hYAYkcNtV6QZd4jF3Lruho3OOM1hFYxja6XA+R8gYWBIQwyFHu1+GTtTXAHxthYKJaBcQAuvO2xBSOLuSDDpfDu+MFsmpBx1ErxIwBf7UP/L7tJiiUx4soUzmjHgXF7LmDBSUbRo0hvO7MnjApZnVK5dDKz4oJNBHdugIX86mhY8yy7LcaheCe4iJgT6D4LY6XWfMX2jmdAtKPLNH4Lv1JP43usVfpq+kiVVFIbHaZO3mwmjkQ/GcPKm6qSGfBvDt5w+0uOjHLM2U8xTeYZ26RlD/QM4PeIsfzPXYR7ukeW0JBVlnIIgFo1u2ajl5hpUwEMLmgj+kNxK3UhQY62C23M8cIp38wA+PjYM4o+8DLlW7SGsxnvJ7TqMU= 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: 97b20baa-9aa0-4521-8657-08d59db11152 X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Apr 2018 00:24:31.3000 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB1032 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: Doug Berger [ Upstream commit ef0da1bf767d9e557c6375c7066717eead54cb15 ] Some hardware is capable of supporting Aggresive Link Power Management even though it is not indicated by the Host Capability register. This commit adds the AHCI_HFLAG_YES_ALPM flag to the AHCI library to allow indication of this quirk when the Host Capability register is Read Only and therefore cannot be changed. Signed-off-by: Doug Berger Signed-off-by: Tejun Heo Signed-off-by: Sasha Levin --- drivers/ata/ahci.h | 1 + drivers/ata/libahci.c | 5 +++++ 2 files changed, 6 insertions(+) diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h index 0cc08f892fea..bd9ba1640b56 100644 --- a/drivers/ata/ahci.h +++ b/drivers/ata/ahci.h @@ -248,6 +248,7 @@ enum { AHCI_HFLAG_MULTI_MSI =3D 0, #endif AHCI_HFLAG_WAKE_BEFORE_STOP =3D (1 << 22), /* wake before DMA stop */ + AHCI_HFLAG_YES_ALPM =3D (1 << 23), /* force ALPM cap on */ =20 /* ap->flags bits */ =20 diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index 0d028ead99e8..e9eb98a33467 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c @@ -503,6 +503,11 @@ void ahci_save_initial_config(struct device *dev, stru= ct ahci_host_priv *hpriv) cap &=3D ~HOST_CAP_FBS; } =20 + if (!(cap & HOST_CAP_ALPM) && (hpriv->flags & AHCI_HFLAG_YES_ALPM)) { + dev_info(dev, "controller can do ALPM, turning on CAP_ALPM\n"); + cap |=3D HOST_CAP_ALPM; + } + if (hpriv->force_port_map && port_map !=3D hpriv->force_port_map) { dev_info(dev, "forcing port_map 0x%x -> 0x%x\n", port_map, hpriv->force_port_map); --=20 2.15.1