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Tue, 29 Dec 2020 03:36:05 +0000 Date: Tue, 29 Dec 2020 11:35:56 +0800 From: Jisheng Zhang To: Jingoo Han , Gustavo Pimentel , Lorenzo Pieralisi , Rob Herring , Bjorn Helgaas Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2] PCI: dwc: Fix MSI not work after resume Message-ID: <20201229113556.5dd4610c@xhacker.debian> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Originating-IP: [192.147.44.204] X-ClientProxiedBy: BYAPR04CA0029.namprd04.prod.outlook.com (2603:10b6:a03:40::42) To BN8PR03MB4724.namprd03.prod.outlook.com (2603:10b6:408:96::21) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from xhacker.debian (192.147.44.204) by BYAPR04CA0029.namprd04.prod.outlook.com (2603:10b6:a03:40::42) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3700.27 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?GlrbuYQawiUG1i3D+h3ToMvcLmQ5MHOP4czzn28bimbZ/uHqwwInycqSpmc5?= =?us-ascii?Q?4ucT7pD9WUEt1Pmy9hMJXeIob7tqwL8VVVkIeMJ4vw1RsfqHzIN+nFsyahrO?= =?us-ascii?Q?/9LeHyV1O4Byap28lMWvArJZYcWX9+QFKkLqiKR3xamlaqUh1d9gtt1cBXPA?= =?us-ascii?Q?GeYqx8jlZ0xDPPSzyDzFAYbMfWhMAytmF2UjJZ3cePsqhE/wiKfp+wUUm+tU?= =?us-ascii?Q?s4wQc3bX7rzkz0Khwcq/IAosmvWEs+I1G3vMBofrMhknJ2Us322kJPhyUmJ2?= =?us-ascii?Q?kXEPnVmxTwX7mSPKlKvq8hNsGP+8RoZ6j7UYPurhRzOreMAaC+zCZATGgxxV?= =?us-ascii?Q?Wzuk7W2C2QuQMq+TMJtk9ZVRNkqivO4xq1g95vPhplgfEpDnNwRrKRZ50iG5?= =?us-ascii?Q?wBBOt017JjyvJoGzCT6IuvB38jnj6pv9v66/qD9f0CwPNAjAuUgRj1EZWK9y?= =?us-ascii?Q?8vL6eWYtCk5k622IfcGkaByOdPAk5wJ5WsNR/YkCguNOLn1AZ69YGy+4Vnpl?= =?us-ascii?Q?RXTyTUbqhJayYa4wl5sGlDAdXu5J3ugQswooDT4+CMaMe3wX0y2JVh979HXu?= =?us-ascii?Q?9js5mami3eLF3sgzwdxLwC1a8xWUvsZP7kr+eR779YVnibCX0TSF5wrCw5IT?= =?us-ascii?Q?V8426zGK/8bOee5mSybJzPoNX6+LZHboyjmvlFUmLU1hciTar57XYFMWDIiT?= =?us-ascii?Q?Mw+FIkkATmwoAtrgMFA71hIYM4j/vP/i6YGXUYdTN92F6SAvsHS+BOIqo/w6?= =?us-ascii?Q?ofz3lKJSd3AgjKo0Y7NQD6M+EYEfkpPs28t5rqlKx8PnQ///zE4nZO9njXnF?= =?us-ascii?Q?aEsarznjNOOUToMHUscXVcLoJWnUFwWJkuabzckNnAVe+tLljNeubQMwg3QS?= =?us-ascii?Q?Gz2eSjfyyFFWkxpt/kV5sU3Ydm96z+mJtQ2aOKVrKN7lINVeoOgvZVbAjg7x?= =?us-ascii?Q?m2SypnJM5/GI7dlW2CCt7A9oUuiQFKd5xlRVid6+RIN4KhnWx8GTEIaswAqP?= =?us-ascii?Q?AHiX?= X-OriginatorOrg: synaptics.com X-MS-Exchange-CrossTenant-AuthSource: BN8PR03MB4724.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Dec 2020 03:36:04.9497 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 335d1fbc-2124-4173-9863-17e7051a2a0e X-MS-Exchange-CrossTenant-Network-Message-Id: c54e2b8b-8dd4-4c8e-b737-08d8abaadf39 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: o6Q46OcDxRtnFeoeus05QYzjMxEER8HseS5gNYdrkLTpri1y3nv3U3FP7tiaQLZ88R8LLId02FxFPaFZikQDvw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN7PR03MB3940 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org After we move dw_pcie_msi_init() into core -- dw_pcie_host_init(), the MSI stops working after resume. Because dw_pcie_host_init() is only called once during probe. To fix this issue, we move dw_pcie_msi_init() to dw_pcie_setup_rc(). Fixes: 59fbab1ae40e ("PCI: dwc: Move dw_pcie_msi_init() into core") Signed-off-by: Jisheng Zhang --- Since v1: - rebased on 5.11-rc1 - add Fixes tag drivers/pci/controller/dwc/pcie-designware-host.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 8a84c005f32b..5240b5f0973d 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -423,7 +423,6 @@ int dw_pcie_host_init(struct pcie_port *pp) } dw_pcie_setup_rc(pp); - dw_pcie_msi_init(pp); if (!dw_pcie_link_up(pci) && pci->ops->start_link) { ret = pci->ops->start_link(pci); @@ -574,6 +573,8 @@ void dw_pcie_setup_rc(struct pcie_port *pp) } } + dw_pcie_msi_init(pp); + /* Setup RC BARs */ dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0x00000004); dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_1, 0x00000000); -- 2.30.0.rc2