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Miller" , Florian Fainelli , Vivien Didelot , Andrew Lunn , "UNGLinuxDriver@microchip.com" , Alexandre Belloni , Claudiu Manoil , Lee Jones Subject: Re: [RFC v8 net-next 00/16] add support for VSC7512 control over SPI Message-ID: <20220510025748.GA2316428@euler> References: <20220508185313.2222956-1-colin.foster@in-advantage.com> <20220509171304.hfh5rbynt4qtr6m4@skbuf> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220509171304.hfh5rbynt4qtr6m4@skbuf> X-ClientProxiedBy: BYAPR08CA0007.namprd08.prod.outlook.com (2603:10b6:a03:100::20) To MWHPR1001MB2351.namprd10.prod.outlook.com (2603:10b6:301:35::37) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 5d0fe5ad-fd1b-4af2-747b-08da3230e15b X-MS-TrafficTypeDiagnostic: BN6PR10MB1396:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 33qoI8UR3ybqIdHS0LdYPaxtSq9wGFkfO6M55ZISJ0UNU+CCvUbJtB6zX8BOelxsh8MXnHEfPyfrXDvnc/dnN+pH32OlJY1tOBkA5Ljandct5XlnnCiNx/6LJwfqAC7Kx4vPvF6WSfCoGTceQMkRGvkA6kwWeVJUfrCIbJEIEs3Fv9ga0FIll2S/nlLb8fS068U4nZteTslUnl5qMKsrnf4YPldFmJvpWx2voxSAzDKGkqadwC3ydJKeYp5+Y6P2X2Vx6Dh+MfF0tYvOSwCo0GDaYzlglJfHJFBsUwqqD+BKafuIesbMJBpIRvd4P69dl7mqkxHD1A+/3+WyVN9QhVt0X3354mlAccND9U6cp/eyjAERDrf7LGuIvaouy8miE4Qn/5+OwGuBfRZ+v2oi5zJ5aIt5cKIwMRi1uUZsQb0RiCYk3LRsD+eBZjfX6tvtwshEPhc6Y3rDz05GqeRA0qWec2X9jRrl/rjT9W+Sy4T0hDyCMPx1wVOeQNZPi30ieOeDx71m2wHR/G/+Zx4py12bj7pClK1K6DIuw5ochkVXe0MlQSpzjIF2BjqCtMgM+6EjKWEYwnTIm6qZ6zgyOOXoVm1wicTGCybYLAOhYtuzcd3MHn1VhkRdhBw1aAgUCQk9MQARgouxVgE9mbdUka3ukyL7dc6f2RgiA8ZgEuPCnJ6NUwaCXgCyh+QbNPXgsFMRpGDoPZvwgJSzf//oPA== X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:MWHPR1001MB2351.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230001)(7916004)(396003)(136003)(39830400003)(346002)(366004)(376002)(8676002)(83380400001)(33716001)(4326008)(8936002)(9686003)(33656002)(186003)(6512007)(7416002)(66476007)(66556008)(1076003)(66946007)(5660300002)(26005)(44832011)(6916009)(6506007)(52116002)(508600001)(54906003)(2906002)(38350700002)(38100700002)(316002)(6666004)(6486002)(86362001);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?xnYaX+0TxtNODZnOTg6EChk8TyPWIgAC0wdXAk8ZB/PGYv6WjwXb6ODAndjD?= =?us-ascii?Q?4N88AJXf/eGrhdhNQMMIiOX9QOuAaGbyk3sFr/SoYu5ZJF1kal28EQpyxg2h?= =?us-ascii?Q?Tqs9FNqDoq7FaYPL5L60r9vEGWvdiQqgfCQweJHOZoGBP8dpOgfEM3O9V7S1?= =?us-ascii?Q?JG8Ffou/MNDY2X881PPFvRbIC9ZHrxvEq5wPr+YOJ054l/eMeMawfr5H1KG+?= =?us-ascii?Q?souHYJMrGvepZ3HrAUUEHwkxUcVDAeXSF4n5TaQZx4bYszX89DE7tmK5JZGP?= =?us-ascii?Q?I0Mkt6VMQwp12z+ccTI6G4lXbpxMFKq31FpAivvGHN9AQqKgd7fpAykNy5sa?= =?us-ascii?Q?5jpV4h4hMlIp6V1U4uus11AGeuVmGIbO9cxF5Qp7wNYQ1jq1nI/tdKWaVV5l?= =?us-ascii?Q?dr/OmnbO5Z6sPwHJ4yFxj/J68BVZIEdkgC8JVzaVWWMk7jt9RmfMBJh0esmB?= =?us-ascii?Q?BU39xRUf37He/rynF2JXXXPegsvI5pizoFA7W6h+TzKltzqKCRVrW0RVCo3m?= =?us-ascii?Q?aeinqfnVFr9NJAq+RlrtEgf1Wv/DbpJEVAdGS2iPdqs7oKIXrGiZURa44dsY?= =?us-ascii?Q?dEqyRccf8sykMfHYoSmMdPpMZ6/qrU1opyuY8aPU93ljT9Nzyw/IxQvuOkZG?= =?us-ascii?Q?IswpzCv/ao3JQ2dNCMAuafeQrPjobPHhb3WfnqNO2lwOLZqrNST6aDoKGgKA?= =?us-ascii?Q?q8LhO97KZZpL4TUWk7znnMwRg66N+8kRKWCU7n4hJ4fSSBWVdSftI7f8C9Pn?= =?us-ascii?Q?ZrFgkQiyqZKRZx/udtU4ntRG3cuO9rR5ihvhe3CNiwJjo5VXB5rqu3m+eT2m?= =?us-ascii?Q?4QkLL14igPGi2TpOe+cnBBSazJNvuCy0gVXkjv1gQgUaK4qSycfnFUgHjXCP?= =?us-ascii?Q?VX9wHIRCL/+oG3T3/KYmZInJ/lyge6MdLY124hBxJa1t5pebfid9fKG3gn09?= =?us-ascii?Q?ocZfRzlir/IxrEPBuXuZp+jLrWH0lPZVqGRVxSIUj2Knk5TNKOCVyIwt5umM?= =?us-ascii?Q?SQfrljzJZUsOfzIKBnBQxU88CeJNkV9atK2GntLXQtRX1BwZuX0iIfiQ5aZG?= =?us-ascii?Q?6aSHBS5W2IW0ptY8/v3/lZ3xPVaHdpnae28saY2XfTmXPvw2idjSL3jwPP64?= =?us-ascii?Q?tarsY+WkRUgDFFRcJAEEhpWlEyr9TcPB+gmsi2YMgaAoxMuqgcEGOAbu3ew7?= =?us-ascii?Q?9ZsoAQydanfOXQ2O39VEy3HjNv0Yhc0L95NIe3h3Ccr1AW7QnC7rBoSkTrra?= =?us-ascii?Q?o/Evd4DmEKUwSawB2Eoi+MWiBSVfrOs10ElSM8waqguF3EE8pLxDGyzYvDcy?= =?us-ascii?Q?yfgYwLLUa/+/P8R7n2DxJXALliGA6XnOjGwfT6YyvxJjPPC7MmCVAljnxcbJ?= =?us-ascii?Q?unuh5IksfNw2haZicvjfa7Asj1DrnZz3s+6JDmRReQ+e/pgc+Z3uWQ24JaVb?= =?us-ascii?Q?bWs3UXpzDr8s5x3SKIT8Xs0sYr+H+W0zQ8+40LXfumI97HNPEteKyTLs8QUN?= =?us-ascii?Q?Rc9lLuZEALolbnHkJncJHbyBX03oFJJIgmQh7g2M1ULzvSl5k07+hFjN4M2w?= =?us-ascii?Q?PJkEzMplTtgme0h84zOdBbwfAJDyqq+y7ExYSX/auA1ezye8clAB8UgEnFME?= =?us-ascii?Q?qmM3VrWJZEth+ObsEj9Tabl0M7wpGEwQI4e7tkzl8bpBcfKr1ZGc9+Bw0qc/?= =?us-ascii?Q?0Z54+BB8MgEzD6DN3n28JJJMKAYSXh5wPF3WGGi1IVqdm1WygH6ZX7mERK3J?= =?us-ascii?Q?D+d30xxg1WhT1W17Y+MdDLyQU+ALK2JPhwYm7EDrwgqEyeMYhx9b?= X-OriginatorOrg: in-advantage.com X-MS-Exchange-CrossTenant-Network-Message-Id: 5d0fe5ad-fd1b-4af2-747b-08da3230e15b X-MS-Exchange-CrossTenant-AuthSource: MWHPR1001MB2351.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 May 2022 02:57:54.9532 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 48e842ca-fbd8-4633-a79d-0c955a7d3aae X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: +3egBC7svIkRJF/nTM0w09YKrdueP3aoHtbgW5XE9tJLwNxaFsN8trwUuXDC2q8ku4+OSweFQ7LEVVcpZ7vT8uw3oJmjz9wUA2OT/GvVO9Q= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR10MB1396 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org On Mon, May 09, 2022 at 05:13:05PM +0000, Vladimir Oltean wrote: > Hi Colin, > > On Sun, May 08, 2022 at 11:52:57AM -0700, Colin Foster wrote: > > Why does this get printed, if you put a dump_stack() in of_dma_configure_id()? Below. I'm one of the only users of IORESOURCE_REG, from what I can tell... Not sure if that's any consolation. > > > [ 2.835718] pinctrl-ocelot ocelot-pinctrl.0.auto: invalid resource > > [ 2.842717] gpiochip_find_base: found new base at 2026 > > [ 2.842774] gpio gpiochip4: (ocelot-gpio): created GPIO range 0->21 ==> ocelot-pinctrl.0.auto PIN 0->21 > > [ 2.845693] gpio gpiochip4: (ocelot-gpio): added GPIO chardev (254:4) > > [ 2.845828] gpio gpiochip4: registered GPIOs 2026 to 2047 on ocelot-gpio > > [ 2.845855] pinctrl-ocelot ocelot-pinctrl.0.auto: driver registered > > [ 2.855925] pinctrl-microchip-sgpio ocelot-sgpio.1.auto: DMA mask not set > > [ 2.863089] pinctrl-microchip-sgpio ocelot-sgpio.1.auto: invalid resource > > [ 2.870801] gpiochip_find_base: found new base at 1962 > > [ 2.871528] gpio_stub_drv gpiochip5: (ocelot-sgpio.1.auto-input): added GPIO chardev (254:5) > > [ 2.871666] gpio_stub_drv gpiochip5: registered GPIOs 1962 to 2025 on ocelot-sgpio.1.auto-input > > [ 2.872364] gpiochip_find_base: found new base at 1898 > > [ 2.873244] gpio_stub_drv gpiochip6: (ocelot-sgpio.1.auto-output): added GPIO chardev (254:6) > > [ 2.873354] gpio_stub_drv gpiochip6: registered GPIOs 1898 to 1961 on ocelot-sgpio.1.auto-output > > [ 2.881148] mscc-miim ocelot-miim0.2.auto: DMA mask not set [ 16.699517] CPU: 0 PID: 7 Comm: kworker/u2:0 Not tainted 5.18.0-rc5-01315-g0a0ea78e3a79-dirty #632 [ 16.708574] Hardware name: Generic AM33XX (Flattened Device Tree) [ 16.714704] Workqueue: events_unbound deferred_probe_work_func [ 16.720608] Backtrace: [ 16.723071] dump_backtrace from show_stack+0x20/0x24 [ 16.728179] r7:c31bcc10 r6:00000000 r5:c1647b38 r4:a0000013 [ 16.733863] show_stack from dump_stack_lvl+0x60/0x78 [ 16.738954] dump_stack_lvl from dump_stack+0x18/0x1c [ 16.744040] r7:c31bcc10 r6:c31bcc10 r5:c31bcc10 r4:00000000 [ 16.749724] dump_stack from of_dma_configure_id+0x48/0x314 [ 16.755335] of_dma_configure_id from platform_dma_configure+0x2c/0x38 [ 16.761911] r10:df9bf424 r9:df9bf424 r8:00000069 r7:c31bcc10 r6:c1bbac5c r5:c31bcc10 [ 16.769777] r4:00000000 [ 16.772320] platform_dma_configure from really_probe+0x78/0x298 platform_dma_configure gets called because... [ 16.778360] really_probe from __driver_probe_device+0x94/0xf4 [ 16.784230] r7:c31bcc10 r6:c31bcc10 r5:c1bbac5c r4:c31bcc10 [ 16.789913] __driver_probe_device from driver_probe_device+0x44/0xe0 [ 16.796391] r5:c1c51f28 r4:c1c51f24 [ 16.799980] driver_probe_device from __device_attach_driver+0x9c/0xc4 [ 16.806548] r9:df9bf424 r8:c1b9c728 r7:c1c51ef8 r6:c31bcc10 r5:e002191c r4:c1bbac5c [ 16.814326] __device_attach_driver from bus_for_each_drv+0x94/0xe4 [ 16.820635] r7:c1c51ef8 r6:c0a012e4 r5:e002191c r4:00000000 [ 16.826319] bus_for_each_drv from __device_attach+0x104/0x170 [ 16.832190] r6:00000001 r5:c31bcc54 r4:c31bcc10 [ 16.836827] __device_attach from device_initial_probe+0x1c/0x20 [ 16.842871] r6:c31bcc10 r5:c1b9ccd0 r4:c31bcc10 [ 16.847507] device_initial_probe from bus_probe_device+0x94/0x9c [ 16.853637] bus_probe_device from device_add+0x3ec/0x8b4 [ 16.859073] r7:c1c51ef8 r6:c31b9c00 r5:00000000 r4:c31bcc10 [ 16.864756] device_add from platform_device_add+0x100/0x210 [ 16.870455] r10:c1a21744 r9:c1a21724 r8:c31bcc10 r7:00000002 r6:c31bcc00 r5:c3201aa0 [ 16.878320] r4:00000002 [ 16.880864] platform_device_add from mfd_add_devices+0x308/0x62c platform_device_add sets up pdev->bus = &platform_bus_type; That assignment looks to date back to the before times... Now you have me curious. And a little scared :-) [ 16.887008] r10:00000000 r9:00000000 r8:00000000 r7:00000002 r6:c31bcc00 r5:c3201a40 [ 16.894875] r4:c12be398 r3:00000000 [ 16.898465] mfd_add_devices from devm_mfd_add_devices+0x80/0xc0 [ 16.904514] r10:df9be9bc r9:df9be9bc r8:00000005 r7:c12be2e8 r6:fffffffe r5:c31b9c00 [ 16.912381] r4:c31ecc40 [ 16.914924] devm_mfd_add_devices from ocelot_core_init+0x40/0x6c [ 16.921058] r8:00000065 r7:c31b9c00 r6:c31ec9c0 r5:00000000 r4:c31b9c00 [ 16.927790] ocelot_core_init from ocelot_spi_probe+0xf4/0x188 [ 16.933662] r5:00000000 r4:c31b9c00 [ 16.937251] ocelot_spi_probe from spi_probe+0x94/0xb8 [ 16.942434] r7:c31b9c00 r6:c1b9fc60 r5:c31b9c00 r4:00000000 [ 16.948118] spi_probe from really_probe+0x110/0x298 [ 16.953116] r7:c31b9c00 r6:c1b9fc70 r5:c31b9c00 r4:00000000 [ 16.958800] really_probe from __driver_probe_device+0x94/0xf4 [ 16.964669] r7:c31b9c00 r6:c31b9c00 r5:c1b9fc70 r4:c31b9c00 [ 16.970354] __driver_probe_device from driver_probe_device+0x44/0xe0 [ 16.976832] r5:c1c51f28 r4:c1c51f24 [ 16.980422] driver_probe_device from __device_attach_driver+0x9c/0xc4 [ 16.986991] r9:df9be9bc r8:c1b9c728 r7:c1c51ef8 r6:c31b9c00 r5:e0021bc4 r4:c1b9fc70 [ 16.994768] __device_attach_driver from bus_for_each_drv+0x94/0xe4 [ 17.001077] r7:c1c51ef8 r6:c0a012e4 r5:e0021bc4 r4:00000000 [ 17.006762] bus_for_each_drv from __device_attach+0x104/0x170 [ 17.012632] r6:00000001 r5:c31b9c44 r4:c31b9c00 [ 17.017269] __device_attach from device_initial_probe+0x1c/0x20 [ 17.023311] r6:c31b9c00 r5:c1bb0a50 r4:c31b9c00 [ 17.027948] device_initial_probe from bus_probe_device+0x94/0x9c [ 17.034077] bus_probe_device from device_add+0x3ec/0x8b4 [ 17.039513] r7:c1c51ef8 r6:c31b9800 r5:00000000 r4:c31b9c00 [ 17.045197] device_add from __spi_add_device+0x7c/0x10c [ 17.050550] r10:c1c53844 r9:c30ec810 r8:00000001 r7:c30ec810 r6:c31b9800 r5:c31b9c00 [ 17.058415] r4:00000000 [ 17.060959] __spi_add_device from spi_add_device+0x48/0x78 [ 17.066568] r7:00000000 r6:c31b9800 r5:c31b9c00 r4:c31b9a1c [ 17.072252] spi_add_device from of_register_spi_device+0x258/0x390 [ 17.078556] r5:df9be9a0 r4:c31b9c00 [ 17.082147] of_register_spi_device from spi_register_controller+0x26c/0x6d8 [ 17.089239] r8:c17105c0 r7:df9bea04 r6:df9be9a0 r5:00000000 r4:c31b9800 [ 17.095970] spi_register_controller from devm_spi_register_controller+0x24/0x60 [ 17.103412] r10:c1c53844 r9:c31e9584 r8:c31b9800 r7:c31b9800 r6:c30ec810 r5:c31b9800 [ 17.111278] r4:c31b9bc0 [ 17.113822] devm_spi_register_controller from omap2_mcspi_probe+0x4c8/0x574 [ 17.120924] r7:c31b9800 r6:00000000 r5:c30ec940 r4:c31b9bc0 [ 17.126608] omap2_mcspi_probe from platform_probe+0x6c/0xc8 [ 17.132308] r10:c1bf0f80 r9:c202f00d r8:00000065 r7:c30ec810 r6:c1bb1d00 r5:c30ec810 [ 17.140174] r4:00000000 [ 17.142717] platform_probe from really_probe+0x110/0x298 [ 17.148151] r7:c30ec810 r6:c1bb1d00 r5:c30ec810 r4:00000000 [ 17.153835] really_probe from __driver_probe_device+0x94/0xf4 [ 17.159704] r7:c30ec810 r6:c30ec810 r5:c1bb1d00 r4:c30ec810 [ 17.165387] __driver_probe_device from driver_probe_device+0x44/0xe0 [ 17.171865] r5:c1c51f28 r4:c1c51f24 [ 17.175455] driver_probe_device from __device_attach_driver+0x9c/0xc4 [ 17.182023] r9:c202f00d r8:c1b9ca1c r7:00000000 r6:c30ec810 r5:e0021e84 r4:c1bb1d00 [ 17.189800] __device_attach_driver from bus_for_each_drv+0x94/0xe4 [ 17.196108] r7:00000000 r6:c0a012e4 r5:e0021e84 r4:00000000 [ 17.201792] bus_for_each_drv from __device_attach+0x104/0x170 [ 17.207661] r6:00000001 r5:c30ec854 r4:c30ec810 [ 17.212299] __device_attach from device_initial_probe+0x1c/0x20 [ 17.218342] r6:c30ec810 r5:c1b9ccd0 r4:c30ec810 [ 17.222979] device_initial_probe from bus_probe_device+0x94/0x9c [ 17.229109] bus_probe_device from deferred_probe_work_func+0x8c/0xb8 [ 17.235594] r7:00000000 r6:c1b9ca30 r5:c1b9ca1c r4:c30ec810 [ 17.241277] deferred_probe_work_func from process_one_work+0x1e0/0x53c [ 17.247950] r9:c202f00d r8:00000000 r7:c202f000 r6:c2020a00 r5:c2156500 r4:c1b9ca5c [ 17.255728] process_one_work from worker_thread+0x238/0x4fc [ 17.261428] r10:c2020a00 r9:00000088 r8:c1a03d00 r7:c2020a1c r6:c2156518 r5:c2020a00 [ 17.269293] r4:c2156500 [ 17.271836] worker_thread from kthread+0x108/0x138 [ 17.276757] r10:00000000 r9:e0009e4c r8:c2160cc0 r7:c21a6a80 r6:c2156500 r5:c036aac8 [ 17.284624] r4:c2160900 [ 17.287168] kthread from ret_from_fork+0x14/0x2c [ 17.291904] Exception stack(0xe0021fb0 to 0xe0021ff8) [ 17.296982] 1fa0: 00000000 00000000 00000000 00000000 [ 17.305202] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 17.313420] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 17.320069] r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c037341c r4:c2160900 [ 17.328184] mscc-miim ocelot-miim0.2.auto: DMA mask not set