/* * fixed.c * * Copyright 2008 Wolfson Microelectronics PLC. * * Author: Mark Brown * * Copyright (c) 2009 Nokia Corporation * Roger Quadros * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This is useful for systems with mixed controllable and * non-controllable regulators, as well as for allowing testing on * systems with no controllable regulators. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct fixed_voltage_data { struct regulator_desc desc; struct regulator_dev *dev; }; /** * of_get_fixed_voltage_config - extract fixed_voltage_config structure info * @dev: device requesting for fixed_voltage_config * @desc: regulator description * * Populates fixed_voltage_config structure by extracting data from device * tree node, returns a pointer to the populated structure of NULL if memory * alloc fails. */ static struct fixed_voltage_config * of_get_fixed_voltage_config(struct device *dev, const struct regulator_desc *desc) { struct fixed_voltage_config *config; struct device_node *np = dev->of_node; struct regulator_init_data *init_data; config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config), GFP_KERNEL); if (!config) return ERR_PTR(-ENOMEM); config->init_data = of_get_regulator_init_data(dev, dev->of_node, desc); if (!config->init_data) return ERR_PTR(-EINVAL); init_data = config->init_data; init_data->constraints.apply_uV = 0; config->supply_name = init_data->constraints.name; if (init_data->constraints.min_uV == init_data->constraints.max_uV) { config->microvolts = init_data->constraints.min_uV; } else { dev_err(dev, "Fixed regulator specified with variable voltages\n"); return ERR_PTR(-EINVAL); } if (init_data->constraints.boot_on) config->enabled_at_boot = true; config->gpio = of_get_named_gpio(np, "gpio", 0); if ((config->gpio < 0) && (config->gpio != -ENOENT)) return ERR_PTR(config->gpio); of_property_read_u32(np, "startup-delay-us", &config->startup_delay); config->enable_high = of_property_read_bool(np, "enable-active-high"); config->gpio_is_open_drain = of_property_read_bool(np, "gpio-open-drain"); if (of_find_property(np, "vin-supply", NULL)) config->input_supply = "vin"; return config; } /** * acpi_get_fixed_voltage_config - extract fixed_voltage_config structure info * @dev: device requesting for fixed_voltage_config * @desc: regulator description * * Populates fixed_voltage_config structure by extracting data through ACPI * interface, returns a pointer to the populated structure of NULL if memory * alloc fails. */ static struct fixed_voltage_config * acpi_get_fixed_voltage_config(struct device *dev, const struct regulator_desc *desc) { struct fixed_voltage_config *config; const char *supply_name; struct gpio_desc *gpiod; int ret; config = devm_kzalloc(dev, sizeof(*config), GFP_KERNEL); if (!config) return ERR_PTR(-ENOMEM); ret = device_property_read_string(dev, "supply-name", &supply_name); if (!ret) config->supply_name = supply_name; gpiod = gpiod_get(dev, "gpio", GPIOD_ASIS); if (IS_ERR(gpiod)) return ERR_PTR(-ENODEV); config->gpio = desc_to_gpio(gpiod); config->enable_high = device_property_read_bool(dev, "enable-active-high"); gpiod_put(gpiod); return config; } static struct regulator_ops fixed_voltage_ops = { }; static int reg_fixed_voltage_probe(struct platform_device *pdev) { struct fixed_voltage_config *config; struct fixed_voltage_data *drvdata; struct regulator_config cfg = { }; int ret; drvdata = devm_kzalloc(&pdev->dev, sizeof(struct fixed_voltage_data), GFP_KERNEL); if (!drvdata) return -ENOMEM; if (pdev->dev.of_node) { config = of_get_fixed_voltage_config(&pdev->dev, &drvdata->desc); if (IS_ERR(config)) return PTR_ERR(config); } else if (ACPI_HANDLE(&pdev->dev)) { config = acpi_get_fixed_voltage_config(&pdev->dev, &drvdata->desc); if (IS_ERR(config)) return PTR_ERR(config); } else { config = dev_get_platdata(&pdev->dev); } if (!config) return -ENOMEM; drvdata->desc.name = devm_kstrdup(&pdev->dev, config->supply_name, GFP_KERNEL); if (drvdata->desc.name == NULL) { dev_err(&pdev->dev, "Failed to allocate supply name\n"); return -ENOMEM; } drvdata->desc.type = REGULATOR_VOLTAGE; drvdata->desc.owner = THIS_MODULE; drvdata->desc.ops = &fixed_voltage_ops; drvdata->desc.enable_time = config->startup_delay; if (config->input_supply) { drvdata->desc.supply_name = devm_kstrdup(&pdev->dev, config->input_supply, GFP_KERNEL); if (!drvdata->desc.supply_name) { dev_err(&pdev->dev, "Failed to allocate input supply\n"); return -ENOMEM; } } if (config->microvolts) drvdata->desc.n_voltages = 1; drvdata->desc.fixed_uV = config->microvolts; if (gpio_is_valid(config->gpio)) { cfg.ena_gpio = config->gpio; if (pdev->dev.of_node) cfg.ena_gpio_initialized = true; } cfg.ena_gpio_invert = !config->enable_high; if (config->enabled_at_boot) { if (config->enable_high) cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH; else cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW; } else { if (config->enable_high) cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW; else cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH; } if (config->gpio_is_open_drain) cfg.ena_gpio_flags |= GPIOF_OPEN_DRAIN; cfg.dev = &pdev->dev; cfg.init_data = config->init_data; cfg.driver_data = drvdata; cfg.of_node = pdev->dev.of_node; drvdata->dev = devm_regulator_register(&pdev->dev, &drvdata->desc, &cfg); if (IS_ERR(drvdata->dev)) { ret = PTR_ERR(drvdata->dev); dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret); return ret; } platform_set_drvdata(pdev, drvdata); dev_dbg(&pdev->dev, "%s supplying %duV\n", drvdata->desc.name, drvdata->desc.fixed_uV); return 0; } #if defined(CONFIG_OF) static const struct of_device_id fixed_of_match[] = { { .compatible = "regulator-fixed", }, {}, }; MODULE_DEVICE_TABLE(of, fixed_of_match); #endif static struct platform_driver regulator_fixed_voltage_driver = { .probe = reg_fixed_voltage_probe, .driver = { .name = "reg-fixed-voltage", .of_match_table = of_match_ptr(fixed_of_match), }, }; static int __init regulator_fixed_voltage_init(void) { return platform_driver_register(®ulator_fixed_voltage_driver); } subsys_initcall(regulator_fixed_voltage_init); static void __exit regulator_fixed_voltage_exit(void) { platform_driver_unregister(®ulator_fixed_voltage_driver); } module_exit(regulator_fixed_voltage_exit); MODULE_AUTHOR("Mark Brown "); MODULE_DESCRIPTION("Fixed voltage regulator"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:reg-fixed-voltage"); kmem_cache_alloc_trace+0x92/0x1c0 drm_atomic_helper_setup_commit+0x285/0x2f0 [drm_kms_helper] intel_atomic_commit+0x35/0x4f0 [i915] drm_atomic_commit+0x46/0x50 [drm] drm_mode_atomic_ioctl+0x7d4/0xab0 [drm] drm_ioctl+0x2b3/0x490 [drm] do_vfs_ioctl+0x69c/0x700 SyS_ioctl+0x4e/0x80 entry_SYSCALL_64_fastpath+0x13/0x94 INFO: Freed in drm_event_cancel_free+0xa3/0xb0 [drm] age=0 cpu=3 pid=1529 __slab_free+0x48/0x2e0 kfree+0x159/0x1a0 drm_event_cancel_free+0xa3/0xb0 [drm] drm_mode_atomic_ioctl+0x86d/0xab0 [drm] drm_ioctl+0x2b3/0x490 [drm] do_vfs_ioctl+0x69c/0x700 SyS_ioctl+0x4e/0x80 entry_SYSCALL_64_fastpath+0x13/0x94 INFO: Slab 0xffffde1f0997b080 objects=17 used=2 fp=0xffff92fb65ec2578 flags=0x200000000008101 INFO: Object 0xffff92fb65ec2578 @offset=1400 fp=0xffff92fb65ec2ae8 Redzone ffff92fb65ec2570: bb bb bb bb bb bb bb bb ........ Object ffff92fb65ec2578: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec2588: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec2598: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25a8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25b8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25c8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25e8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk. Redzone ffff92fb65ec25f8: bb bb bb bb bb bb bb bb ........ Padding ffff92fb65ec2738: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ CPU: 3 PID: 180 Comm: kworker/3:2 Tainted: G BU 4.10.0-rc6-patser+ #5039 Hardware name: /NUC5PPYB, BIOS PYBSWCEL.86A.0031.2015.0601.1712 06/01/2015 Workqueue: events intel_atomic_helper_free_state [i915] Call Trace: dump_stack+0x4d/0x6d print_trailer+0x20c/0x220 free_debug_processing+0x1c6/0x330 ? drm_atomic_state_default_clear+0xf7/0x1c0 [drm] __slab_free+0x48/0x2e0 ? drm_atomic_state_default_clear+0xf7/0x1c0 [drm] kfree+0x159/0x1a0 drm_atomic_state_default_clear+0xf7/0x1c0 [drm] ? drm_atomic_state_clear+0x30/0x30 [drm] intel_atomic_state_clear+0xd/0x20 [i915] drm_atomic_state_clear+0x1a/0x30 [drm] __drm_atomic_state_free+0x13/0x60 [drm] intel_atomic_helper_free_state+0x5d/0x70 [i915] process_one_work+0x260/0x4a0 worker_thread+0x2d1/0x4f0 kthread+0x127/0x130 ? process_one_work+0x4a0/0x4a0 ? kthread_stop+0x120/0x120 ret_from_fork+0x29/0x40 FIX kmalloc-128: Object at 0xffff92fb65ec2578 not freed Fixes: 3b24f7d67581 ("drm/atomic: Add struct drm_crtc_commit to track async updates") Fixes: 9626014258a5 ("drm/fence: add in-fences support") Cc: <stable@vger.kernel.org> # v4.8+ Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1485854725-27640-1-git-send-email-maarten.lankhorst@linux.intel.com
Diffstat (limited to 'include/uapi/asm-generic/ioctls.h')