/* * Zorro Driver Services * * Copyright (C) 2003 Geert Uytterhoeven * * Loosely based on drivers/pci/pci-driver.c * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive * for more details. */ #include #include #include /** * zorro_match_device - Tell if a Zorro device structure has a matching * Zorro device id structure * @ids: array of Zorro device id structures to search in * @dev: the Zorro device structure to match against * * Used by a driver to check whether a Zorro device present in the * system is in its list of supported devices. Returns the matching * zorro_device_id structure or %NULL if there is no match. */ const struct zorro_device_id * zorro_match_device(const struct zorro_device_id *ids, const struct zorro_dev *z) { while (ids->id) { if (ids->id == ZORRO_WILDCARD || ids->id == z->id) return ids; ids++; } return NULL; } EXPORT_SYMBOL(zorro_match_device); static int zorro_device_probe(struct device *dev) { int error = 0; struct zorro_driver *drv = to_zorro_driver(dev->driver); struct zorro_dev *z = to_zorro_dev(dev); if (!z->driver && drv->probe) { const struct zorro_device_id *id; id = zorro_match_device(drv->id_table, z); if (id) error = drv->probe(z, id); if (error >= 0) { z->driver = drv; error = 0; } } return error; } static int zorro_device_remove(struct device *dev) { struct zorro_dev *z = to_zorro_dev(dev); struct zorro_driver *drv = to_zorro_driver(dev->driver); if (drv) { if (drv->remove) drv->remove(z); z->driver = NULL; } return 0; } /** * zorro_register_driver - register a new Zorro driver * @drv: the driver structure to register * * Adds the driver structure to the list of registered drivers * Returns zero or a negative error value. */ int zorro_register_driver(struct zorro_driver *drv) { /* initialize common driver fields */ drv->driver.name = drv->name; drv->driver.bus = &zorro_bus_type; /* register with core */ return driver_register(&drv->driver); } EXPORT_SYMBOL(zorro_register_driver); /** * zorro_unregister_driver - unregister a zorro driver * @drv: the driver structure to unregister * * Deletes the driver structure from the list of registered Zorro drivers, * gives it a chance to clean up by calling its remove() function for * each device it was responsible for, and marks those devices as * driverless. */ void zorro_unregister_driver(struct zorro_driver *drv) { driver_unregister(&drv->driver); } EXPORT_SYMBOL(zorro_unregister_driver); /** * zorro_bus_match - Tell if a Zorro device structure has a matching Zorro * device id structure * @ids: array of Zorro device id structures to search in * @dev: the Zorro device structure to match against * * Used by a driver to check whether a Zorro device present in the * system is in its list of supported devices.Returns the matching * zorro_device_id structure or %NULL if there is no match. */ static int zorro_bus_match(struct device *dev, struct device_driver *drv) { struct zorro_dev *z = to_zorro_dev(dev); struct zorro_driver *zorro_drv = to_zorro_driver(drv); const struct zorro_device_id *ids = zorro_drv->id_table; if (!ids) return 0; while (ids->id) { if (ids->id == ZORRO_WILDCARD || ids->id == z->id) return 1; ids++; } return 0; } static int zorro_uevent(struct device *dev, struct kobj_uevent_env *env) { struct zorro_dev *z; if (!dev) return -ENODEV; z = to_zorro_dev(dev); if (!z) return -ENODEV; if (add_uevent_var(env, "ZORRO_ID=%08X", z->id) || add_uevent_var(env, "ZORRO_SLOT_NAME=%s", dev_name(dev)) || add_uevent_var(env, "ZORRO_SLOT_ADDR=%04X", z->slotaddr) || add_uevent_var(env, "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id)) return -ENOMEM; return 0; } struct bus_type zorro_bus_type = { .name = "zorro", .dev_name = "zorro", .match = zorro_bus_match, .uevent = zorro_uevent, .probe = zorro_device_probe, .remove = zorro_device_remove, }; EXPORT_SYMBOL(zorro_bus_type); static int __init zorro_driver_init(void) { return bus_register(&zorro_bus_type); } postcore_initcall(zorro_driver_init); lect>
authorStanislaw Gruszka <sgruszka@redhat.com>2017-01-29 12:40:52 +0100
committerKalle Valo <kvalo@codeaurora.org>2017-01-31 09:08:52 +0200
commit33e962c8871f015f5c8978384553dddcf5b81b22 (patch)
tree43aff96c2ee21d9e0fa2018457778a4de52053cd /tools/perf/jvmti/libjvmti.c
parent575ddce0507789bf9830d089557d2199d2f91865 (diff)
rt2x00: fix clk_get call
clk_get() takes two arguments and might return ERR_PTR(), so we have to nullify pointer on that case, to do not break further call to clk_get_rate(). Reported-by: Felix Fietkau <nbd@nbd.name> Fixes: 34db70b92fae ("rt2x00: add copy of clk for soc devices") Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'tools/perf/jvmti/libjvmti.c')