Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Functions to handle I2O drivers (OSMs) and I2O bus type for sysfs |
| 3 | * |
| 4 | * Copyright (C) 2004 Markus Lidel <Markus.Lidel@shadowconnect.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; either version 2 of the License, or (at your |
| 9 | * option) any later version. |
| 10 | * |
| 11 | * Fixes/additions: |
| 12 | * Markus Lidel <Markus.Lidel@shadowconnect.com> |
| 13 | * initial version. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/device.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/rwsem.h> |
Alan Cox | 2cbf7fe | 2015-02-03 13:18:55 +0000 | [diff] [blame] | 19 | #include "i2o.h" |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 20 | #include <linux/workqueue.h> |
| 21 | #include <linux/string.h> |
| 22 | #include <linux/slab.h> |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 23 | #include "core.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 25 | #define OSM_NAME "i2o" |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | /* max_drivers - Maximum I2O drivers (OSMs) which could be registered */ |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 28 | static unsigned int i2o_max_drivers = I2O_MAX_DRIVERS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | module_param_named(max_drivers, i2o_max_drivers, uint, 0); |
| 30 | MODULE_PARM_DESC(max_drivers, "maximum number of OSM's to support"); |
| 31 | |
| 32 | /* I2O drivers lock and array */ |
| 33 | static spinlock_t i2o_drivers_lock; |
| 34 | static struct i2o_driver **i2o_drivers; |
| 35 | |
| 36 | /** |
Randy Dunlap | d9489fb | 2006-12-06 20:38:43 -0800 | [diff] [blame] | 37 | * i2o_bus_match - Tell if I2O device class id matches the class ids of the I2O driver (OSM) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | * @dev: device which should be verified |
| 39 | * @drv: the driver to match against |
| 40 | * |
| 41 | * Used by the bus to check if the driver wants to handle the device. |
| 42 | * |
| 43 | * Returns 1 if the class ids of the driver match the class id of the |
| 44 | * device, otherwise 0. |
| 45 | */ |
| 46 | static int i2o_bus_match(struct device *dev, struct device_driver *drv) |
| 47 | { |
| 48 | struct i2o_device *i2o_dev = to_i2o_device(dev); |
| 49 | struct i2o_driver *i2o_drv = to_i2o_driver(drv); |
| 50 | struct i2o_class_id *ids = i2o_drv->classes; |
| 51 | |
| 52 | if (ids) |
| 53 | while (ids->class_id != I2O_CLASS_END) { |
| 54 | if (ids->class_id == i2o_dev->lct_data.class_id) |
| 55 | return 1; |
| 56 | ids++; |
| 57 | } |
| 58 | return 0; |
| 59 | }; |
| 60 | |
| 61 | /* I2O bus type */ |
| 62 | struct bus_type i2o_bus_type = { |
| 63 | .name = "i2o", |
| 64 | .match = i2o_bus_match, |
Greg Kroah-Hartman | ba6857b | 2013-10-07 18:27:42 -0700 | [diff] [blame] | 65 | .dev_groups = i2o_device_groups, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | }; |
| 67 | |
| 68 | /** |
| 69 | * i2o_driver_register - Register a I2O driver (OSM) in the I2O core |
| 70 | * @drv: I2O driver which should be registered |
| 71 | * |
| 72 | * Registers the OSM drv in the I2O core and creates an event queues if |
| 73 | * necessary. |
| 74 | * |
| 75 | * Returns 0 on success or negative error code on failure. |
| 76 | */ |
| 77 | int i2o_driver_register(struct i2o_driver *drv) |
| 78 | { |
| 79 | struct i2o_controller *c; |
| 80 | int i; |
| 81 | int rc = 0; |
| 82 | unsigned long flags; |
| 83 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 84 | osm_debug("Register driver %s\n", drv->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | if (drv->event) { |
Kees Cook | d853754 | 2013-07-03 15:04:57 -0700 | [diff] [blame] | 87 | drv->event_queue = alloc_workqueue("%s", WQ_MEM_RECLAIM, 1, |
| 88 | drv->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | if (!drv->event_queue) { |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 90 | osm_err("Could not initialize event queue for driver " |
| 91 | "%s\n", drv->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | return -EFAULT; |
| 93 | } |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 94 | osm_debug("Event queue initialized for driver %s\n", drv->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } else |
| 96 | drv->event_queue = NULL; |
| 97 | |
| 98 | drv->driver.name = drv->name; |
| 99 | drv->driver.bus = &i2o_bus_type; |
| 100 | |
| 101 | spin_lock_irqsave(&i2o_drivers_lock, flags); |
| 102 | |
| 103 | for (i = 0; i2o_drivers[i]; i++) |
| 104 | if (i >= i2o_max_drivers) { |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 105 | osm_err("too many drivers registered, increase " |
| 106 | "max_drivers\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | spin_unlock_irqrestore(&i2o_drivers_lock, flags); |
Wei Yongjun | 1099243 | 2013-11-12 15:10:24 -0800 | [diff] [blame] | 108 | rc = -EFAULT; |
| 109 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | } |
| 111 | |
| 112 | drv->context = i; |
| 113 | i2o_drivers[i] = drv; |
| 114 | |
| 115 | spin_unlock_irqrestore(&i2o_drivers_lock, flags); |
| 116 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 117 | osm_debug("driver %s gets context id %d\n", drv->name, drv->context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
| 119 | list_for_each_entry(c, &i2o_controllers, list) { |
| 120 | struct i2o_device *i2o_dev; |
| 121 | |
| 122 | i2o_driver_notify_controller_add(drv, c); |
| 123 | list_for_each_entry(i2o_dev, &c->devices, list) |
Markus Lidel | f33213e | 2005-06-23 22:02:23 -0700 | [diff] [blame] | 124 | i2o_driver_notify_device_add(drv, i2o_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | } |
| 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | rc = driver_register(&drv->driver); |
Wei Yongjun | 1099243 | 2013-11-12 15:10:24 -0800 | [diff] [blame] | 128 | if (rc) |
| 129 | goto out; |
| 130 | |
| 131 | return 0; |
| 132 | out: |
| 133 | if (drv->event_queue) { |
| 134 | destroy_workqueue(drv->event_queue); |
| 135 | drv->event_queue = NULL; |
Akinobu Mita | e578e9a | 2007-05-23 13:58:05 -0700 | [diff] [blame] | 136 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
| 138 | return rc; |
| 139 | }; |
| 140 | |
| 141 | /** |
| 142 | * i2o_driver_unregister - Unregister a I2O driver (OSM) from the I2O core |
| 143 | * @drv: I2O driver which should be unregistered |
| 144 | * |
| 145 | * Unregisters the OSM drv from the I2O core and cleanup event queues if |
| 146 | * necessary. |
| 147 | */ |
| 148 | void i2o_driver_unregister(struct i2o_driver *drv) |
| 149 | { |
| 150 | struct i2o_controller *c; |
| 151 | unsigned long flags; |
| 152 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 153 | osm_debug("unregister driver %s\n", drv->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
| 155 | driver_unregister(&drv->driver); |
| 156 | |
| 157 | list_for_each_entry(c, &i2o_controllers, list) { |
| 158 | struct i2o_device *i2o_dev; |
| 159 | |
| 160 | list_for_each_entry(i2o_dev, &c->devices, list) |
| 161 | i2o_driver_notify_device_remove(drv, i2o_dev); |
| 162 | |
| 163 | i2o_driver_notify_controller_remove(drv, c); |
| 164 | } |
| 165 | |
| 166 | spin_lock_irqsave(&i2o_drivers_lock, flags); |
| 167 | i2o_drivers[drv->context] = NULL; |
| 168 | spin_unlock_irqrestore(&i2o_drivers_lock, flags); |
| 169 | |
| 170 | if (drv->event_queue) { |
| 171 | destroy_workqueue(drv->event_queue); |
| 172 | drv->event_queue = NULL; |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 173 | osm_debug("event queue removed for %s\n", drv->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
| 175 | }; |
| 176 | |
| 177 | /** |
| 178 | * i2o_driver_dispatch - dispatch an I2O reply message |
| 179 | * @c: I2O controller of the message |
| 180 | * @m: I2O message number |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | * |
| 182 | * The reply is delivered to the driver from which the original message |
| 183 | * was. This function is only called from interrupt context. |
| 184 | * |
| 185 | * Returns 0 on success and the message should not be flushed. Returns > 0 |
| 186 | * on success and if the message should be flushed afterwords. Returns |
| 187 | * negative error code on failure (the message will be flushed too). |
| 188 | */ |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 189 | int i2o_driver_dispatch(struct i2o_controller *c, u32 m) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
| 191 | struct i2o_driver *drv; |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 192 | struct i2o_message *msg = i2o_msg_out_to_virt(c, m); |
| 193 | u32 context = le32_to_cpu(msg->u.s.icntxt); |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 194 | unsigned long flags; |
| 195 | |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 196 | if (unlikely(context >= i2o_max_drivers)) { |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 197 | osm_warn("%s: Spurious reply to unknown driver %d\n", c->name, |
| 198 | context); |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 199 | return -EIO; |
| 200 | } |
| 201 | |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 202 | spin_lock_irqsave(&i2o_drivers_lock, flags); |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 203 | drv = i2o_drivers[context]; |
Markus Lidel | f10378f | 2005-06-23 22:02:16 -0700 | [diff] [blame] | 204 | spin_unlock_irqrestore(&i2o_drivers_lock, flags); |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 205 | |
| 206 | if (unlikely(!drv)) { |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 207 | osm_warn("%s: Spurious reply to unknown driver %d\n", c->name, |
| 208 | context); |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 209 | return -EIO; |
| 210 | } |
| 211 | |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 212 | if ((le32_to_cpu(msg->u.head[1]) >> 24) == I2O_CMD_UTIL_EVT_REGISTER) { |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 213 | struct i2o_device *dev, *tmp; |
| 214 | struct i2o_event *evt; |
| 215 | u16 size; |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 216 | u16 tid = le32_to_cpu(msg->u.head[1]) & 0xfff; |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 217 | |
| 218 | osm_debug("event received from device %d\n", tid); |
| 219 | |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 220 | if (!drv->event) |
| 221 | return -EIO; |
| 222 | |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 223 | /* cut of header from message size (in 32-bit words) */ |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 224 | size = (le32_to_cpu(msg->u.head[0]) >> 16) - 5; |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 225 | |
Markus Lidel | f6ed39a | 2006-01-06 00:19:33 -0800 | [diff] [blame] | 226 | evt = kzalloc(size * 4 + sizeof(*evt), GFP_ATOMIC); |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 227 | if (!evt) |
| 228 | return -ENOMEM; |
| 229 | |
| 230 | evt->size = size; |
Markus Lidel | 9e87545 | 2005-06-23 22:02:21 -0700 | [diff] [blame] | 231 | evt->tcntxt = le32_to_cpu(msg->u.s.tcntxt); |
| 232 | evt->event_indicator = le32_to_cpu(msg->body[0]); |
Markus Lidel | dcceafe | 2006-01-06 00:19:32 -0800 | [diff] [blame] | 233 | memcpy(&evt->data, &msg->body[1], size * 4); |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 234 | |
| 235 | list_for_each_entry_safe(dev, tmp, &c->devices, list) |
| 236 | if (dev->lct_data.tid == tid) { |
| 237 | evt->i2o_dev = dev; |
| 238 | break; |
| 239 | } |
| 240 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 241 | INIT_WORK(&evt->work, drv->event); |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 242 | queue_work(drv->event_queue, &evt->work); |
| 243 | return 1; |
| 244 | } |
| 245 | |
| 246 | if (unlikely(!drv->reply)) { |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 247 | osm_debug("%s: Reply to driver %s, but no reply function" |
| 248 | " defined!\n", c->name, drv->name); |
Markus Lidel | 61fbfa8 | 2005-06-23 22:02:11 -0700 | [diff] [blame] | 249 | return -EIO; |
| 250 | } |
| 251 | |
| 252 | return drv->reply(c, m, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | /** |
| 256 | * i2o_driver_notify_controller_add_all - Send notify of added controller |
Randy Dunlap | d9489fb | 2006-12-06 20:38:43 -0800 | [diff] [blame] | 257 | * @c: newly added controller |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | * |
| 259 | * Send notifications to all registered drivers that a new controller was |
| 260 | * added. |
| 261 | */ |
| 262 | void i2o_driver_notify_controller_add_all(struct i2o_controller *c) |
| 263 | { |
| 264 | int i; |
| 265 | struct i2o_driver *drv; |
| 266 | |
Akinobu Mita | be32479 | 2007-05-23 13:58:06 -0700 | [diff] [blame] | 267 | for (i = 0; i < i2o_max_drivers; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | drv = i2o_drivers[i]; |
| 269 | |
| 270 | if (drv) |
| 271 | i2o_driver_notify_controller_add(drv, c); |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | /** |
Randy Dunlap | d9489fb | 2006-12-06 20:38:43 -0800 | [diff] [blame] | 276 | * i2o_driver_notify_controller_remove_all - Send notify of removed controller |
| 277 | * @c: controller that is being removed |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | * |
| 279 | * Send notifications to all registered drivers that a controller was |
| 280 | * removed. |
| 281 | */ |
| 282 | void i2o_driver_notify_controller_remove_all(struct i2o_controller *c) |
| 283 | { |
| 284 | int i; |
| 285 | struct i2o_driver *drv; |
| 286 | |
Akinobu Mita | be32479 | 2007-05-23 13:58:06 -0700 | [diff] [blame] | 287 | for (i = 0; i < i2o_max_drivers; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | drv = i2o_drivers[i]; |
| 289 | |
| 290 | if (drv) |
| 291 | i2o_driver_notify_controller_remove(drv, c); |
| 292 | } |
| 293 | } |
| 294 | |
| 295 | /** |
Randy Dunlap | d9489fb | 2006-12-06 20:38:43 -0800 | [diff] [blame] | 296 | * i2o_driver_notify_device_add_all - Send notify of added device |
| 297 | * @i2o_dev: newly added I2O device |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | * |
| 299 | * Send notifications to all registered drivers that a device was added. |
| 300 | */ |
| 301 | void i2o_driver_notify_device_add_all(struct i2o_device *i2o_dev) |
| 302 | { |
| 303 | int i; |
| 304 | struct i2o_driver *drv; |
| 305 | |
Akinobu Mita | be32479 | 2007-05-23 13:58:06 -0700 | [diff] [blame] | 306 | for (i = 0; i < i2o_max_drivers; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | drv = i2o_drivers[i]; |
| 308 | |
| 309 | if (drv) |
| 310 | i2o_driver_notify_device_add(drv, i2o_dev); |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | /** |
Randy Dunlap | d9489fb | 2006-12-06 20:38:43 -0800 | [diff] [blame] | 315 | * i2o_driver_notify_device_remove_all - Send notify of removed device |
| 316 | * @i2o_dev: device that is being removed |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | * |
| 318 | * Send notifications to all registered drivers that a device was removed. |
| 319 | */ |
| 320 | void i2o_driver_notify_device_remove_all(struct i2o_device *i2o_dev) |
| 321 | { |
| 322 | int i; |
| 323 | struct i2o_driver *drv; |
| 324 | |
Akinobu Mita | be32479 | 2007-05-23 13:58:06 -0700 | [diff] [blame] | 325 | for (i = 0; i < i2o_max_drivers; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | drv = i2o_drivers[i]; |
| 327 | |
| 328 | if (drv) |
| 329 | i2o_driver_notify_device_remove(drv, i2o_dev); |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | /** |
| 334 | * i2o_driver_init - initialize I2O drivers (OSMs) |
| 335 | * |
| 336 | * Registers the I2O bus and allocate memory for the array of OSMs. |
| 337 | * |
| 338 | * Returns 0 on success or negative error code on failure. |
| 339 | */ |
| 340 | int __init i2o_driver_init(void) |
| 341 | { |
| 342 | int rc = 0; |
| 343 | |
| 344 | spin_lock_init(&i2o_drivers_lock); |
| 345 | |
Akinobu Mita | 82cd0e8 | 2007-05-23 13:58:07 -0700 | [diff] [blame] | 346 | if ((i2o_max_drivers < 2) || (i2o_max_drivers > 64)) { |
| 347 | osm_warn("max_drivers set to %d, but must be >=2 and <= 64\n", |
| 348 | i2o_max_drivers); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | i2o_max_drivers = I2O_MAX_DRIVERS; |
| 350 | } |
Markus Lidel | f88e119 | 2005-06-23 22:02:14 -0700 | [diff] [blame] | 351 | osm_info("max drivers = %d\n", i2o_max_drivers); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | |
| 353 | i2o_drivers = |
Akinobu Mita | be32479 | 2007-05-23 13:58:06 -0700 | [diff] [blame] | 354 | kcalloc(i2o_max_drivers, sizeof(*i2o_drivers), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | if (!i2o_drivers) |
| 356 | return -ENOMEM; |
| 357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | rc = bus_register(&i2o_bus_type); |
| 359 | |
| 360 | if (rc < 0) |
| 361 | kfree(i2o_drivers); |
| 362 | |
| 363 | return rc; |
| 364 | }; |
| 365 | |
| 366 | /** |
| 367 | * i2o_driver_exit - clean up I2O drivers (OSMs) |
| 368 | * |
Randy Dunlap | d9489fb | 2006-12-06 20:38:43 -0800 | [diff] [blame] | 369 | * Unregisters the I2O bus and frees driver array. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | */ |
Ralf Baechle | d784372 | 2006-12-13 00:33:53 -0800 | [diff] [blame] | 371 | void i2o_driver_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | { |
| 373 | bus_unregister(&i2o_bus_type); |
| 374 | kfree(i2o_drivers); |
| 375 | }; |
| 376 | |
| 377 | EXPORT_SYMBOL(i2o_driver_register); |
| 378 | EXPORT_SYMBOL(i2o_driver_unregister); |
| 379 | EXPORT_SYMBOL(i2o_driver_notify_controller_add_all); |
| 380 | EXPORT_SYMBOL(i2o_driver_notify_controller_remove_all); |
| 381 | EXPORT_SYMBOL(i2o_driver_notify_device_add_all); |
| 382 | EXPORT_SYMBOL(i2o_driver_notify_device_remove_all); |