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1da177e4 LT |
1 | /* |
2 | * PCI HotPlug Controller Core | |
3 | * | |
4 | * Copyright (C) 2001-2002 Greg Kroah-Hartman (greg@kroah.com) | |
5 | * Copyright (C) 2001-2002 IBM Corp. | |
6 | * | |
7 | * All rights reserved. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
17 | * NON INFRINGEMENT. See the GNU General Public License for more | |
18 | * details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | * | |
fb5f4d7a | 24 | * Send feedback to <kristen.c.accardi@intel.com> |
1da177e4 | 25 | * |
d9b47d54 BH |
26 | * Authors: |
27 | * Greg Kroah-Hartman <greg@kroah.com> | |
28 | * Scott Murray <scottm@somanetworks.com> | |
1da177e4 LT |
29 | */ |
30 | ||
57b51b9a | 31 | #include <linux/module.h> /* try_module_get & module_put */ |
1da177e4 LT |
32 | #include <linux/moduleparam.h> |
33 | #include <linux/kernel.h> | |
34 | #include <linux/types.h> | |
35 | #include <linux/list.h> | |
7a54f25c GKH |
36 | #include <linux/kobject.h> |
37 | #include <linux/sysfs.h> | |
1da177e4 | 38 | #include <linux/pagemap.h> |
1da177e4 LT |
39 | #include <linux/init.h> |
40 | #include <linux/mount.h> | |
41 | #include <linux/namei.h> | |
95cb9093 | 42 | #include <linux/mutex.h> |
1da177e4 | 43 | #include <linux/pci.h> |
7a54f25c | 44 | #include <linux/pci_hotplug.h> |
7c0f6ba6 | 45 | #include <linux/uaccess.h> |
f46753c5 | 46 | #include "../pci.h" |
c3139ba2 | 47 | #include "cpci_hotplug.h" |
1da177e4 LT |
48 | |
49 | #define MY_NAME "pci_hotplug" | |
50 | ||
ff3ce480 BS |
51 | #define dbg(fmt, arg...) do { if (debug) printk(KERN_DEBUG "%s: %s: " fmt, MY_NAME, __func__, ## arg); } while (0) |
52 | #define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME, ## arg) | |
53 | #define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME, ## arg) | |
54 | #define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME, ## arg) | |
1da177e4 | 55 | |
1da177e4 | 56 | /* local variables */ |
90ab5ee9 | 57 | static bool debug; |
1da177e4 | 58 | |
1da177e4 | 59 | static LIST_HEAD(pci_hotplug_slot_list); |
95cb9093 | 60 | static DEFINE_MUTEX(pci_hp_mutex); |
1da177e4 | 61 | |
1da177e4 | 62 | /* Weee, fun with macros... */ |
3c78bc61 RD |
63 | #define GET_STATUS(name, type) \ |
64 | static int get_##name(struct hotplug_slot *slot, type *value) \ | |
1da177e4 LT |
65 | { \ |
66 | struct hotplug_slot_ops *ops = slot->ops; \ | |
67 | int retval = 0; \ | |
bd1d9855 | 68 | if (!try_module_get(ops->owner)) \ |
c8761fe8 ZY |
69 | return -ENODEV; \ |
70 | if (ops->get_##name) \ | |
71 | retval = ops->get_##name(slot, value); \ | |
72 | else \ | |
73 | *value = slot->info->name; \ | |
74 | module_put(ops->owner); \ | |
1da177e4 LT |
75 | return retval; \ |
76 | } | |
77 | ||
78 | GET_STATUS(power_status, u8) | |
79 | GET_STATUS(attention_status, u8) | |
80 | GET_STATUS(latch_status, u8) | |
81 | GET_STATUS(adapter_status, u8) | |
1da177e4 | 82 | |
a6ed1f4e | 83 | static ssize_t power_read_file(struct pci_slot *pci_slot, char *buf) |
1da177e4 LT |
84 | { |
85 | int retval; | |
86 | u8 value; | |
87 | ||
a6ed1f4e | 88 | retval = get_power_status(pci_slot->hotplug, &value); |
1da177e4 | 89 | if (retval) |
3c78bc61 RD |
90 | return retval; |
91 | ||
92 | return sprintf(buf, "%d\n", value); | |
1da177e4 LT |
93 | } |
94 | ||
f46753c5 | 95 | static ssize_t power_write_file(struct pci_slot *pci_slot, const char *buf, |
3c78bc61 | 96 | size_t count) |
1da177e4 | 97 | { |
f46753c5 | 98 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
99 | unsigned long lpower; |
100 | u8 power; | |
101 | int retval = 0; | |
102 | ||
3c78bc61 | 103 | lpower = simple_strtoul(buf, NULL, 10); |
1da177e4 | 104 | power = (u8)(lpower & 0xff); |
3c78bc61 | 105 | dbg("power = %d\n", power); |
1da177e4 LT |
106 | |
107 | if (!try_module_get(slot->ops->owner)) { | |
108 | retval = -ENODEV; | |
109 | goto exit; | |
110 | } | |
111 | switch (power) { | |
3c78bc61 RD |
112 | case 0: |
113 | if (slot->ops->disable_slot) | |
114 | retval = slot->ops->disable_slot(slot); | |
115 | break; | |
116 | ||
117 | case 1: | |
118 | if (slot->ops->enable_slot) | |
119 | retval = slot->ops->enable_slot(slot); | |
120 | break; | |
121 | ||
122 | default: | |
123 | err("Illegal value specified for power\n"); | |
124 | retval = -EINVAL; | |
1da177e4 LT |
125 | } |
126 | module_put(slot->ops->owner); | |
127 | ||
f7625980 | 128 | exit: |
1da177e4 LT |
129 | if (retval) |
130 | return retval; | |
131 | return count; | |
132 | } | |
133 | ||
f46753c5 | 134 | static struct pci_slot_attribute hotplug_slot_attr_power = { |
1da177e4 LT |
135 | .attr = {.name = "power", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
136 | .show = power_read_file, | |
137 | .store = power_write_file | |
138 | }; | |
139 | ||
a6ed1f4e | 140 | static ssize_t attention_read_file(struct pci_slot *pci_slot, char *buf) |
1da177e4 LT |
141 | { |
142 | int retval; | |
143 | u8 value; | |
144 | ||
a6ed1f4e | 145 | retval = get_attention_status(pci_slot->hotplug, &value); |
1da177e4 | 146 | if (retval) |
3c78bc61 | 147 | return retval; |
1da177e4 | 148 | |
3c78bc61 | 149 | return sprintf(buf, "%d\n", value); |
1da177e4 LT |
150 | } |
151 | ||
a6ed1f4e | 152 | static ssize_t attention_write_file(struct pci_slot *pci_slot, const char *buf, |
3c78bc61 | 153 | size_t count) |
1da177e4 | 154 | { |
a6ed1f4e | 155 | struct hotplug_slot_ops *ops = pci_slot->hotplug->ops; |
1da177e4 LT |
156 | unsigned long lattention; |
157 | u8 attention; | |
158 | int retval = 0; | |
159 | ||
3c78bc61 | 160 | lattention = simple_strtoul(buf, NULL, 10); |
1da177e4 | 161 | attention = (u8)(lattention & 0xff); |
3c78bc61 | 162 | dbg(" - attention = %d\n", attention); |
1da177e4 | 163 | |
f46753c5 | 164 | if (!try_module_get(ops->owner)) { |
1da177e4 LT |
165 | retval = -ENODEV; |
166 | goto exit; | |
167 | } | |
f46753c5 | 168 | if (ops->set_attention_status) |
a6ed1f4e | 169 | retval = ops->set_attention_status(pci_slot->hotplug, attention); |
f46753c5 | 170 | module_put(ops->owner); |
1da177e4 | 171 | |
f7625980 | 172 | exit: |
1da177e4 LT |
173 | if (retval) |
174 | return retval; | |
175 | return count; | |
176 | } | |
177 | ||
f46753c5 | 178 | static struct pci_slot_attribute hotplug_slot_attr_attention = { |
1da177e4 LT |
179 | .attr = {.name = "attention", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
180 | .show = attention_read_file, | |
181 | .store = attention_write_file | |
182 | }; | |
183 | ||
a6ed1f4e | 184 | static ssize_t latch_read_file(struct pci_slot *pci_slot, char *buf) |
1da177e4 LT |
185 | { |
186 | int retval; | |
187 | u8 value; | |
188 | ||
a6ed1f4e | 189 | retval = get_latch_status(pci_slot->hotplug, &value); |
1da177e4 | 190 | if (retval) |
3c78bc61 | 191 | return retval; |
1da177e4 | 192 | |
3c78bc61 | 193 | return sprintf(buf, "%d\n", value); |
1da177e4 LT |
194 | } |
195 | ||
f46753c5 | 196 | static struct pci_slot_attribute hotplug_slot_attr_latch = { |
1da177e4 LT |
197 | .attr = {.name = "latch", .mode = S_IFREG | S_IRUGO}, |
198 | .show = latch_read_file, | |
199 | }; | |
200 | ||
a6ed1f4e | 201 | static ssize_t presence_read_file(struct pci_slot *pci_slot, char *buf) |
1da177e4 LT |
202 | { |
203 | int retval; | |
204 | u8 value; | |
205 | ||
a6ed1f4e | 206 | retval = get_adapter_status(pci_slot->hotplug, &value); |
1da177e4 | 207 | if (retval) |
3c78bc61 | 208 | return retval; |
1da177e4 | 209 | |
3c78bc61 | 210 | return sprintf(buf, "%d\n", value); |
1da177e4 LT |
211 | } |
212 | ||
f46753c5 | 213 | static struct pci_slot_attribute hotplug_slot_attr_presence = { |
1da177e4 LT |
214 | .attr = {.name = "adapter", .mode = S_IFREG | S_IRUGO}, |
215 | .show = presence_read_file, | |
216 | }; | |
217 | ||
f46753c5 | 218 | static ssize_t test_write_file(struct pci_slot *pci_slot, const char *buf, |
3c78bc61 | 219 | size_t count) |
1da177e4 | 220 | { |
f46753c5 | 221 | struct hotplug_slot *slot = pci_slot->hotplug; |
1da177e4 LT |
222 | unsigned long ltest; |
223 | u32 test; | |
224 | int retval = 0; | |
225 | ||
ff3ce480 | 226 | ltest = simple_strtoul(buf, NULL, 10); |
1da177e4 | 227 | test = (u32)(ltest & 0xffffffff); |
3c78bc61 | 228 | dbg("test = %d\n", test); |
1da177e4 LT |
229 | |
230 | if (!try_module_get(slot->ops->owner)) { | |
231 | retval = -ENODEV; | |
232 | goto exit; | |
233 | } | |
234 | if (slot->ops->hardware_test) | |
235 | retval = slot->ops->hardware_test(slot, test); | |
236 | module_put(slot->ops->owner); | |
237 | ||
f7625980 | 238 | exit: |
1da177e4 LT |
239 | if (retval) |
240 | return retval; | |
241 | return count; | |
242 | } | |
243 | ||
f46753c5 | 244 | static struct pci_slot_attribute hotplug_slot_attr_test = { |
1da177e4 LT |
245 | .attr = {.name = "test", .mode = S_IFREG | S_IRUGO | S_IWUSR}, |
246 | .store = test_write_file | |
247 | }; | |
248 | ||
498a8faf | 249 | static bool has_power_file(struct pci_slot *pci_slot) |
1da177e4 | 250 | { |
f46753c5 | 251 | struct hotplug_slot *slot = pci_slot->hotplug; |
3c78bc61 | 252 | |
1da177e4 | 253 | if ((!slot) || (!slot->ops)) |
498a8faf | 254 | return false; |
1da177e4 LT |
255 | if ((slot->ops->enable_slot) || |
256 | (slot->ops->disable_slot) || | |
257 | (slot->ops->get_power_status)) | |
498a8faf KK |
258 | return true; |
259 | return false; | |
1da177e4 LT |
260 | } |
261 | ||
498a8faf | 262 | static bool has_attention_file(struct pci_slot *pci_slot) |
1da177e4 | 263 | { |
f46753c5 | 264 | struct hotplug_slot *slot = pci_slot->hotplug; |
3c78bc61 | 265 | |
1da177e4 | 266 | if ((!slot) || (!slot->ops)) |
498a8faf | 267 | return false; |
1da177e4 LT |
268 | if ((slot->ops->set_attention_status) || |
269 | (slot->ops->get_attention_status)) | |
498a8faf KK |
270 | return true; |
271 | return false; | |
1da177e4 LT |
272 | } |
273 | ||
498a8faf | 274 | static bool has_latch_file(struct pci_slot *pci_slot) |
1da177e4 | 275 | { |
f46753c5 | 276 | struct hotplug_slot *slot = pci_slot->hotplug; |
3c78bc61 | 277 | |
1da177e4 | 278 | if ((!slot) || (!slot->ops)) |
498a8faf | 279 | return false; |
1da177e4 | 280 | if (slot->ops->get_latch_status) |
498a8faf KK |
281 | return true; |
282 | return false; | |
1da177e4 LT |
283 | } |
284 | ||
498a8faf | 285 | static bool has_adapter_file(struct pci_slot *pci_slot) |
1da177e4 | 286 | { |
f46753c5 | 287 | struct hotplug_slot *slot = pci_slot->hotplug; |
3c78bc61 | 288 | |
1da177e4 | 289 | if ((!slot) || (!slot->ops)) |
498a8faf | 290 | return false; |
1da177e4 | 291 | if (slot->ops->get_adapter_status) |
498a8faf KK |
292 | return true; |
293 | return false; | |
1da177e4 LT |
294 | } |
295 | ||
498a8faf | 296 | static bool has_test_file(struct pci_slot *pci_slot) |
1da177e4 | 297 | { |
f46753c5 | 298 | struct hotplug_slot *slot = pci_slot->hotplug; |
3c78bc61 | 299 | |
1da177e4 | 300 | if ((!slot) || (!slot->ops)) |
498a8faf | 301 | return false; |
1da177e4 | 302 | if (slot->ops->hardware_test) |
498a8faf KK |
303 | return true; |
304 | return false; | |
1da177e4 LT |
305 | } |
306 | ||
a6ed1f4e | 307 | static int fs_add_slot(struct pci_slot *pci_slot) |
1da177e4 | 308 | { |
660a0e8f | 309 | int retval = 0; |
1da177e4 | 310 | |
c825bc94 | 311 | /* Create symbolic link to the hotplug driver module */ |
a6ed1f4e | 312 | pci_hp_create_module_link(pci_slot); |
c825bc94 | 313 | |
a6ed1f4e YW |
314 | if (has_power_file(pci_slot)) { |
315 | retval = sysfs_create_file(&pci_slot->kobj, | |
498a8faf | 316 | &hotplug_slot_attr_power.attr); |
660a0e8f GKH |
317 | if (retval) |
318 | goto exit_power; | |
319 | } | |
1da177e4 | 320 | |
a6ed1f4e YW |
321 | if (has_attention_file(pci_slot)) { |
322 | retval = sysfs_create_file(&pci_slot->kobj, | |
660a0e8f GKH |
323 | &hotplug_slot_attr_attention.attr); |
324 | if (retval) | |
325 | goto exit_attention; | |
326 | } | |
1da177e4 | 327 | |
a6ed1f4e YW |
328 | if (has_latch_file(pci_slot)) { |
329 | retval = sysfs_create_file(&pci_slot->kobj, | |
660a0e8f GKH |
330 | &hotplug_slot_attr_latch.attr); |
331 | if (retval) | |
332 | goto exit_latch; | |
333 | } | |
1da177e4 | 334 | |
a6ed1f4e YW |
335 | if (has_adapter_file(pci_slot)) { |
336 | retval = sysfs_create_file(&pci_slot->kobj, | |
660a0e8f GKH |
337 | &hotplug_slot_attr_presence.attr); |
338 | if (retval) | |
339 | goto exit_adapter; | |
340 | } | |
1da177e4 | 341 | |
a6ed1f4e YW |
342 | if (has_test_file(pci_slot)) { |
343 | retval = sysfs_create_file(&pci_slot->kobj, | |
660a0e8f GKH |
344 | &hotplug_slot_attr_test.attr); |
345 | if (retval) | |
346 | goto exit_test; | |
347 | } | |
348 | ||
349 | goto exit; | |
350 | ||
351 | exit_test: | |
a6ed1f4e YW |
352 | if (has_adapter_file(pci_slot)) |
353 | sysfs_remove_file(&pci_slot->kobj, | |
498a8faf | 354 | &hotplug_slot_attr_presence.attr); |
660a0e8f | 355 | exit_adapter: |
a6ed1f4e YW |
356 | if (has_latch_file(pci_slot)) |
357 | sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_latch.attr); | |
660a0e8f | 358 | exit_latch: |
a6ed1f4e YW |
359 | if (has_attention_file(pci_slot)) |
360 | sysfs_remove_file(&pci_slot->kobj, | |
498a8faf | 361 | &hotplug_slot_attr_attention.attr); |
660a0e8f | 362 | exit_attention: |
a6ed1f4e YW |
363 | if (has_power_file(pci_slot)) |
364 | sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_power.attr); | |
660a0e8f | 365 | exit_power: |
a6ed1f4e | 366 | pci_hp_remove_module_link(pci_slot); |
660a0e8f GKH |
367 | exit: |
368 | return retval; | |
1da177e4 LT |
369 | } |
370 | ||
a6ed1f4e | 371 | static void fs_remove_slot(struct pci_slot *pci_slot) |
1da177e4 | 372 | { |
a6ed1f4e YW |
373 | if (has_power_file(pci_slot)) |
374 | sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_power.attr); | |
1da177e4 | 375 | |
a6ed1f4e YW |
376 | if (has_attention_file(pci_slot)) |
377 | sysfs_remove_file(&pci_slot->kobj, | |
498a8faf | 378 | &hotplug_slot_attr_attention.attr); |
1da177e4 | 379 | |
a6ed1f4e YW |
380 | if (has_latch_file(pci_slot)) |
381 | sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_latch.attr); | |
1da177e4 | 382 | |
a6ed1f4e YW |
383 | if (has_adapter_file(pci_slot)) |
384 | sysfs_remove_file(&pci_slot->kobj, | |
498a8faf | 385 | &hotplug_slot_attr_presence.attr); |
1da177e4 | 386 | |
a6ed1f4e YW |
387 | if (has_test_file(pci_slot)) |
388 | sysfs_remove_file(&pci_slot->kobj, &hotplug_slot_attr_test.attr); | |
c825bc94 | 389 | |
a6ed1f4e | 390 | pci_hp_remove_module_link(pci_slot); |
1da177e4 LT |
391 | } |
392 | ||
3c78bc61 | 393 | static struct hotplug_slot *get_slot_from_name(const char *name) |
1da177e4 LT |
394 | { |
395 | struct hotplug_slot *slot; | |
1da177e4 | 396 | |
2ac83ccc | 397 | list_for_each_entry(slot, &pci_hotplug_slot_list, slot_list) { |
58319b80 | 398 | if (strcmp(hotplug_slot_name(slot), name) == 0) |
95cb9093 | 399 | return slot; |
1da177e4 | 400 | } |
95cb9093 | 401 | return NULL; |
1da177e4 LT |
402 | } |
403 | ||
404 | /** | |
c825bc94 | 405 | * __pci_hp_register - register a hotplug_slot with the PCI hotplug subsystem |
65b943f6 | 406 | * @bus: bus this slot is on |
1da177e4 | 407 | * @slot: pointer to the &struct hotplug_slot to register |
c825bc94 | 408 | * @devnr: device number |
1359f270 | 409 | * @name: name registered with kobject core |
503998ca RD |
410 | * @owner: caller module owner |
411 | * @mod_name: caller module name | |
1da177e4 LT |
412 | * |
413 | * Registers a hotplug slot with the pci hotplug subsystem, which will allow | |
414 | * userspace interaction to the slot. | |
415 | * | |
416 | * Returns 0 if successful, anything else for an error. | |
417 | */ | |
c825bc94 KK |
418 | int __pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, |
419 | int devnr, const char *name, | |
420 | struct module *owner, const char *mod_name) | |
1da177e4 LT |
421 | { |
422 | int result; | |
f46753c5 | 423 | struct pci_slot *pci_slot; |
1da177e4 LT |
424 | |
425 | if (slot == NULL) | |
426 | return -ENODEV; | |
427 | if ((slot->info == NULL) || (slot->ops == NULL)) | |
428 | return -EINVAL; | |
429 | if (slot->release == NULL) { | |
227f0647 | 430 | dbg("Why are you trying to register a hotplug slot without a proper release function?\n"); |
1da177e4 LT |
431 | return -EINVAL; |
432 | } | |
433 | ||
c825bc94 KK |
434 | slot->ops->owner = owner; |
435 | slot->ops->mod_name = mod_name; | |
95cb9093 | 436 | |
c825bc94 | 437 | mutex_lock(&pci_hp_mutex); |
8344b568 AC |
438 | /* |
439 | * No problems if we call this interface from both ACPI_PCI_SLOT | |
440 | * driver and call it here again. If we've already created the | |
441 | * pci_slot, the interface will simply bump the refcount. | |
442 | */ | |
c825bc94 | 443 | pci_slot = pci_create_slot(bus, devnr, name, slot); |
95cb9093 KK |
444 | if (IS_ERR(pci_slot)) { |
445 | result = PTR_ERR(pci_slot); | |
5fe6cc60 | 446 | goto out; |
1da177e4 | 447 | } |
64dbcac3 | 448 | |
f46753c5 AC |
449 | slot->pci_slot = pci_slot; |
450 | pci_slot->hotplug = slot; | |
451 | ||
f46753c5 | 452 | list_add(&slot->slot_list, &pci_hotplug_slot_list); |
f46753c5 AC |
453 | |
454 | result = fs_add_slot(pci_slot); | |
455 | kobject_uevent(&pci_slot->kobj, KOBJ_ADD); | |
1359f270 | 456 | dbg("Added slot %s to the list\n", name); |
95cb9093 KK |
457 | out: |
458 | mutex_unlock(&pci_hp_mutex); | |
1da177e4 LT |
459 | return result; |
460 | } | |
b7fe9434 | 461 | EXPORT_SYMBOL_GPL(__pci_hp_register); |
1da177e4 LT |
462 | |
463 | /** | |
464 | * pci_hp_deregister - deregister a hotplug_slot with the PCI hotplug subsystem | |
a6ed1f4e | 465 | * @slot: pointer to the &struct hotplug_slot to deregister |
1da177e4 LT |
466 | * |
467 | * The @slot must have been registered with the pci hotplug subsystem | |
468 | * previously with a call to pci_hp_register(). | |
469 | * | |
470 | * Returns 0 if successful, anything else for an error. | |
471 | */ | |
a6ed1f4e | 472 | int pci_hp_deregister(struct hotplug_slot *slot) |
1da177e4 LT |
473 | { |
474 | struct hotplug_slot *temp; | |
a6ed1f4e | 475 | struct pci_slot *pci_slot; |
1da177e4 | 476 | |
a6ed1f4e | 477 | if (!slot) |
1da177e4 LT |
478 | return -ENODEV; |
479 | ||
95cb9093 | 480 | mutex_lock(&pci_hp_mutex); |
a6ed1f4e YW |
481 | temp = get_slot_from_name(hotplug_slot_name(slot)); |
482 | if (temp != slot) { | |
95cb9093 | 483 | mutex_unlock(&pci_hp_mutex); |
1da177e4 | 484 | return -ENODEV; |
95cb9093 | 485 | } |
1da177e4 | 486 | |
a6ed1f4e | 487 | list_del(&slot->slot_list); |
f46753c5 | 488 | |
a6ed1f4e YW |
489 | pci_slot = slot->pci_slot; |
490 | fs_remove_slot(pci_slot); | |
491 | dbg("Removed slot %s from the list\n", hotplug_slot_name(slot)); | |
f46753c5 | 492 | |
a6ed1f4e YW |
493 | slot->release(slot); |
494 | pci_slot->hotplug = NULL; | |
495 | pci_destroy_slot(pci_slot); | |
95cb9093 | 496 | mutex_unlock(&pci_hp_mutex); |
f46753c5 | 497 | |
1da177e4 LT |
498 | return 0; |
499 | } | |
b7fe9434 | 500 | EXPORT_SYMBOL_GPL(pci_hp_deregister); |
1da177e4 LT |
501 | |
502 | /** | |
503 | * pci_hp_change_slot_info - changes the slot's information structure in the core | |
a6ed1f4e | 504 | * @slot: pointer to the slot whose info has changed |
1da177e4 LT |
505 | * @info: pointer to the info copy into the slot's info structure |
506 | * | |
f7625980 | 507 | * @slot must have been registered with the pci |
1da177e4 LT |
508 | * hotplug subsystem previously with a call to pci_hp_register(). |
509 | * | |
510 | * Returns 0 if successful, anything else for an error. | |
511 | */ | |
a6ed1f4e | 512 | int pci_hp_change_slot_info(struct hotplug_slot *slot, |
d67aed63 | 513 | struct hotplug_slot_info *info) |
1da177e4 | 514 | { |
a6ed1f4e | 515 | if (!slot || !info) |
1da177e4 LT |
516 | return -ENODEV; |
517 | ||
a6ed1f4e | 518 | memcpy(slot->info, info, sizeof(struct hotplug_slot_info)); |
1da177e4 LT |
519 | |
520 | return 0; | |
521 | } | |
b7fe9434 | 522 | EXPORT_SYMBOL_GPL(pci_hp_change_slot_info); |
1da177e4 | 523 | |
3c78bc61 | 524 | static int __init pci_hotplug_init(void) |
1da177e4 LT |
525 | { |
526 | int result; | |
0fed80f7 | 527 | |
1da177e4 LT |
528 | result = cpci_hotplug_init(debug); |
529 | if (result) { | |
3c78bc61 RD |
530 | err("cpci_hotplug_init with error %d\n", result); |
531 | return result; | |
1da177e4 LT |
532 | } |
533 | ||
1da177e4 LT |
534 | return result; |
535 | } | |
57b51b9a | 536 | device_initcall(pci_hotplug_init); |
1da177e4 | 537 | |
57b51b9a PG |
538 | /* |
539 | * not really modular, but the easiest way to keep compat with existing | |
540 | * bootargs behaviour is to continue using module_param here. | |
541 | */ | |
1da177e4 LT |
542 | module_param(debug, bool, 0644); |
543 | MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); |