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1/*
2 * ACPI PCI Hot Plug Controller Driver
3 *
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
8 * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
9 * Copyright (C) 2002,2003 NEC Corporation
10 * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
11 * Copyright (C) 2003-2005 Hewlett Packard
12 *
13 * All rights reserved.
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or (at
18 * your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful, but
21 * WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
23 * NON INFRINGEMENT. See the GNU General Public License for more
24 * details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 *
30 * Send feedback to <kristen.c.accardi@intel.com>
31 *
32 */
33
34#define pr_fmt(fmt) "acpiphp: " fmt
35
36#include <linux/init.h>
37#include <linux/module.h>
38#include <linux/moduleparam.h>
39
40#include <linux/kernel.h>
41#include <linux/pci.h>
42#include <linux/pci-acpi.h>
43#include <linux/pci_hotplug.h>
44#include <linux/slab.h>
45#include <linux/smp.h>
46#include "acpiphp.h"
47
48/* name size which is used for entries in pcihpfs */
49#define SLOT_NAME_SIZE 21 /* {_SUN} */
50
51bool acpiphp_disabled;
52
53/* local variables */
54static struct acpiphp_attention_info *attention_info;
55
56#define DRIVER_VERSION "0.5"
57#define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kochi@bq.jp.nec.com>, Matthew Wilcox <willy@hp.com>"
58#define DRIVER_DESC "ACPI Hot Plug PCI Controller Driver"
59
60MODULE_AUTHOR(DRIVER_AUTHOR);
61MODULE_DESCRIPTION(DRIVER_DESC);
62MODULE_LICENSE("GPL");
63MODULE_PARM_DESC(disable, "disable acpiphp driver");
64module_param_named(disable, acpiphp_disabled, bool, 0444);
65
66/* export the attention callback registration methods */
67EXPORT_SYMBOL_GPL(acpiphp_register_attention);
68EXPORT_SYMBOL_GPL(acpiphp_unregister_attention);
69
70static int enable_slot (struct hotplug_slot *slot);
71static int disable_slot (struct hotplug_slot *slot);
72static int set_attention_status (struct hotplug_slot *slot, u8 value);
73static int get_power_status (struct hotplug_slot *slot, u8 *value);
74static int get_attention_status (struct hotplug_slot *slot, u8 *value);
75static int get_latch_status (struct hotplug_slot *slot, u8 *value);
76static int get_adapter_status (struct hotplug_slot *slot, u8 *value);
77
78static struct hotplug_slot_ops acpi_hotplug_slot_ops = {
79 .enable_slot = enable_slot,
80 .disable_slot = disable_slot,
81 .set_attention_status = set_attention_status,
82 .get_power_status = get_power_status,
83 .get_attention_status = get_attention_status,
84 .get_latch_status = get_latch_status,
85 .get_adapter_status = get_adapter_status,
86};
87
88/**
89 * acpiphp_register_attention - set attention LED callback
90 * @info: must be completely filled with LED callbacks
91 *
92 * Description: This is used to register a hardware specific ACPI
93 * driver that manipulates the attention LED. All the fields in
94 * info must be set.
95 */
96int acpiphp_register_attention(struct acpiphp_attention_info *info)
97{
98 int retval = -EINVAL;
99
100 if (info && info->owner && info->set_attn &&
101 info->get_attn && !attention_info) {
102 retval = 0;
103 attention_info = info;
104 }
105 return retval;
106}
107
108
109/**
110 * acpiphp_unregister_attention - unset attention LED callback
111 * @info: must match the pointer used to register
112 *
113 * Description: This is used to un-register a hardware specific acpi
114 * driver that manipulates the attention LED. The pointer to the
115 * info struct must be the same as the one used to set it.
116 */
117int acpiphp_unregister_attention(struct acpiphp_attention_info *info)
118{
119 int retval = -EINVAL;
120
121 if (info && attention_info == info) {
122 attention_info = NULL;
123 retval = 0;
124 }
125 return retval;
126}
127
128
129/**
130 * enable_slot - power on and enable a slot
131 * @hotplug_slot: slot to enable
132 *
133 * Actual tasks are done in acpiphp_enable_slot()
134 */
135static int enable_slot(struct hotplug_slot *hotplug_slot)
136{
137 struct slot *slot = hotplug_slot->private;
138
139 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
140
141 /* enable the specified slot */
142 return acpiphp_enable_slot(slot->acpi_slot);
143}
144
145
146/**
147 * disable_slot - disable and power off a slot
148 * @hotplug_slot: slot to disable
149 *
150 * Actual tasks are done in acpiphp_disable_slot()
151 */
152static int disable_slot(struct hotplug_slot *hotplug_slot)
153{
154 struct slot *slot = hotplug_slot->private;
155
156 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
157
158 /* disable the specified slot */
159 return acpiphp_disable_slot(slot->acpi_slot);
160}
161
162
163/**
164 * set_attention_status - set attention LED
165 * @hotplug_slot: slot to set attention LED on
166 * @status: value to set attention LED to (0 or 1)
167 *
168 * attention status LED, so we use a callback that
169 * was registered with us. This allows hardware specific
170 * ACPI implementations to blink the light for us.
171 */
172static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
173{
174 int retval = -ENODEV;
175
176 pr_debug("%s - physical_slot = %s\n", __func__,
177 hotplug_slot_name(hotplug_slot));
178
179 if (attention_info && try_module_get(attention_info->owner)) {
180 retval = attention_info->set_attn(hotplug_slot, status);
181 module_put(attention_info->owner);
182 } else
183 attention_info = NULL;
184 return retval;
185}
186
187
188/**
189 * get_power_status - get power status of a slot
190 * @hotplug_slot: slot to get status
191 * @value: pointer to store status
192 *
193 * Some platforms may not implement _STA method properly.
194 * In that case, the value returned may not be reliable.
195 */
196static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
197{
198 struct slot *slot = hotplug_slot->private;
199
200 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
201
202 *value = acpiphp_get_power_status(slot->acpi_slot);
203
204 return 0;
205}
206
207
208/**
209 * get_attention_status - get attention LED status
210 * @hotplug_slot: slot to get status from
211 * @value: returns with value of attention LED
212 *
213 * ACPI doesn't have known method to determine the state
214 * of the attention status LED, so we use a callback that
215 * was registered with us. This allows hardware specific
216 * ACPI implementations to determine its state.
217 */
218static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
219{
220 int retval = -EINVAL;
221
222 pr_debug("%s - physical_slot = %s\n", __func__,
223 hotplug_slot_name(hotplug_slot));
224
225 if (attention_info && try_module_get(attention_info->owner)) {
226 retval = attention_info->get_attn(hotplug_slot, value);
227 module_put(attention_info->owner);
228 } else
229 attention_info = NULL;
230 return retval;
231}
232
233
234/**
235 * get_latch_status - get latch status of a slot
236 * @hotplug_slot: slot to get status
237 * @value: pointer to store status
238 *
239 * ACPI doesn't provide any formal means to access latch status.
240 * Instead, we fake latch status from _STA.
241 */
242static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
243{
244 struct slot *slot = hotplug_slot->private;
245
246 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
247
248 *value = acpiphp_get_latch_status(slot->acpi_slot);
249
250 return 0;
251}
252
253
254/**
255 * get_adapter_status - get adapter status of a slot
256 * @hotplug_slot: slot to get status
257 * @value: pointer to store status
258 *
259 * ACPI doesn't provide any formal means to access adapter status.
260 * Instead, we fake adapter status from _STA.
261 */
262static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
263{
264 struct slot *slot = hotplug_slot->private;
265
266 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
267
268 *value = acpiphp_get_adapter_status(slot->acpi_slot);
269
270 return 0;
271}
272
273/**
274 * release_slot - free up the memory used by a slot
275 * @hotplug_slot: slot to free
276 */
277static void release_slot(struct hotplug_slot *hotplug_slot)
278{
279 struct slot *slot = hotplug_slot->private;
280
281 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
282
283 kfree(slot->hotplug_slot);
284 kfree(slot);
285}
286
287/* callback routine to initialize 'struct slot' for each slot */
288int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot,
289 unsigned int sun)
290{
291 struct slot *slot;
292 int retval = -ENOMEM;
293 char name[SLOT_NAME_SIZE];
294
295 slot = kzalloc(sizeof(*slot), GFP_KERNEL);
296 if (!slot)
297 goto error;
298
299 slot->hotplug_slot = kzalloc(sizeof(*slot->hotplug_slot), GFP_KERNEL);
300 if (!slot->hotplug_slot)
301 goto error_slot;
302
303 slot->hotplug_slot->info = &slot->info;
304
305 slot->hotplug_slot->private = slot;
306 slot->hotplug_slot->release = &release_slot;
307 slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
308
309 slot->acpi_slot = acpiphp_slot;
310 slot->hotplug_slot->info->power_status = acpiphp_get_power_status(slot->acpi_slot);
311 slot->hotplug_slot->info->attention_status = 0;
312 slot->hotplug_slot->info->latch_status = acpiphp_get_latch_status(slot->acpi_slot);
313 slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot);
314
315 acpiphp_slot->slot = slot;
316 slot->sun = sun;
317 snprintf(name, SLOT_NAME_SIZE, "%u", sun);
318
319 retval = pci_hp_register(slot->hotplug_slot, acpiphp_slot->bus,
320 acpiphp_slot->device, name);
321 if (retval == -EBUSY)
322 goto error_hpslot;
323 if (retval) {
324 pr_err("pci_hp_register failed with error %d\n", retval);
325 goto error_hpslot;
326 }
327
328 pr_info("Slot [%s] registered\n", slot_name(slot));
329
330 return 0;
331error_hpslot:
332 kfree(slot->hotplug_slot);
333error_slot:
334 kfree(slot);
335error:
336 return retval;
337}
338
339
340void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
341{
342 struct slot *slot = acpiphp_slot->slot;
343 int retval = 0;
344
345 pr_info("Slot [%s] unregistered\n", slot_name(slot));
346
347 retval = pci_hp_deregister(slot->hotplug_slot);
348 if (retval)
349 pr_err("pci_hp_deregister failed with error %d\n", retval);
350}
351
352
353void __init acpiphp_init(void)
354{
355 pr_info(DRIVER_DESC " version: " DRIVER_VERSION "%s\n",
356 acpiphp_disabled ? ", disabled by user; please report a bug"
357 : "");
358}
1/*
2 * ACPI PCI Hot Plug Controller Driver
3 *
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
8 * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
9 * Copyright (C) 2002,2003 NEC Corporation
10 * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
11 * Copyright (C) 2003-2005 Hewlett Packard
12 *
13 * All rights reserved.
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or (at
18 * your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful, but
21 * WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
23 * NON INFRINGEMENT. See the GNU General Public License for more
24 * details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 *
30 * Send feedback to <kristen.c.accardi@intel.com>
31 *
32 */
33
34#define pr_fmt(fmt) "acpiphp: " fmt
35
36#include <linux/init.h>
37#include <linux/module.h>
38#include <linux/moduleparam.h>
39
40#include <linux/kernel.h>
41#include <linux/pci.h>
42#include <linux/pci-acpi.h>
43#include <linux/pci_hotplug.h>
44#include <linux/slab.h>
45#include <linux/smp.h>
46#include "acpiphp.h"
47
48/* name size which is used for entries in pcihpfs */
49#define SLOT_NAME_SIZE 21 /* {_SUN} */
50
51bool acpiphp_disabled;
52
53/* local variables */
54static struct acpiphp_attention_info *attention_info;
55
56#define DRIVER_VERSION "0.5"
57#define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@us.ibm.com>, Takayoshi Kochi <t-kochi@bq.jp.nec.com>, Matthew Wilcox <willy@hp.com>"
58#define DRIVER_DESC "ACPI Hot Plug PCI Controller Driver"
59
60MODULE_AUTHOR(DRIVER_AUTHOR);
61MODULE_DESCRIPTION(DRIVER_DESC);
62MODULE_LICENSE("GPL");
63MODULE_PARM_DESC(disable, "disable acpiphp driver");
64module_param_named(disable, acpiphp_disabled, bool, 0444);
65
66static int enable_slot(struct hotplug_slot *slot);
67static int disable_slot(struct hotplug_slot *slot);
68static int set_attention_status(struct hotplug_slot *slot, u8 value);
69static int get_power_status(struct hotplug_slot *slot, u8 *value);
70static int get_attention_status(struct hotplug_slot *slot, u8 *value);
71static int get_latch_status(struct hotplug_slot *slot, u8 *value);
72static int get_adapter_status(struct hotplug_slot *slot, u8 *value);
73
74static struct hotplug_slot_ops acpi_hotplug_slot_ops = {
75 .enable_slot = enable_slot,
76 .disable_slot = disable_slot,
77 .set_attention_status = set_attention_status,
78 .get_power_status = get_power_status,
79 .get_attention_status = get_attention_status,
80 .get_latch_status = get_latch_status,
81 .get_adapter_status = get_adapter_status,
82};
83
84/**
85 * acpiphp_register_attention - set attention LED callback
86 * @info: must be completely filled with LED callbacks
87 *
88 * Description: This is used to register a hardware specific ACPI
89 * driver that manipulates the attention LED. All the fields in
90 * info must be set.
91 */
92int acpiphp_register_attention(struct acpiphp_attention_info *info)
93{
94 int retval = -EINVAL;
95
96 if (info && info->owner && info->set_attn &&
97 info->get_attn && !attention_info) {
98 retval = 0;
99 attention_info = info;
100 }
101 return retval;
102}
103EXPORT_SYMBOL_GPL(acpiphp_register_attention);
104
105
106/**
107 * acpiphp_unregister_attention - unset attention LED callback
108 * @info: must match the pointer used to register
109 *
110 * Description: This is used to un-register a hardware specific acpi
111 * driver that manipulates the attention LED. The pointer to the
112 * info struct must be the same as the one used to set it.
113 */
114int acpiphp_unregister_attention(struct acpiphp_attention_info *info)
115{
116 int retval = -EINVAL;
117
118 if (info && attention_info == info) {
119 attention_info = NULL;
120 retval = 0;
121 }
122 return retval;
123}
124EXPORT_SYMBOL_GPL(acpiphp_unregister_attention);
125
126
127/**
128 * enable_slot - power on and enable a slot
129 * @hotplug_slot: slot to enable
130 *
131 * Actual tasks are done in acpiphp_enable_slot()
132 */
133static int enable_slot(struct hotplug_slot *hotplug_slot)
134{
135 struct slot *slot = hotplug_slot->private;
136
137 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
138
139 /* enable the specified slot */
140 return acpiphp_enable_slot(slot->acpi_slot);
141}
142
143
144/**
145 * disable_slot - disable and power off a slot
146 * @hotplug_slot: slot to disable
147 *
148 * Actual tasks are done in acpiphp_disable_slot()
149 */
150static int disable_slot(struct hotplug_slot *hotplug_slot)
151{
152 struct slot *slot = hotplug_slot->private;
153
154 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
155
156 /* disable the specified slot */
157 return acpiphp_disable_slot(slot->acpi_slot);
158}
159
160
161/**
162 * set_attention_status - set attention LED
163 * @hotplug_slot: slot to set attention LED on
164 * @status: value to set attention LED to (0 or 1)
165 *
166 * attention status LED, so we use a callback that
167 * was registered with us. This allows hardware specific
168 * ACPI implementations to blink the light for us.
169 */
170static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
171{
172 int retval = -ENODEV;
173
174 pr_debug("%s - physical_slot = %s\n", __func__,
175 hotplug_slot_name(hotplug_slot));
176
177 if (attention_info && try_module_get(attention_info->owner)) {
178 retval = attention_info->set_attn(hotplug_slot, status);
179 module_put(attention_info->owner);
180 } else
181 attention_info = NULL;
182 return retval;
183}
184
185
186/**
187 * get_power_status - get power status of a slot
188 * @hotplug_slot: slot to get status
189 * @value: pointer to store status
190 *
191 * Some platforms may not implement _STA method properly.
192 * In that case, the value returned may not be reliable.
193 */
194static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
195{
196 struct slot *slot = hotplug_slot->private;
197
198 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
199
200 *value = acpiphp_get_power_status(slot->acpi_slot);
201
202 return 0;
203}
204
205
206/**
207 * get_attention_status - get attention LED status
208 * @hotplug_slot: slot to get status from
209 * @value: returns with value of attention LED
210 *
211 * ACPI doesn't have known method to determine the state
212 * of the attention status LED, so we use a callback that
213 * was registered with us. This allows hardware specific
214 * ACPI implementations to determine its state.
215 */
216static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
217{
218 int retval = -EINVAL;
219
220 pr_debug("%s - physical_slot = %s\n", __func__,
221 hotplug_slot_name(hotplug_slot));
222
223 if (attention_info && try_module_get(attention_info->owner)) {
224 retval = attention_info->get_attn(hotplug_slot, value);
225 module_put(attention_info->owner);
226 } else
227 attention_info = NULL;
228 return retval;
229}
230
231
232/**
233 * get_latch_status - get latch status of a slot
234 * @hotplug_slot: slot to get status
235 * @value: pointer to store status
236 *
237 * ACPI doesn't provide any formal means to access latch status.
238 * Instead, we fake latch status from _STA.
239 */
240static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
241{
242 struct slot *slot = hotplug_slot->private;
243
244 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
245
246 *value = acpiphp_get_latch_status(slot->acpi_slot);
247
248 return 0;
249}
250
251
252/**
253 * get_adapter_status - get adapter status of a slot
254 * @hotplug_slot: slot to get status
255 * @value: pointer to store status
256 *
257 * ACPI doesn't provide any formal means to access adapter status.
258 * Instead, we fake adapter status from _STA.
259 */
260static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
261{
262 struct slot *slot = hotplug_slot->private;
263
264 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
265
266 *value = acpiphp_get_adapter_status(slot->acpi_slot);
267
268 return 0;
269}
270
271/**
272 * release_slot - free up the memory used by a slot
273 * @hotplug_slot: slot to free
274 */
275static void release_slot(struct hotplug_slot *hotplug_slot)
276{
277 struct slot *slot = hotplug_slot->private;
278
279 pr_debug("%s - physical_slot = %s\n", __func__, slot_name(slot));
280
281 kfree(slot->hotplug_slot);
282 kfree(slot);
283}
284
285/* callback routine to initialize 'struct slot' for each slot */
286int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot,
287 unsigned int sun)
288{
289 struct slot *slot;
290 int retval = -ENOMEM;
291 char name[SLOT_NAME_SIZE];
292
293 slot = kzalloc(sizeof(*slot), GFP_KERNEL);
294 if (!slot)
295 goto error;
296
297 slot->hotplug_slot = kzalloc(sizeof(*slot->hotplug_slot), GFP_KERNEL);
298 if (!slot->hotplug_slot)
299 goto error_slot;
300
301 slot->hotplug_slot->info = &slot->info;
302
303 slot->hotplug_slot->private = slot;
304 slot->hotplug_slot->release = &release_slot;
305 slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
306
307 slot->acpi_slot = acpiphp_slot;
308 slot->hotplug_slot->info->power_status = acpiphp_get_power_status(slot->acpi_slot);
309 slot->hotplug_slot->info->attention_status = 0;
310 slot->hotplug_slot->info->latch_status = acpiphp_get_latch_status(slot->acpi_slot);
311 slot->hotplug_slot->info->adapter_status = acpiphp_get_adapter_status(slot->acpi_slot);
312
313 acpiphp_slot->slot = slot;
314 slot->sun = sun;
315 snprintf(name, SLOT_NAME_SIZE, "%u", sun);
316
317 retval = pci_hp_register(slot->hotplug_slot, acpiphp_slot->bus,
318 acpiphp_slot->device, name);
319 if (retval == -EBUSY)
320 goto error_hpslot;
321 if (retval) {
322 pr_err("pci_hp_register failed with error %d\n", retval);
323 goto error_hpslot;
324 }
325
326 pr_info("Slot [%s] registered\n", slot_name(slot));
327
328 return 0;
329error_hpslot:
330 kfree(slot->hotplug_slot);
331error_slot:
332 kfree(slot);
333error:
334 return retval;
335}
336
337
338void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *acpiphp_slot)
339{
340 struct slot *slot = acpiphp_slot->slot;
341 int retval = 0;
342
343 pr_info("Slot [%s] unregistered\n", slot_name(slot));
344
345 retval = pci_hp_deregister(slot->hotplug_slot);
346 if (retval)
347 pr_err("pci_hp_deregister failed with error %d\n", retval);
348}
349
350
351void __init acpiphp_init(void)
352{
353 pr_info(DRIVER_DESC " version: " DRIVER_VERSION "%s\n",
354 acpiphp_disabled ? ", disabled by user; please report a bug"
355 : "");
356}