summaryrefslogtreecommitdiff
path: root/drivers/char/ipmi/ipmi_poweroff.c
blob: 786a2802ca34044936a11bedf9f570396531e973 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
/*
 * ipmi_poweroff.c
 *
 * MontaVista IPMI Poweroff extension to sys_reboot
 *
 * Author: MontaVista Software, Inc.
 *         Steven Dake <sdake@mvista.com>
 *         Corey Minyard <cminyard@mvista.com>
 *         source@mvista.com
 *
 * Copyright 2002,2004 MontaVista Software Inc.
 *
 *  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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 *  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 *  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 *  USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <linux/config.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/completion.h>
#include <linux/pm.h>
#include <linux/kdev_t.h>
#include <linux/ipmi.h>
#include <linux/ipmi_smi.h>

#define PFX "IPMI poweroff: "

/* Definitions for controlling power off (if the system supports it).  It
 * conveniently matches the IPMI chassis control values. */
#define IPMI_CHASSIS_POWER_DOWN		0	/* power down, the default. */
#define IPMI_CHASSIS_POWER_CYCLE	0x02	/* power cycle */

/* the IPMI data command */
static int poweroff_powercycle;

/* parameter definition to allow user to flag power cycle */
module_param(poweroff_powercycle, int, 0644);
MODULE_PARM_DESC(poweroff_powercycle, " Set to non-zero to enable power cycle instead of power down. Power cycle is contingent on hardware support, otherwise it defaults back to power down.");

/* Stuff from the get device id command. */
static unsigned int mfg_id;
static unsigned int prod_id;
static unsigned char capabilities;
static unsigned char ipmi_version;

/* We use our own messages for this operation, we don't let the system
   allocate them, since we may be in a panic situation.  The whole
   thing is single-threaded, anyway, so multiple messages are not
   required. */
static void dummy_smi_free(struct ipmi_smi_msg *msg)
{
}
static void dummy_recv_free(struct ipmi_recv_msg *msg)
{
}
static struct ipmi_smi_msg halt_smi_msg =
{
	.done = dummy_smi_free
};
static struct ipmi_recv_msg halt_recv_msg =
{
	.done = dummy_recv_free
};


/*
 * Code to send a message and wait for the reponse.
 */

static void receive_handler(struct ipmi_recv_msg *recv_msg, void *handler_data)
{
	struct completion *comp = recv_msg->user_msg_data;

	if (comp)
		complete(comp);
}

static struct ipmi_user_hndl ipmi_poweroff_handler =
{
	.ipmi_recv_hndl = receive_handler
};


static int ipmi_request_wait_for_response(ipmi_user_t            user,
					  struct ipmi_addr       *addr,
					  struct kernel_ipmi_msg *send_msg)
{
	int               rv;
	struct completion comp;

	init_completion(&comp);

	rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, &comp,
				      &halt_smi_msg, &halt_recv_msg, 0);
	if (rv)
		return rv;

	wait_for_completion(&comp);

	return halt_recv_msg.msg.data[0];
}

/* We are in run-to-completion mode, no completion is desired. */
static int ipmi_request_in_rc_mode(ipmi_user_t            user,
				   struct ipmi_addr       *addr,
				   struct kernel_ipmi_msg *send_msg)
{
	int rv;

	rv = ipmi_request_supply_msgs(user, addr, 0, send_msg, NULL,
				      &halt_smi_msg, &halt_recv_msg, 0);
	if (rv)
		return rv;

	return halt_recv_msg.msg.data[0];
}

/*
 * ATCA Support
 */

#define IPMI_NETFN_ATCA			0x2c
#define IPMI_ATCA_SET_POWER_CMD		0x11
#define IPMI_ATCA_GET_ADDR_INFO_CMD	0x01
#define IPMI_PICMG_ID			0

static int ipmi_atca_detect (ipmi_user_t user)
{
	struct ipmi_system_interface_addr smi_addr;
	struct kernel_ipmi_msg            send_msg;
	int                               rv;
	unsigned char                     data[1];

        /*
         * Configure IPMI address for local access
         */
        smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
        smi_addr.channel = IPMI_BMC_CHANNEL;
        smi_addr.lun = 0;

	/*
	 * Use get address info to check and see if we are ATCA
	 */
	send_msg.netfn = IPMI_NETFN_ATCA;
	send_msg.cmd = IPMI_ATCA_GET_ADDR_INFO_CMD;
	data[0] = IPMI_PICMG_ID;
	send_msg.data = data;
	send_msg.data_len = sizeof(data);
	rv = ipmi_request_wait_for_response(user,
					    (struct ipmi_addr *) &smi_addr,
					    &send_msg);
	return !rv;
}

static void ipmi_poweroff_atca (ipmi_user_t user)
{
	struct ipmi_system_interface_addr smi_addr;
	struct kernel_ipmi_msg            send_msg;
	int                               rv;
	unsigned char                     data[4];

        /*
         * Configure IPMI address for local access
         */
        smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
        smi_addr.channel = IPMI_BMC_CHANNEL;
        smi_addr.lun = 0;

	printk(KERN_INFO PFX "Powering down via ATCA power command\n");

	/*
	 * Power down
	 */
	send_msg.netfn = IPMI_NETFN_ATCA;
	send_msg.cmd = IPMI_ATCA_SET_POWER_CMD;
	data[0] = IPMI_PICMG_ID;
	data[1] = 0; /* FRU id */
	data[2] = 0; /* Power Level */
	data[3] = 0; /* Don't change saved presets */
	send_msg.data = data;
	send_msg.data_len = sizeof (data);
	rv = ipmi_request_in_rc_mode(user,
				     (struct ipmi_addr *) &smi_addr,
				     &send_msg);
	if (rv) {
		printk(KERN_ERR PFX "Unable to send ATCA powerdown message,"
		       " IPMI error 0x%x\n", rv);
		goto out;
	}

 out:
	return;
}

/*
 * CPI1 Support
 */

#define IPMI_NETFN_OEM_1				0xf8
#define OEM_GRP_CMD_SET_RESET_STATE		0x84
#define OEM_GRP_CMD_SET_POWER_STATE		0x82
#define IPMI_NETFN_OEM_8				0xf8
#define OEM_GRP_CMD_REQUEST_HOTSWAP_CTRL	0x80
#define OEM_GRP_CMD_GET_SLOT_GA			0xa3
#define IPMI_NETFN_SENSOR_EVT			0x10
#define IPMI_CMD_GET_EVENT_RECEIVER		0x01

#define IPMI_CPI1_PRODUCT_ID		0x000157
#define IPMI_CPI1_MANUFACTURER_ID	0x0108

static int ipmi_cpi1_detect (ipmi_user_t user)
{
	return ((mfg_id == IPMI_CPI1_MANUFACTURER_ID)
		&& (prod_id == IPMI_CPI1_PRODUCT_ID));
}

static void ipmi_poweroff_cpi1 (ipmi_user_t user)
{
	struct ipmi_system_interface_addr smi_addr;
	struct ipmi_ipmb_addr             ipmb_addr;
	struct kernel_ipmi_msg            send_msg;
	int                               rv;
	unsigned char                     data[1];
	int                               slot;
	unsigned char                     hotswap_ipmb;
	unsigned char                     aer_addr;
	unsigned char                     aer_lun;

        /*
         * Configure IPMI address for local access
         */
        smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
        smi_addr.channel = IPMI_BMC_CHANNEL;
        smi_addr.lun = 0;

	printk(KERN_INFO PFX "Powering down via CPI1 power command\n");

	/*
	 * Get IPMI ipmb address
	 */
	send_msg.netfn = IPMI_NETFN_OEM_8 >> 2;
	send_msg.cmd = OEM_GRP_CMD_GET_SLOT_GA;
	send_msg.data = NULL;
	send_msg.data_len = 0;
	rv = ipmi_request_in_rc_mode(user,
				     (struct ipmi_addr *) &smi_addr,
				     &send_msg);
	if (rv)
		goto out;
	slot = halt_recv_msg.msg.data[1];
	hotswap_ipmb = (slot > 9) ? (0xb0 + 2 * slot) : (0xae + 2 * slot);

	/*
	 * Get active event receiver
	 */
	send_msg.netfn = IPMI_NETFN_SENSOR_EVT >> 2;
	send_msg.cmd = IPMI_CMD_GET_EVENT_RECEIVER;
	send_msg.data = NULL;
	send_msg.data_len = 0;
	rv = ipmi_request_in_rc_mode(user,
				     (struct ipmi_addr *) &smi_addr,
				     &send_msg);
	if (rv)
		goto out;
	aer_addr = halt_recv_msg.msg.data[1];
	aer_lun = halt_recv_msg.msg.data[2];

	/*
	 * Setup IPMB address target instead of local target
	 */
	ipmb_addr.addr_type = IPMI_IPMB_ADDR_TYPE;
	ipmb_addr.channel = 0;
	ipmb_addr.slave_addr = aer_addr;
	ipmb_addr.lun = aer_lun;

	/*
	 * Send request hotswap control to remove blade from dpv
	 */
	send_msg.netfn = IPMI_NETFN_OEM_8 >> 2;
	send_msg.cmd = OEM_GRP_CMD_REQUEST_HOTSWAP_CTRL;
	send_msg.data = &hotswap_ipmb;
	send_msg.data_len = 1;
	ipmi_request_in_rc_mode(user,
				(struct ipmi_addr *) &ipmb_addr,
				&send_msg);

	/*
	 * Set reset asserted
	 */
	send_msg.netfn = IPMI_NETFN_OEM_1 >> 2;
	send_msg.cmd = OEM_GRP_CMD_SET_RESET_STATE;
	send_msg.data = data;
	data[0] = 1; /* Reset asserted state */
	send_msg.data_len = 1;
	rv = ipmi_request_in_rc_mode(user,
				     (struct ipmi_addr *) &smi_addr,
				     &send_msg);
	if (rv)
		goto out;

	/*
	 * Power down
	 */
	send_msg.netfn = IPMI_NETFN_OEM_1 >> 2;
	send_msg.cmd = OEM_GRP_CMD_SET_POWER_STATE;
	send_msg.data = data;
	data[0] = 1; /* Power down state */
	send_msg.data_len = 1;
	rv = ipmi_request_in_rc_mode(user,
				     (struct ipmi_addr *) &smi_addr,
				     &send_msg);
	if (rv)
		goto out;

 out:
	return;
}

/*
 * ipmi_dell_chassis_detect()
 * Dell systems with IPMI < 1.5 don't set the chassis capability bit
 * but they can handle a chassis poweroff or powercycle command.
 */

#define DELL_IANA_MFR_ID {0xA2, 0x02, 0x00}
static int ipmi_dell_chassis_detect (ipmi_user_t user)
{
	const char ipmi_version_major = ipmi_version & 0xF;
	const char ipmi_version_minor = (ipmi_version >> 4) & 0xF;
	const char mfr[3]=DELL_IANA_MFR_ID;
	if (!memcmp(mfr, &mfg_id, sizeof(mfr)) &&
	    ipmi_version_major <= 1 &&
	    ipmi_version_minor < 5)
		return 1;
	return 0;
}

/*
 * Standard chassis support
 */

#define IPMI_NETFN_CHASSIS_REQUEST	0
#define IPMI_CHASSIS_CONTROL_CMD	0x02

static int ipmi_chassis_detect (ipmi_user_t user)
{
	/* Chassis support, use it. */
	return (capabilities & 0x80);
}

static void ipmi_poweroff_chassis (ipmi_user_t user)
{
	struct ipmi_system_interface_addr smi_addr;
	struct kernel_ipmi_msg            send_msg;
	int                               rv;
	unsigned char                     data[1];

        /*
         * Configure IPMI address for local access
         */
        smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
        smi_addr.channel = IPMI_BMC_CHANNEL;
        smi_addr.lun = 0;

 powercyclefailed:
	printk(KERN_INFO PFX "Powering %s via IPMI chassis control command\n",
		(poweroff_powercycle ? "cycle" : "down"));

	/*
	 * Power down
	 */
	send_msg.netfn = IPMI_NETFN_CHASSIS_REQUEST;
	send_msg.cmd = IPMI_CHASSIS_CONTROL_CMD;
	if (poweroff_powercycle)
		data[0] = IPMI_CHASSIS_POWER_CYCLE;
	else
		data[0] = IPMI_CHASSIS_POWER_DOWN;
	send_msg.data = data;
	send_msg.data_len = sizeof(data);
	rv = ipmi_request_in_rc_mode(user,
				     (struct ipmi_addr *) &smi_addr,
				     &send_msg);
	if (rv) {
		if (poweroff_powercycle) {
			/* power cycle failed, default to power down */
			printk(KERN_ERR PFX "Unable to send chassis power " \
			       "cycle message, IPMI error 0x%x\n", rv);
			poweroff_powercycle = 0;
			goto powercyclefailed;
		}

		printk(KERN_ERR PFX "Unable to send chassis power " \
		       "down message, IPMI error 0x%x\n", rv);
	}
}


/* Table of possible power off functions. */
struct poweroff_function {
	char *platform_type;
	int  (*detect)(ipmi_user_t user);
	void (*poweroff_func)(ipmi_user_t user);
};

static struct poweroff_function poweroff_functions[] = {
	{ .platform_type	= "ATCA",
	  .detect		= ipmi_atca_detect,
	  .poweroff_func	= ipmi_poweroff_atca },
	{ .platform_type	= "CPI1",
	  .detect		= ipmi_cpi1_detect,
	  .poweroff_func	= ipmi_poweroff_cpi1 },
	{ .platform_type	= "chassis",
	  .detect		= ipmi_dell_chassis_detect,
	  .poweroff_func	= ipmi_poweroff_chassis },
	/* Chassis should generally be last, other things should override
	   it. */
	{ .platform_type	= "chassis",
	  .detect		= ipmi_chassis_detect,
	  .poweroff_func	= ipmi_poweroff_chassis },
};
#define NUM_PO_FUNCS (sizeof(poweroff_functions) \
		      / sizeof(struct poweroff_function))


/* Our local state. */
static int ready = 0;
static ipmi_user_t ipmi_user;
static void (*specific_poweroff_func)(ipmi_user_t user) = NULL;

/* Holds the old poweroff function so we can restore it on removal. */
static void (*old_poweroff_func)(void);


/* Called on a powerdown request. */
static void ipmi_poweroff_function (void)
{
	if (!ready)
		return;

	/* Use run-to-completion mode, since interrupts may be off. */
	ipmi_user_set_run_to_completion(ipmi_user, 1);
	specific_poweroff_func(ipmi_user);
	ipmi_user_set_run_to_completion(ipmi_user, 0);
}

/* Wait for an IPMI interface to be installed, the first one installed
   will be grabbed by this code and used to perform the powerdown. */
static void ipmi_po_new_smi(int if_num, struct device *device)
{
	struct ipmi_system_interface_addr smi_addr;
	struct kernel_ipmi_msg            send_msg;
	int                               rv;
	int                               i;

	if (ready)
		return;

	rv = ipmi_create_user(if_num, &ipmi_poweroff_handler, NULL,
			      &ipmi_user);
	if (rv) {
		printk(KERN_ERR PFX "could not create IPMI user, error %d\n",
		       rv);
		return;
	}

        /*
         * Do a get device ide and store some results, since this is
	 * used by several functions.
         */
        smi_addr.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
        smi_addr.channel = IPMI_BMC_CHANNEL;
        smi_addr.lun = 0;

	send_msg.netfn = IPMI_NETFN_APP_REQUEST;
	send_msg.cmd = IPMI_GET_DEVICE_ID_CMD;
	send_msg.data = NULL;
	send_msg.data_len = 0;
	rv = ipmi_request_wait_for_response(ipmi_user,
					    (struct ipmi_addr *) &smi_addr,
					    &send_msg);
	if (rv) {
		printk(KERN_ERR PFX "Unable to send IPMI get device id info,"
		       " IPMI error 0x%x\n", rv);
		goto out_err;
	}

	if (halt_recv_msg.msg.data_len < 12) {
		printk(KERN_ERR PFX "(chassis) IPMI get device id info too,"
		       " short, was %d bytes, needed %d bytes\n",
		       halt_recv_msg.msg.data_len, 12);
		goto out_err;
	}

	mfg_id = (halt_recv_msg.msg.data[7]
		  | (halt_recv_msg.msg.data[8] << 8)
		  | (halt_recv_msg.msg.data[9] << 16));
	prod_id = (halt_recv_msg.msg.data[10]
		   | (halt_recv_msg.msg.data[11] << 8));
	capabilities = halt_recv_msg.msg.data[6];
	ipmi_version = halt_recv_msg.msg.data[5];


	/* Scan for a poweroff method */
	for (i = 0; i < NUM_PO_FUNCS; i++) {
		if (poweroff_functions[i].detect(ipmi_user))
			goto found;
	}

 out_err:
	printk(KERN_ERR PFX "Unable to find a poweroff function that"
	       " will work, giving up\n");
	ipmi_destroy_user(ipmi_user);
	return;

 found:
	printk(KERN_INFO PFX "Found a %s style poweroff function\n",
	       poweroff_functions[i].platform_type);
	specific_poweroff_func = poweroff_functions[i].poweroff_func;
	old_poweroff_func = pm_power_off;
	pm_power_off = ipmi_poweroff_function;
	ready = 1;
}

static void ipmi_po_smi_gone(int if_num)
{
	/* This can never be called, because once poweroff driver is
	   registered, the interface can't go away until the power
	   driver is unregistered. */
}

static struct ipmi_smi_watcher smi_watcher =
{
	.owner    = THIS_MODULE,
	.new_smi  = ipmi_po_new_smi,
	.smi_gone = ipmi_po_smi_gone
};


#ifdef CONFIG_PROC_FS
#include <linux/sysctl.h>

static ctl_table ipmi_table[] = {
	{ .ctl_name	= DEV_IPMI_POWEROFF_POWERCYCLE,
	  .procname	= "poweroff_powercycle",
	  .data		= &poweroff_powercycle,
	  .maxlen	= sizeof(poweroff_powercycle),
	  .mode		= 0644,
	  .proc_handler	= &proc_dointvec },
	{ }
};

static ctl_table ipmi_dir_table[] = {
	{ .ctl_name	= DEV_IPMI,
	  .procname	= "ipmi",
	  .mode		= 0555,
	  .child	= ipmi_table },
	{ }
};

static ctl_table ipmi_root_table[] = {
	{ .ctl_name	= CTL_DEV,
	  .procname	= "dev",
	  .mode		= 0555,
	  .child	= ipmi_dir_table },
	{ }
};

static struct ctl_table_header *ipmi_table_header;
#endif /* CONFIG_PROC_FS */

/*
 * Startup and shutdown functions.
 */
static int ipmi_poweroff_init (void)
{
	int rv;

	printk ("Copyright (C) 2004 MontaVista Software -"
		" IPMI Powerdown via sys_reboot.\n");

	if (poweroff_powercycle)
		printk(KERN_INFO PFX "Power cycle is enabled.\n");

#ifdef CONFIG_PROC_FS
	ipmi_table_header = register_sysctl_table(ipmi_root_table, 1);
	if (!ipmi_table_header) {
		printk(KERN_ERR PFX "Unable to register powercycle sysctl\n");
		rv = -ENOMEM;
		goto out_err;
	}
#endif

	rv = ipmi_smi_watcher_register(&smi_watcher);

#ifdef CONFIG_PROC_FS
	if (rv) {
		unregister_sysctl_table(ipmi_table_header);
		printk(KERN_ERR PFX "Unable to register SMI watcher: %d\n", rv);
		goto out_err;
	}
#endif

 out_err:
	return rv;
}

#ifdef MODULE
static __exit void ipmi_poweroff_cleanup(void)
{
	int rv;

#ifdef CONFIG_PROC_FS
	unregister_sysctl_table(ipmi_table_header);
#endif

	ipmi_smi_watcher_unregister(&smi_watcher);

	if (ready) {
		rv = ipmi_destroy_user(ipmi_user);
		if (rv)
			printk(KERN_ERR PFX "could not cleanup the IPMI"
			       " user: 0x%x\n", rv);
		pm_power_off = old_poweroff_func;
	}
}
module_exit(ipmi_poweroff_cleanup);
#endif

module_init(ipmi_poweroff_init);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Corey Minyard <minyard@mvista.com>");
MODULE_DESCRIPTION("IPMI Poweroff extension to sys_reboot");