ide: ide_unregister() locking bugfix
[linux-3.10.git] / drivers / ide / ide.c
1 /*
2  *  Copyright (C) 1994-1998         Linus Torvalds & authors (see below)
3  *  Copyrifht (C) 2003-2005, 2007   Bartlomiej Zolnierkiewicz
4  */
5
6 /*
7  *  Mostly written by Mark Lord  <mlord@pobox.com>
8  *                and Gadi Oxman <gadio@netvision.net.il>
9  *                and Andre Hedrick <andre@linux-ide.org>
10  *
11  *  See linux/MAINTAINERS for address of current maintainer.
12  *
13  * This is the multiple IDE interface driver, as evolved from hd.c.
14  * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs
15  *   (usually 14 & 15).
16  * There can be up to two drives per interface, as per the ATA-2 spec.
17  *
18  * ...
19  *
20  *  From hd.c:
21  *  |
22  *  | It traverses the request-list, using interrupts to jump between functions.
23  *  | As nearly all functions can be called within interrupts, we may not sleep.
24  *  | Special care is recommended.  Have Fun!
25  *  |
26  *  | modified by Drew Eckhardt to check nr of hd's from the CMOS.
27  *  |
28  *  | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
29  *  | in the early extended-partition checks and added DM partitions.
30  *  |
31  *  | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI).
32  *  |
33  *  | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads",
34  *  | and general streamlining by Mark Lord (mlord@pobox.com).
35  *
36  *  October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by:
37  *
38  *      Mark Lord       (mlord@pobox.com)               (IDE Perf.Pkg)
39  *      Delman Lee      (delman@ieee.org)               ("Mr. atdisk2")
40  *      Scott Snyder    (snyder@fnald0.fnal.gov)        (ATAPI IDE cd-rom)
41  *
42  *  This was a rewrite of just about everything from hd.c, though some original
43  *  code is still sprinkled about.  Think of it as a major evolution, with
44  *  inspiration from lots of linux users, esp.  hamish@zot.apana.org.au
45  */
46
47 #define _IDE_C                  /* Tell ide.h it's really us */
48
49 #include <linux/module.h>
50 #include <linux/types.h>
51 #include <linux/string.h>
52 #include <linux/kernel.h>
53 #include <linux/timer.h>
54 #include <linux/mm.h>
55 #include <linux/interrupt.h>
56 #include <linux/major.h>
57 #include <linux/errno.h>
58 #include <linux/genhd.h>
59 #include <linux/blkpg.h>
60 #include <linux/slab.h>
61 #include <linux/init.h>
62 #include <linux/pci.h>
63 #include <linux/delay.h>
64 #include <linux/ide.h>
65 #include <linux/completion.h>
66 #include <linux/reboot.h>
67 #include <linux/cdrom.h>
68 #include <linux/seq_file.h>
69 #include <linux/device.h>
70 #include <linux/bitops.h>
71
72 #include <asm/byteorder.h>
73 #include <asm/irq.h>
74 #include <asm/uaccess.h>
75 #include <asm/io.h>
76
77
78 /* default maximum number of failures */
79 #define IDE_DEFAULT_MAX_FAILURES        1
80
81 struct class *ide_port_class;
82
83 static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR,
84                                         IDE2_MAJOR, IDE3_MAJOR,
85                                         IDE4_MAJOR, IDE5_MAJOR,
86                                         IDE6_MAJOR, IDE7_MAJOR,
87                                         IDE8_MAJOR, IDE9_MAJOR };
88
89 static int idebus_parameter;    /* holds the "idebus=" parameter */
90 static int system_bus_speed;    /* holds what we think is VESA/PCI bus speed */
91
92 DEFINE_MUTEX(ide_cfg_mtx);
93  __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock);
94
95 int noautodma = 0;
96
97 ide_hwif_t ide_hwifs[MAX_HWIFS];        /* master data repository */
98
99 static void ide_port_init_devices_data(ide_hwif_t *);
100
101 /*
102  * Do not even *think* about calling this!
103  */
104 void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
105 {
106         /* bulk initialize hwif & drive info with zeros */
107         memset(hwif, 0, sizeof(ide_hwif_t));
108
109         /* fill in any non-zero initial values */
110         hwif->index     = index;
111         hwif->major     = ide_hwif_to_major[index];
112
113         hwif->name[0]   = 'i';
114         hwif->name[1]   = 'd';
115         hwif->name[2]   = 'e';
116         hwif->name[3]   = '0' + index;
117
118         hwif->bus_state = BUSSTATE_ON;
119
120         init_completion(&hwif->gendev_rel_comp);
121
122         default_hwif_iops(hwif);
123         default_hwif_transport(hwif);
124
125         ide_port_init_devices_data(hwif);
126 }
127 EXPORT_SYMBOL_GPL(ide_init_port_data);
128
129 static void ide_port_init_devices_data(ide_hwif_t *hwif)
130 {
131         int unit;
132
133         for (unit = 0; unit < MAX_DRIVES; ++unit) {
134                 ide_drive_t *drive = &hwif->drives[unit];
135                 u8 j = (hwif->index * MAX_DRIVES) + unit;
136
137                 memset(drive, 0, sizeof(*drive));
138
139                 drive->media                    = ide_disk;
140                 drive->select.all               = (unit<<4)|0xa0;
141                 drive->hwif                     = hwif;
142                 drive->ctl                      = 0x08;
143                 drive->ready_stat               = READY_STAT;
144                 drive->bad_wstat                = BAD_W_STAT;
145                 drive->special.b.recalibrate    = 1;
146                 drive->special.b.set_geometry   = 1;
147                 drive->name[0]                  = 'h';
148                 drive->name[1]                  = 'd';
149                 drive->name[2]                  = 'a' + j;
150                 drive->max_failures             = IDE_DEFAULT_MAX_FAILURES;
151
152                 INIT_LIST_HEAD(&drive->list);
153                 init_completion(&drive->gendev_rel_comp);
154         }
155 }
156
157 /*
158  * init_ide_data() sets reasonable default values into all fields
159  * of all instances of the hwifs and drives, but only on the first call.
160  * Subsequent calls have no effect (they don't wipe out anything).
161  *
162  * This routine is normally called at driver initialization time,
163  * but may also be called MUCH earlier during kernel "command-line"
164  * parameter processing.  As such, we cannot depend on any other parts
165  * of the kernel (such as memory allocation) to be functioning yet.
166  *
167  * This is too bad, as otherwise we could dynamically allocate the
168  * ide_drive_t structs as needed, rather than always consuming memory
169  * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them.
170  *
171  * FIXME: We should stuff the setup data into __init and copy the
172  * relevant hwifs/allocate them properly during boot.
173  */
174 #define MAGIC_COOKIE 0x12345678
175 static void __init init_ide_data (void)
176 {
177         unsigned int index;
178         static unsigned long magic_cookie = MAGIC_COOKIE;
179
180         if (magic_cookie != MAGIC_COOKIE)
181                 return;         /* already initialized */
182         magic_cookie = 0;
183
184         /* Initialise all interface structures */
185         for (index = 0; index < MAX_HWIFS; ++index) {
186                 ide_hwif_t *hwif = &ide_hwifs[index];
187
188                 ide_init_port_data(hwif, index);
189         }
190 }
191
192 /**
193  *      ide_system_bus_speed    -       guess bus speed
194  *
195  *      ide_system_bus_speed() returns what we think is the system VESA/PCI
196  *      bus speed (in MHz). This is used for calculating interface PIO timings.
197  *      The default is 40 for known PCI systems, 50 otherwise.
198  *      The "idebus=xx" parameter can be used to override this value.
199  *      The actual value to be used is computed/displayed the first time
200  *      through. Drivers should only use this as a last resort.
201  *
202  *      Returns a guessed speed in MHz.
203  */
204
205 static int ide_system_bus_speed(void)
206 {
207 #ifdef CONFIG_PCI
208         static struct pci_device_id pci_default[] = {
209                 { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) },
210                 { }
211         };
212 #else
213 #define pci_default 0
214 #endif /* CONFIG_PCI */
215
216         /* user supplied value */
217         if (idebus_parameter)
218                 return idebus_parameter;
219
220         /* safe default value for PCI or VESA and PCI*/
221         return pci_dev_present(pci_default) ? 33 : 50;
222 }
223
224 void ide_remove_port_from_hwgroup(ide_hwif_t *hwif)
225 {
226         ide_hwgroup_t *hwgroup = hwif->hwgroup;
227
228         spin_lock_irq(&ide_lock);
229         /*
230          * Remove us from the hwgroup, and free
231          * the hwgroup if we were the only member
232          */
233         if (hwif->next == hwif) {
234                 BUG_ON(hwgroup->hwif != hwif);
235                 kfree(hwgroup);
236         } else {
237                 /* There is another interface in hwgroup.
238                  * Unlink us, and set hwgroup->drive and ->hwif to
239                  * something sane.
240                  */
241                 ide_hwif_t *g = hwgroup->hwif;
242
243                 while (g->next != hwif)
244                         g = g->next;
245                 g->next = hwif->next;
246                 if (hwgroup->hwif == hwif) {
247                         /* Chose a random hwif for hwgroup->hwif.
248                          * It's guaranteed that there are no drives
249                          * left in the hwgroup.
250                          */
251                         BUG_ON(hwgroup->drive != NULL);
252                         hwgroup->hwif = g;
253                 }
254                 BUG_ON(hwgroup->hwif == hwif);
255         }
256         spin_unlock_irq(&ide_lock);
257 }
258
259 /* Called with ide_lock held. */
260 static void __ide_port_unregister_devices(ide_hwif_t *hwif)
261 {
262         int i;
263
264         for (i = 0; i < MAX_DRIVES; i++) {
265                 ide_drive_t *drive = &hwif->drives[i];
266
267                 if (drive->present) {
268                         spin_unlock_irq(&ide_lock);
269                         device_unregister(&drive->gendev);
270                         wait_for_completion(&drive->gendev_rel_comp);
271                         spin_lock_irq(&ide_lock);
272                 }
273         }
274 }
275
276 void ide_port_unregister_devices(ide_hwif_t *hwif)
277 {
278         mutex_lock(&ide_cfg_mtx);
279         spin_lock_irq(&ide_lock);
280         __ide_port_unregister_devices(hwif);
281         hwif->present = 0;
282         ide_port_init_devices_data(hwif);
283         spin_unlock_irq(&ide_lock);
284         mutex_unlock(&ide_cfg_mtx);
285 }
286 EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
287
288 /**
289  *      ide_unregister          -       free an IDE interface
290  *      @hwif: IDE interface
291  *
292  *      Perform the final unregister of an IDE interface. At the moment
293  *      we don't refcount interfaces so this will also get split up.
294  *
295  *      Locking:
296  *      The caller must not hold the IDE locks
297  *      The drive present/vanishing is not yet properly locked
298  *      Take care with the callbacks. These have been split to avoid
299  *      deadlocking the IDE layer. The shutdown callback is called
300  *      before we take the lock and free resources. It is up to the
301  *      caller to be sure there is no pending I/O here, and that
302  *      the interface will not be reopened (present/vanishing locking
303  *      isn't yet done BTW). After we commit to the final kill we
304  *      call the cleanup callback with the ide locks held.
305  *
306  *      Unregister restores the hwif structures to the default state.
307  *      This is raving bonkers.
308  */
309
310 void ide_unregister(ide_hwif_t *hwif)
311 {
312         ide_hwif_t *g;
313         ide_hwgroup_t *hwgroup;
314         int irq_count = 0;
315
316         BUG_ON(in_interrupt());
317         BUG_ON(irqs_disabled());
318
319         mutex_lock(&ide_cfg_mtx);
320
321         spin_lock_irq(&ide_lock);
322         if (hwif->present) {
323                 __ide_port_unregister_devices(hwif);
324                 hwif->present = 0;
325         }
326         spin_unlock_irq(&ide_lock);
327
328         ide_proc_unregister_port(hwif);
329
330         hwgroup = hwif->hwgroup;
331         /*
332          * free the irq if we were the only hwif using it
333          */
334         g = hwgroup->hwif;
335         do {
336                 if (g->irq == hwif->irq)
337                         ++irq_count;
338                 g = g->next;
339         } while (g != hwgroup->hwif);
340         if (irq_count == 1)
341                 free_irq(hwif->irq, hwgroup);
342
343         ide_remove_port_from_hwgroup(hwif);
344
345         device_unregister(hwif->portdev);
346         device_unregister(&hwif->gendev);
347         wait_for_completion(&hwif->gendev_rel_comp);
348
349         /*
350          * Remove us from the kernel's knowledge
351          */
352         blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
353         kfree(hwif->sg_table);
354         unregister_blkdev(hwif->major, hwif->name);
355
356         if (hwif->dma_base)
357                 ide_release_dma_engine(hwif);
358
359         spin_lock_irq(&ide_lock);
360         /* restore hwif data to pristine status */
361         ide_init_port_data(hwif, hwif->index);
362         spin_unlock_irq(&ide_lock);
363
364         mutex_unlock(&ide_cfg_mtx);
365 }
366
367 EXPORT_SYMBOL(ide_unregister);
368
369 void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
370 {
371         memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
372         hwif->irq = hw->irq;
373         hwif->chipset = hw->chipset;
374         hwif->gendev.parent = hw->dev;
375         hwif->ack_intr = hw->ack_intr;
376 }
377 EXPORT_SYMBOL_GPL(ide_init_port_hw);
378
379 /*
380  *      Locks for IDE setting functionality
381  */
382
383 DEFINE_MUTEX(ide_setting_mtx);
384
385 EXPORT_SYMBOL_GPL(ide_setting_mtx);
386
387 /**
388  *      ide_spin_wait_hwgroup   -       wait for group
389  *      @drive: drive in the group
390  *
391  *      Wait for an IDE device group to go non busy and then return
392  *      holding the ide_lock which guards the hwgroup->busy status
393  *      and right to use it.
394  */
395
396 int ide_spin_wait_hwgroup (ide_drive_t *drive)
397 {
398         ide_hwgroup_t *hwgroup = HWGROUP(drive);
399         unsigned long timeout = jiffies + (3 * HZ);
400
401         spin_lock_irq(&ide_lock);
402
403         while (hwgroup->busy) {
404                 unsigned long lflags;
405                 spin_unlock_irq(&ide_lock);
406                 local_irq_set(lflags);
407                 if (time_after(jiffies, timeout)) {
408                         local_irq_restore(lflags);
409                         printk(KERN_ERR "%s: channel busy\n", drive->name);
410                         return -EBUSY;
411                 }
412                 local_irq_restore(lflags);
413                 spin_lock_irq(&ide_lock);
414         }
415         return 0;
416 }
417
418 EXPORT_SYMBOL(ide_spin_wait_hwgroup);
419
420 int set_io_32bit(ide_drive_t *drive, int arg)
421 {
422         if (drive->no_io_32bit)
423                 return -EPERM;
424
425         if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
426                 return -EINVAL;
427
428         if (ide_spin_wait_hwgroup(drive))
429                 return -EBUSY;
430
431         drive->io_32bit = arg;
432
433         spin_unlock_irq(&ide_lock);
434
435         return 0;
436 }
437
438 static int set_ksettings(ide_drive_t *drive, int arg)
439 {
440         if (arg < 0 || arg > 1)
441                 return -EINVAL;
442
443         if (ide_spin_wait_hwgroup(drive))
444                 return -EBUSY;
445         drive->keep_settings = arg;
446         spin_unlock_irq(&ide_lock);
447
448         return 0;
449 }
450
451 int set_using_dma(ide_drive_t *drive, int arg)
452 {
453 #ifdef CONFIG_BLK_DEV_IDEDMA
454         ide_hwif_t *hwif = drive->hwif;
455         int err = -EPERM;
456
457         if (arg < 0 || arg > 1)
458                 return -EINVAL;
459
460         if (!drive->id || !(drive->id->capability & 1))
461                 goto out;
462
463         if (hwif->dma_ops == NULL)
464                 goto out;
465
466         err = -EBUSY;
467         if (ide_spin_wait_hwgroup(drive))
468                 goto out;
469         /*
470          * set ->busy flag, unlock and let it ride
471          */
472         hwif->hwgroup->busy = 1;
473         spin_unlock_irq(&ide_lock);
474
475         err = 0;
476
477         if (arg) {
478                 if (ide_set_dma(drive))
479                         err = -EIO;
480         } else
481                 ide_dma_off(drive);
482
483         /*
484          * lock, clear ->busy flag and unlock before leaving
485          */
486         spin_lock_irq(&ide_lock);
487         hwif->hwgroup->busy = 0;
488         spin_unlock_irq(&ide_lock);
489 out:
490         return err;
491 #else
492         if (arg < 0 || arg > 1)
493                 return -EINVAL;
494
495         return -EPERM;
496 #endif
497 }
498
499 int set_pio_mode(ide_drive_t *drive, int arg)
500 {
501         struct request rq;
502         ide_hwif_t *hwif = drive->hwif;
503         const struct ide_port_ops *port_ops = hwif->port_ops;
504
505         if (arg < 0 || arg > 255)
506                 return -EINVAL;
507
508         if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
509             (hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
510                 return -ENOSYS;
511
512         if (drive->special.b.set_tune)
513                 return -EBUSY;
514
515         ide_init_drive_cmd(&rq);
516         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
517
518         drive->tune_req = (u8) arg;
519         drive->special.b.set_tune = 1;
520         (void) ide_do_drive_cmd(drive, &rq, ide_wait);
521         return 0;
522 }
523
524 static int set_unmaskirq(ide_drive_t *drive, int arg)
525 {
526         if (drive->no_unmask)
527                 return -EPERM;
528
529         if (arg < 0 || arg > 1)
530                 return -EINVAL;
531
532         if (ide_spin_wait_hwgroup(drive))
533                 return -EBUSY;
534         drive->unmask = arg;
535         spin_unlock_irq(&ide_lock);
536
537         return 0;
538 }
539
540 /**
541  *      system_bus_clock        -       clock guess
542  *
543  *      External version of the bus clock guess used by very old IDE drivers
544  *      for things like VLB timings. Should not be used.
545  */
546
547 int system_bus_clock (void)
548 {
549         return system_bus_speed;
550 }
551
552 EXPORT_SYMBOL(system_bus_clock);
553
554 static int generic_ide_suspend(struct device *dev, pm_message_t mesg)
555 {
556         ide_drive_t *drive = dev->driver_data;
557         ide_hwif_t *hwif = HWIF(drive);
558         struct request rq;
559         struct request_pm_state rqpm;
560         ide_task_t args;
561         int ret;
562
563         /* Call ACPI _GTM only once */
564         if (!(drive->dn % 2))
565                 ide_acpi_get_timing(hwif);
566
567         blk_rq_init(NULL, &rq);
568         memset(&rqpm, 0, sizeof(rqpm));
569         memset(&args, 0, sizeof(args));
570         rq.cmd_type = REQ_TYPE_PM_SUSPEND;
571         rq.special = &args;
572         rq.data = &rqpm;
573         rqpm.pm_step = ide_pm_state_start_suspend;
574         if (mesg.event == PM_EVENT_PRETHAW)
575                 mesg.event = PM_EVENT_FREEZE;
576         rqpm.pm_state = mesg.event;
577
578         ret = ide_do_drive_cmd(drive, &rq, ide_wait);
579         /* only call ACPI _PS3 after both drivers are suspended */
580         if (!ret && (((drive->dn % 2) && hwif->drives[0].present
581                  && hwif->drives[1].present)
582                  || !hwif->drives[0].present
583                  || !hwif->drives[1].present))
584                 ide_acpi_set_state(hwif, 0);
585         return ret;
586 }
587
588 static int generic_ide_resume(struct device *dev)
589 {
590         ide_drive_t *drive = dev->driver_data;
591         ide_hwif_t *hwif = HWIF(drive);
592         struct request rq;
593         struct request_pm_state rqpm;
594         ide_task_t args;
595         int err;
596
597         /* Call ACPI _STM only once */
598         if (!(drive->dn % 2)) {
599                 ide_acpi_set_state(hwif, 1);
600                 ide_acpi_push_timing(hwif);
601         }
602
603         ide_acpi_exec_tfs(drive);
604
605         blk_rq_init(NULL, &rq);
606         memset(&rqpm, 0, sizeof(rqpm));
607         memset(&args, 0, sizeof(args));
608         rq.cmd_type = REQ_TYPE_PM_RESUME;
609         rq.special = &args;
610         rq.data = &rqpm;
611         rqpm.pm_step = ide_pm_state_start_resume;
612         rqpm.pm_state = PM_EVENT_ON;
613
614         err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
615
616         if (err == 0 && dev->driver) {
617                 ide_driver_t *drv = to_ide_driver(dev->driver);
618
619                 if (drv->resume)
620                         drv->resume(drive);
621         }
622
623         return err;
624 }
625
626 int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
627                         unsigned int cmd, unsigned long arg)
628 {
629         unsigned long flags;
630         ide_driver_t *drv;
631         void __user *p = (void __user *)arg;
632         int err = 0, (*setfunc)(ide_drive_t *, int);
633         u8 *val;
634
635         switch (cmd) {
636         case HDIO_GET_32BIT:        val = &drive->io_32bit;      goto read_val;
637         case HDIO_GET_KEEPSETTINGS: val = &drive->keep_settings; goto read_val;
638         case HDIO_GET_UNMASKINTR:   val = &drive->unmask;        goto read_val;
639         case HDIO_GET_DMA:          val = &drive->using_dma;     goto read_val;
640         case HDIO_SET_32BIT:        setfunc = set_io_32bit;      goto set_val;
641         case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings;     goto set_val;
642         case HDIO_SET_PIO_MODE:     setfunc = set_pio_mode;      goto set_val;
643         case HDIO_SET_UNMASKINTR:   setfunc = set_unmaskirq;     goto set_val;
644         case HDIO_SET_DMA:          setfunc = set_using_dma;     goto set_val;
645         }
646
647         switch (cmd) {
648                 case HDIO_OBSOLETE_IDENTITY:
649                 case HDIO_GET_IDENTITY:
650                         if (bdev != bdev->bd_contains)
651                                 return -EINVAL;
652                         if (drive->id_read == 0)
653                                 return -ENOMSG;
654                         if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142))
655                                 return -EFAULT;
656                         return 0;
657
658                 case HDIO_GET_NICE:
659                         return put_user(drive->dsc_overlap      <<      IDE_NICE_DSC_OVERLAP    |
660                                         drive->atapi_overlap    <<      IDE_NICE_ATAPI_OVERLAP  |
661                                         drive->nice1 << IDE_NICE_1,
662                                         (long __user *) arg);
663 #ifdef CONFIG_IDE_TASK_IOCTL
664                 case HDIO_DRIVE_TASKFILE:
665                         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
666                                 return -EACCES;
667                         switch(drive->media) {
668                                 case ide_disk:
669                                         return ide_taskfile_ioctl(drive, cmd, arg);
670                                 default:
671                                         return -ENOMSG;
672                         }
673 #endif /* CONFIG_IDE_TASK_IOCTL */
674
675                 case HDIO_DRIVE_CMD:
676                         if (!capable(CAP_SYS_RAWIO))
677                                 return -EACCES;
678                         return ide_cmd_ioctl(drive, cmd, arg);
679
680                 case HDIO_DRIVE_TASK:
681                         if (!capable(CAP_SYS_RAWIO))
682                                 return -EACCES;
683                         return ide_task_ioctl(drive, cmd, arg);
684                 case HDIO_SET_NICE:
685                         if (!capable(CAP_SYS_ADMIN)) return -EACCES;
686                         if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1))))
687                                 return -EPERM;
688                         drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1;
689                         drv = *(ide_driver_t **)bdev->bd_disk->private_data;
690                         if (drive->dsc_overlap && !drv->supports_dsc_overlap) {
691                                 drive->dsc_overlap = 0;
692                                 return -EPERM;
693                         }
694                         drive->nice1 = (arg >> IDE_NICE_1) & 1;
695                         return 0;
696                 case HDIO_DRIVE_RESET:
697                         if (!capable(CAP_SYS_ADMIN))
698                                 return -EACCES;
699
700                         /*
701                          *      Abort the current command on the
702                          *      group if there is one, taking
703                          *      care not to allow anything else
704                          *      to be queued and to die on the
705                          *      spot if we miss one somehow
706                          */
707
708                         spin_lock_irqsave(&ide_lock, flags);
709
710                         if (HWGROUP(drive)->resetting) {
711                                 spin_unlock_irqrestore(&ide_lock, flags);
712                                 return -EBUSY;
713                         }
714
715                         ide_abort(drive, "drive reset");
716
717                         BUG_ON(HWGROUP(drive)->handler);
718
719                         /* Ensure nothing gets queued after we
720                            drop the lock. Reset will clear the busy */
721
722                         HWGROUP(drive)->busy = 1;
723                         spin_unlock_irqrestore(&ide_lock, flags);
724                         (void) ide_do_reset(drive);
725
726                         return 0;
727                 case HDIO_GET_BUSSTATE:
728                         if (!capable(CAP_SYS_ADMIN))
729                                 return -EACCES;
730                         if (put_user(HWIF(drive)->bus_state, (long __user *)arg))
731                                 return -EFAULT;
732                         return 0;
733
734                 case HDIO_SET_BUSSTATE:
735                         if (!capable(CAP_SYS_ADMIN))
736                                 return -EACCES;
737                         return -EOPNOTSUPP;
738                 default:
739                         return -EINVAL;
740         }
741
742 read_val:
743         mutex_lock(&ide_setting_mtx);
744         spin_lock_irqsave(&ide_lock, flags);
745         err = *val;
746         spin_unlock_irqrestore(&ide_lock, flags);
747         mutex_unlock(&ide_setting_mtx);
748         return err >= 0 ? put_user(err, (long __user *)arg) : err;
749
750 set_val:
751         if (bdev != bdev->bd_contains)
752                 err = -EINVAL;
753         else {
754                 if (!capable(CAP_SYS_ADMIN))
755                         err = -EACCES;
756                 else {
757                         mutex_lock(&ide_setting_mtx);
758                         err = setfunc(drive, arg);
759                         mutex_unlock(&ide_setting_mtx);
760                 }
761         }
762         return err;
763 }
764
765 EXPORT_SYMBOL(generic_ide_ioctl);
766
767 /*
768  * stridx() returns the offset of c within s,
769  * or -1 if c is '\0' or not found within s.
770  */
771 static int __init stridx (const char *s, char c)
772 {
773         char *i = strchr(s, c);
774         return (i && c) ? i - s : -1;
775 }
776
777 /*
778  * match_parm() does parsing for ide_setup():
779  *
780  * 1. the first char of s must be '='.
781  * 2. if the remainder matches one of the supplied keywords,
782  *     the index (1 based) of the keyword is negated and returned.
783  * 3. if the remainder is a series of no more than max_vals numbers
784  *     separated by commas, the numbers are saved in vals[] and a
785  *     count of how many were saved is returned.  Base10 is assumed,
786  *     and base16 is allowed when prefixed with "0x".
787  * 4. otherwise, zero is returned.
788  */
789 static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals)
790 {
791         static const char *decimal = "0123456789";
792         static const char *hex = "0123456789abcdef";
793         int i, n;
794
795         if (*s++ == '=') {
796                 /*
797                  * Try matching against the supplied keywords,
798                  * and return -(index+1) if we match one
799                  */
800                 if (keywords != NULL) {
801                         for (i = 0; *keywords != NULL; ++i) {
802                                 if (!strcmp(s, *keywords++))
803                                         return -(i+1);
804                         }
805                 }
806                 /*
807                  * Look for a series of no more than "max_vals"
808                  * numeric values separated by commas, in base10,
809                  * or base16 when prefixed with "0x".
810                  * Return a count of how many were found.
811                  */
812                 for (n = 0; (i = stridx(decimal, *s)) >= 0;) {
813                         vals[n] = i;
814                         while ((i = stridx(decimal, *++s)) >= 0)
815                                 vals[n] = (vals[n] * 10) + i;
816                         if (*s == 'x' && !vals[n]) {
817                                 while ((i = stridx(hex, *++s)) >= 0)
818                                         vals[n] = (vals[n] * 0x10) + i;
819                         }
820                         if (++n == max_vals)
821                                 break;
822                         if (*s == ',' || *s == ';')
823                                 ++s;
824                 }
825                 if (!*s)
826                         return n;
827         }
828         return 0;       /* zero = nothing matched */
829 }
830
831 /*
832  * ide_setup() gets called VERY EARLY during initialization,
833  * to handle kernel "command line" strings beginning with "hdx=" or "ide".
834  *
835  * Remember to update Documentation/ide/ide.txt if you change something here.
836  */
837 static int __init ide_setup(char *s)
838 {
839         ide_hwif_t *hwif;
840         ide_drive_t *drive;
841         unsigned int hw, unit;
842         int vals[3];
843         const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1);
844
845         if (strncmp(s,"hd",2) == 0 && s[2] == '=')      /* hd= is for hd.c   */
846                 return 0;                               /* driver and not us */
847
848         if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2))
849                 return 0;
850
851         printk(KERN_INFO "ide_setup: %s", s);
852         init_ide_data ();
853
854 #ifdef CONFIG_BLK_DEV_IDEDOUBLER
855         if (!strcmp(s, "ide=doubler")) {
856                 extern int ide_doubler;
857
858                 printk(" : Enabled support for IDE doublers\n");
859                 ide_doubler = 1;
860                 goto obsolete_option;
861         }
862 #endif /* CONFIG_BLK_DEV_IDEDOUBLER */
863
864         if (!strcmp(s, "ide=nodma")) {
865                 printk(" : Prevented DMA\n");
866                 noautodma = 1;
867                 goto obsolete_option;
868         }
869
870 #ifdef CONFIG_BLK_DEV_IDEACPI
871         if (!strcmp(s, "ide=noacpi")) {
872                 //printk(" : Disable IDE ACPI support.\n");
873                 ide_noacpi = 1;
874                 goto obsolete_option;
875         }
876         if (!strcmp(s, "ide=acpigtf")) {
877                 //printk(" : Enable IDE ACPI _GTF support.\n");
878                 ide_acpigtf = 1;
879                 goto obsolete_option;
880         }
881         if (!strcmp(s, "ide=acpionboot")) {
882                 //printk(" : Call IDE ACPI methods on boot.\n");
883                 ide_acpionboot = 1;
884                 goto obsolete_option;
885         }
886 #endif /* CONFIG_BLK_DEV_IDEACPI */
887
888         /*
889          * Look for drive options:  "hdx="
890          */
891         if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) {
892                 const char *hd_words[] = {
893                         "none", "noprobe", "nowerr", "cdrom", "nodma",
894                         "-6", "-7", "-8", "-9", "-10",
895                         "noflush", "remap", "remap63", "scsi", NULL };
896                 unit = s[2] - 'a';
897                 hw   = unit / MAX_DRIVES;
898                 unit = unit % MAX_DRIVES;
899                 hwif = &ide_hwifs[hw];
900                 drive = &hwif->drives[unit];
901                 if (strncmp(s + 4, "ide-", 4) == 0) {
902                         strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req));
903                         goto obsolete_option;
904                 }
905                 switch (match_parm(&s[3], hd_words, vals, 3)) {
906                         case -1: /* "none" */
907                         case -2: /* "noprobe" */
908                                 drive->noprobe = 1;
909                                 goto obsolete_option;
910                         case -3: /* "nowerr" */
911                                 drive->bad_wstat = BAD_R_STAT;
912                                 goto obsolete_option;
913                         case -4: /* "cdrom" */
914                                 drive->present = 1;
915                                 drive->media = ide_cdrom;
916                                 /* an ATAPI device ignores DRDY */
917                                 drive->ready_stat = 0;
918                                 goto obsolete_option;
919                         case -5: /* nodma */
920                                 drive->nodma = 1;
921                                 goto obsolete_option;
922                         case -11: /* noflush */
923                                 drive->noflush = 1;
924                                 goto obsolete_option;
925                         case -12: /* "remap" */
926                                 drive->remap_0_to_1 = 1;
927                                 goto obsolete_option;
928                         case -13: /* "remap63" */
929                                 drive->sect0 = 63;
930                                 goto obsolete_option;
931                         case -14: /* "scsi" */
932                                 drive->scsi = 1;
933                                 goto obsolete_option;
934                         case 3: /* cyl,head,sect */
935                                 drive->media    = ide_disk;
936                                 drive->ready_stat = READY_STAT;
937                                 drive->cyl      = drive->bios_cyl  = vals[0];
938                                 drive->head     = drive->bios_head = vals[1];
939                                 drive->sect     = drive->bios_sect = vals[2];
940                                 drive->present  = 1;
941                                 drive->forced_geom = 1;
942                                 goto obsolete_option;
943                         default:
944                                 goto bad_option;
945                 }
946         }
947
948         if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e')
949                 goto bad_option;
950         /*
951          * Look for bus speed option:  "idebus="
952          */
953         if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') {
954                 if (match_parm(&s[6], NULL, vals, 1) != 1)
955                         goto bad_option;
956                 if (vals[0] >= 20 && vals[0] <= 66) {
957                         idebus_parameter = vals[0];
958                 } else
959                         printk(" -- BAD BUS SPEED! Expected value from 20 to 66");
960                 goto obsolete_option;
961         }
962
963 bad_option:
964         printk(" -- BAD OPTION\n");
965         return 1;
966 obsolete_option:
967         printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n");
968         return 1;
969 }
970
971 EXPORT_SYMBOL(ide_lock);
972
973 static int ide_bus_match(struct device *dev, struct device_driver *drv)
974 {
975         return 1;
976 }
977
978 static char *media_string(ide_drive_t *drive)
979 {
980         switch (drive->media) {
981         case ide_disk:
982                 return "disk";
983         case ide_cdrom:
984                 return "cdrom";
985         case ide_tape:
986                 return "tape";
987         case ide_floppy:
988                 return "floppy";
989         case ide_optical:
990                 return "optical";
991         default:
992                 return "UNKNOWN";
993         }
994 }
995
996 static ssize_t media_show(struct device *dev, struct device_attribute *attr, char *buf)
997 {
998         ide_drive_t *drive = to_ide_device(dev);
999         return sprintf(buf, "%s\n", media_string(drive));
1000 }
1001
1002 static ssize_t drivename_show(struct device *dev, struct device_attribute *attr, char *buf)
1003 {
1004         ide_drive_t *drive = to_ide_device(dev);
1005         return sprintf(buf, "%s\n", drive->name);
1006 }
1007
1008 static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
1009 {
1010         ide_drive_t *drive = to_ide_device(dev);
1011         return sprintf(buf, "ide:m-%s\n", media_string(drive));
1012 }
1013
1014 static ssize_t model_show(struct device *dev, struct device_attribute *attr,
1015                           char *buf)
1016 {
1017         ide_drive_t *drive = to_ide_device(dev);
1018         return sprintf(buf, "%s\n", drive->id->model);
1019 }
1020
1021 static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
1022                              char *buf)
1023 {
1024         ide_drive_t *drive = to_ide_device(dev);
1025         return sprintf(buf, "%s\n", drive->id->fw_rev);
1026 }
1027
1028 static ssize_t serial_show(struct device *dev, struct device_attribute *attr,
1029                            char *buf)
1030 {
1031         ide_drive_t *drive = to_ide_device(dev);
1032         return sprintf(buf, "%s\n", drive->id->serial_no);
1033 }
1034
1035 static struct device_attribute ide_dev_attrs[] = {
1036         __ATTR_RO(media),
1037         __ATTR_RO(drivename),
1038         __ATTR_RO(modalias),
1039         __ATTR_RO(model),
1040         __ATTR_RO(firmware),
1041         __ATTR(serial, 0400, serial_show, NULL),
1042         __ATTR_NULL
1043 };
1044
1045 static int ide_uevent(struct device *dev, struct kobj_uevent_env *env)
1046 {
1047         ide_drive_t *drive = to_ide_device(dev);
1048
1049         add_uevent_var(env, "MEDIA=%s", media_string(drive));
1050         add_uevent_var(env, "DRIVENAME=%s", drive->name);
1051         add_uevent_var(env, "MODALIAS=ide:m-%s", media_string(drive));
1052         return 0;
1053 }
1054
1055 static int generic_ide_probe(struct device *dev)
1056 {
1057         ide_drive_t *drive = to_ide_device(dev);
1058         ide_driver_t *drv = to_ide_driver(dev->driver);
1059
1060         return drv->probe ? drv->probe(drive) : -ENODEV;
1061 }
1062
1063 static int generic_ide_remove(struct device *dev)
1064 {
1065         ide_drive_t *drive = to_ide_device(dev);
1066         ide_driver_t *drv = to_ide_driver(dev->driver);
1067
1068         if (drv->remove)
1069                 drv->remove(drive);
1070
1071         return 0;
1072 }
1073
1074 static void generic_ide_shutdown(struct device *dev)
1075 {
1076         ide_drive_t *drive = to_ide_device(dev);
1077         ide_driver_t *drv = to_ide_driver(dev->driver);
1078
1079         if (dev->driver && drv->shutdown)
1080                 drv->shutdown(drive);
1081 }
1082
1083 struct bus_type ide_bus_type = {
1084         .name           = "ide",
1085         .match          = ide_bus_match,
1086         .uevent         = ide_uevent,
1087         .probe          = generic_ide_probe,
1088         .remove         = generic_ide_remove,
1089         .shutdown       = generic_ide_shutdown,
1090         .dev_attrs      = ide_dev_attrs,
1091         .suspend        = generic_ide_suspend,
1092         .resume         = generic_ide_resume,
1093 };
1094
1095 EXPORT_SYMBOL_GPL(ide_bus_type);
1096
1097 int ide_vlb_clk;
1098 EXPORT_SYMBOL_GPL(ide_vlb_clk);
1099
1100 module_param_named(vlb_clock, ide_vlb_clk, int, 0);
1101 MODULE_PARM_DESC(vlb_clock, "VLB clock frequency (in MHz)");
1102
1103 int ide_pci_clk;
1104 EXPORT_SYMBOL_GPL(ide_pci_clk);
1105
1106 module_param_named(pci_clock, ide_pci_clk, int, 0);
1107 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
1108
1109 static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
1110 {
1111         int a, b, i, j = 1;
1112         unsigned int *dev_param_mask = (unsigned int *)kp->arg;
1113
1114         if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
1115             sscanf(s, "%d.%d", &a, &b) != 2)
1116                 return -EINVAL;
1117
1118         i = a * MAX_DRIVES + b;
1119
1120         if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1121                 return -EINVAL;
1122
1123         if (j)
1124                 *dev_param_mask |= (1 << i);
1125         else
1126                 *dev_param_mask &= (1 << i);
1127
1128         return 0;
1129 }
1130
1131 static unsigned int ide_nodma;
1132
1133 module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
1134 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
1135
1136 static unsigned int ide_noflush;
1137
1138 module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
1139 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
1140
1141 static unsigned int ide_noprobe;
1142
1143 module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
1144 MODULE_PARM_DESC(noprobe, "skip probing for a device");
1145
1146 static unsigned int ide_nowerr;
1147
1148 module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
1149 MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
1150
1151 static unsigned int ide_cdroms;
1152
1153 module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
1154 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
1155
1156 struct chs_geom {
1157         unsigned int    cyl;
1158         u8              head;
1159         u8              sect;
1160 };
1161
1162 static unsigned int ide_disks;
1163 static struct chs_geom ide_disks_chs[MAX_HWIFS * MAX_DRIVES];
1164
1165 static int ide_set_disk_chs(const char *str, struct kernel_param *kp)
1166 {
1167         int a, b, c = 0, h = 0, s = 0, i, j = 1;
1168
1169         if (sscanf(str, "%d.%d:%d,%d,%d", &a, &b, &c, &h, &s) != 5 &&
1170             sscanf(str, "%d.%d:%d", &a, &b, &j) != 3)
1171                 return -EINVAL;
1172
1173         i = a * MAX_DRIVES + b;
1174
1175         if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
1176                 return -EINVAL;
1177
1178         if (c > INT_MAX || h > 255 || s > 255)
1179                 return -EINVAL;
1180
1181         if (j)
1182                 ide_disks |= (1 << i);
1183         else
1184                 ide_disks &= (1 << i);
1185
1186         ide_disks_chs[i].cyl  = c;
1187         ide_disks_chs[i].head = h;
1188         ide_disks_chs[i].sect = s;
1189
1190         return 0;
1191 }
1192
1193 module_param_call(chs, ide_set_disk_chs, NULL, NULL, 0);
1194 MODULE_PARM_DESC(chs, "force device as a disk (using CHS)");
1195
1196 static void ide_dev_apply_params(ide_drive_t *drive)
1197 {
1198         int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
1199
1200         if (ide_nodma & (1 << i)) {
1201                 printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
1202                 drive->nodma = 1;
1203         }
1204         if (ide_noflush & (1 << i)) {
1205                 printk(KERN_INFO "ide: disabling flush requests for %s\n",
1206                                  drive->name);
1207                 drive->noflush = 1;
1208         }
1209         if (ide_noprobe & (1 << i)) {
1210                 printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
1211                 drive->noprobe = 1;
1212         }
1213         if (ide_nowerr & (1 << i)) {
1214                 printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
1215                                  drive->name);
1216                 drive->bad_wstat = BAD_R_STAT;
1217         }
1218         if (ide_cdroms & (1 << i)) {
1219                 printk(KERN_INFO "ide: forcing %s as a CD-ROM\n", drive->name);
1220                 drive->present = 1;
1221                 drive->media = ide_cdrom;
1222                 /* an ATAPI device ignores DRDY */
1223                 drive->ready_stat = 0;
1224         }
1225         if (ide_disks & (1 << i)) {
1226                 drive->cyl  = drive->bios_cyl  = ide_disks_chs[i].cyl;
1227                 drive->head = drive->bios_head = ide_disks_chs[i].head;
1228                 drive->sect = drive->bios_sect = ide_disks_chs[i].sect;
1229                 drive->forced_geom = 1;
1230                 printk(KERN_INFO "ide: forcing %s as a disk (%d/%d/%d)\n",
1231                                  drive->name,
1232                                  drive->cyl, drive->head, drive->sect);
1233                 drive->present = 1;
1234                 drive->media = ide_disk;
1235                 drive->ready_stat = READY_STAT;
1236         }
1237 }
1238
1239 static unsigned int ide_ignore_cable;
1240
1241 static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
1242 {
1243         int i, j = 1;
1244
1245         if (sscanf(s, "%d:%d", &i, &j) != 2 && sscanf(s, "%d", &i) != 1)
1246                 return -EINVAL;
1247
1248         if (i >= MAX_HWIFS || j < 0 || j > 1)
1249                 return -EINVAL;
1250
1251         if (j)
1252                 ide_ignore_cable |= (1 << i);
1253         else
1254                 ide_ignore_cable &= (1 << i);
1255
1256         return 0;
1257 }
1258
1259 module_param_call(ignore_cable, ide_set_ignore_cable, NULL, NULL, 0);
1260 MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
1261
1262 void ide_port_apply_params(ide_hwif_t *hwif)
1263 {
1264         int i;
1265
1266         if (ide_ignore_cable & (1 << hwif->index)) {
1267                 printk(KERN_INFO "ide: ignoring cable detection for %s\n",
1268                                  hwif->name);
1269                 hwif->cbl = ATA_CBL_PATA40_SHORT;
1270         }
1271
1272         for (i = 0; i < MAX_DRIVES; i++)
1273                 ide_dev_apply_params(&hwif->drives[i]);
1274 }
1275
1276 /*
1277  * This is gets invoked once during initialization, to set *everything* up
1278  */
1279 static int __init ide_init(void)
1280 {
1281         int ret;
1282
1283         printk(KERN_INFO "Uniform Multi-Platform E-IDE driver\n");
1284         system_bus_speed = ide_system_bus_speed();
1285
1286         printk(KERN_INFO "ide: Assuming %dMHz system bus speed "
1287                          "for PIO modes%s\n", system_bus_speed,
1288                         idebus_parameter ? "" : "; override with idebus=xx");
1289
1290         ret = bus_register(&ide_bus_type);
1291         if (ret < 0) {
1292                 printk(KERN_WARNING "IDE: bus_register error: %d\n", ret);
1293                 return ret;
1294         }
1295
1296         ide_port_class = class_create(THIS_MODULE, "ide_port");
1297         if (IS_ERR(ide_port_class)) {
1298                 ret = PTR_ERR(ide_port_class);
1299                 goto out_port_class;
1300         }
1301
1302         init_ide_data();
1303
1304         proc_ide_create();
1305
1306         return 0;
1307
1308 out_port_class:
1309         bus_unregister(&ide_bus_type);
1310
1311         return ret;
1312 }
1313
1314 #ifdef MODULE
1315 static char *options = NULL;
1316 module_param(options, charp, 0);
1317 MODULE_LICENSE("GPL");
1318
1319 static void __init parse_options (char *line)
1320 {
1321         char *next = line;
1322
1323         if (line == NULL || !*line)
1324                 return;
1325         while ((line = next) != NULL) {
1326                 if ((next = strchr(line,' ')) != NULL)
1327                         *next++ = 0;
1328                 if (!ide_setup(line))
1329                         printk (KERN_INFO "Unknown option '%s'\n", line);
1330         }
1331 }
1332
1333 int __init init_module (void)
1334 {
1335         parse_options(options);
1336         return ide_init();
1337 }
1338
1339 void __exit cleanup_module (void)
1340 {
1341         proc_ide_destroy();
1342
1343         class_destroy(ide_port_class);
1344
1345         bus_unregister(&ide_bus_type);
1346 }
1347
1348 #else /* !MODULE */
1349
1350 __setup("", ide_setup);
1351
1352 module_init(ide_init);
1353
1354 #endif /* MODULE */