d3e33ff59f
On Monday 28 July 2008, Benjamin Herrenschmidt wrote:
[...]
> Vector: 300 (Data Access) at [c58b7b80]
> pc: c014f264: elv_may_queue+0x10/0x44
> lr: c0152750: get_request+0x2c/0x2c0
> sp: c58b7c30
> msr: 1032
> dar: c
> dsisr: 40000000
> current = 0xc58aaae0
> pid = 854, comm = media-bay
> enter ? for help
> mon> t
> [c58b7c40] c0152750 get_request+0x2c/0x2c0
> [c58b7c70] c0152a08 get_request_wait+0x24/0xec
> [c58b7cc0] c0225674 ide_cd_queue_pc+0x58/0x1a0
> [c58b7d40] c022672c ide_cdrom_packet+0x9c/0xdc
> [c58b7d70] c0261810 cdrom_get_disc_info+0x60/0xd0
> [c58b7dc0] c026208c cdrom_mrw_exit+0x1c/0x11c
> [c58b7e30] c0260f7c unregister_cdrom+0x84/0xe8
> [c58b7e50] c022395c ide_cd_release+0x80/0x84
> [c58b7e70] c0163650 kref_put+0x54/0x6c
> [c58b7e80] c0223884 ide_cd_put+0x40/0x5c
> [c58b7ea0] c0211100 generic_ide_remove+0x28/0x3c
> [c58b7eb0] c01e9d34 __device_release_driver+0x78/0xb4
> [c58b7ec0] c01e9e44 device_release_driver+0x28/0x44
> [c58b7ee0] c01e8f7c bus_remove_device+0xac/0xd8
> [c58b7f00] c01e7424 device_del+0x104/0x198
> [c58b7f20] c01e74d0 device_unregister+0x18/0x30
> [c58b7f40] c02121c4 __ide_port_unregister_devices+0x6c/0x88
> [c58b7f60] c0212398 ide_port_unregister_devices+0x38/0x80
> [c58b7f80] c0208ca4 media_bay_step+0x1cc/0x5c0
> [c58b7fb0] c0209124 media_bay_task+0x8c/0xcc
> [c58b7fd0] c00485c0 kthread+0x48/0x84
> [c58b7ff0] c0011b20 kernel_thread+0x44/0x60
The guilty commit turned out to be 08da591e14
("ide: add ide_device_{get,put}() helpers"). ide_device_put() is called
before kref_put() in ide_cd_put() so IDE device is already gone by the time
ide_cd_release() is reached.
Fix it by calling ide_device_get() before kref_get() and ide_device_put()
after kref_put() in all affected device drivers.
v2:
Brown paper bag time. In v1 cd->drive was referenced after dropping last
reference on cd object (which could result in OOPS in ide_device_put() as
reported/debugged by Mariusz Kozlowski). Fix it by caching cd->drive in
the local variable (fix other device drivers too).
Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reported-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Borislav Petkov <petkovbb@gmail.com>
Tested-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Tested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
1222 lines
31 KiB
C
1222 lines
31 KiB
C
/*
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* Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
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* Copyright (C) 1998-2002 Linux ATA Development
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* Andre Hedrick <andre@linux-ide.org>
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* Copyright (C) 2003 Red Hat <alan@redhat.com>
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* Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz
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*/
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/*
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* Mostly written by Mark Lord <mlord@pobox.com>
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* and Gadi Oxman <gadio@netvision.net.il>
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* and Andre Hedrick <andre@linux-ide.org>
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*
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* This is the IDE/ATA disk driver, as evolved from hd.c and ide.c.
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*/
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#define IDEDISK_VERSION "1.18"
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/genhd.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/leds.h>
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#define _IDE_DISK
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#include <linux/ide.h>
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#include <asm/byteorder.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/div64.h>
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struct ide_disk_obj {
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ide_drive_t *drive;
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ide_driver_t *driver;
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struct gendisk *disk;
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struct kref kref;
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unsigned int openers; /* protected by BKL for now */
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};
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static DEFINE_MUTEX(idedisk_ref_mutex);
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#define to_ide_disk(obj) container_of(obj, struct ide_disk_obj, kref)
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#define ide_disk_g(disk) \
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container_of((disk)->private_data, struct ide_disk_obj, driver)
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static void ide_disk_release(struct kref *);
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static struct ide_disk_obj *ide_disk_get(struct gendisk *disk)
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{
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struct ide_disk_obj *idkp = NULL;
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mutex_lock(&idedisk_ref_mutex);
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idkp = ide_disk_g(disk);
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if (idkp) {
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if (ide_device_get(idkp->drive))
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idkp = NULL;
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else
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kref_get(&idkp->kref);
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}
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mutex_unlock(&idedisk_ref_mutex);
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return idkp;
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}
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static void ide_disk_put(struct ide_disk_obj *idkp)
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{
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ide_drive_t *drive = idkp->drive;
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mutex_lock(&idedisk_ref_mutex);
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kref_put(&idkp->kref, ide_disk_release);
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ide_device_put(drive);
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mutex_unlock(&idedisk_ref_mutex);
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}
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/*
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* lba_capacity_is_ok() performs a sanity check on the claimed "lba_capacity"
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* value for this drive (from its reported identification information).
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*
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* Returns: 1 if lba_capacity looks sensible
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* 0 otherwise
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*
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* It is called only once for each drive.
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*/
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static int lba_capacity_is_ok(struct hd_driveid *id)
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{
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unsigned long lba_sects, chs_sects, head, tail;
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/* No non-LBA info .. so valid! */
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if (id->cyls == 0)
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return 1;
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/*
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* The ATA spec tells large drives to return
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* C/H/S = 16383/16/63 independent of their size.
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* Some drives can be jumpered to use 15 heads instead of 16.
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* Some drives can be jumpered to use 4092 cyls instead of 16383.
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*/
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if ((id->cyls == 16383
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|| (id->cyls == 4092 && id->cur_cyls == 16383)) &&
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id->sectors == 63 &&
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(id->heads == 15 || id->heads == 16) &&
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(id->lba_capacity >= 16383*63*id->heads))
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return 1;
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lba_sects = id->lba_capacity;
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chs_sects = id->cyls * id->heads * id->sectors;
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/* perform a rough sanity check on lba_sects: within 10% is OK */
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if ((lba_sects - chs_sects) < chs_sects/10)
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return 1;
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/* some drives have the word order reversed */
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head = ((lba_sects >> 16) & 0xffff);
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tail = (lba_sects & 0xffff);
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lba_sects = (head | (tail << 16));
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if ((lba_sects - chs_sects) < chs_sects/10) {
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id->lba_capacity = lba_sects;
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return 1; /* lba_capacity is (now) good */
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}
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return 0; /* lba_capacity value may be bad */
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}
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static const u8 ide_rw_cmds[] = {
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WIN_MULTREAD,
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WIN_MULTWRITE,
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WIN_MULTREAD_EXT,
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WIN_MULTWRITE_EXT,
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WIN_READ,
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WIN_WRITE,
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WIN_READ_EXT,
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WIN_WRITE_EXT,
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WIN_READDMA,
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WIN_WRITEDMA,
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WIN_READDMA_EXT,
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WIN_WRITEDMA_EXT,
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};
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static const u8 ide_data_phases[] = {
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TASKFILE_MULTI_IN,
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TASKFILE_MULTI_OUT,
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TASKFILE_IN,
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TASKFILE_OUT,
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TASKFILE_IN_DMA,
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TASKFILE_OUT_DMA,
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};
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static void ide_tf_set_cmd(ide_drive_t *drive, ide_task_t *task, u8 dma)
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{
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u8 index, lba48, write;
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lba48 = (task->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0;
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write = (task->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0;
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if (dma)
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index = 8;
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else
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index = drive->mult_count ? 0 : 4;
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task->tf.command = ide_rw_cmds[index + lba48 + write];
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if (dma)
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index = 8; /* fixup index */
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task->data_phase = ide_data_phases[index / 2 + write];
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}
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/*
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* __ide_do_rw_disk() issues READ and WRITE commands to a disk,
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* using LBA if supported, or CHS otherwise, to address sectors.
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*/
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static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
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sector_t block)
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{
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ide_hwif_t *hwif = HWIF(drive);
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unsigned int dma = drive->using_dma;
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u16 nsectors = (u16)rq->nr_sectors;
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u8 lba48 = (drive->addressing == 1) ? 1 : 0;
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ide_task_t task;
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struct ide_taskfile *tf = &task.tf;
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ide_startstop_t rc;
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if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) {
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if (block + rq->nr_sectors > 1ULL << 28)
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dma = 0;
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else
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lba48 = 0;
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}
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if (!dma) {
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ide_init_sg_cmd(drive, rq);
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ide_map_sg(drive, rq);
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}
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memset(&task, 0, sizeof(task));
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task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
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if (drive->select.b.lba) {
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if (lba48) {
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pr_debug("%s: LBA=0x%012llx\n", drive->name,
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(unsigned long long)block);
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tf->hob_nsect = (nsectors >> 8) & 0xff;
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tf->hob_lbal = (u8)(block >> 24);
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if (sizeof(block) != 4) {
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tf->hob_lbam = (u8)((u64)block >> 32);
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tf->hob_lbah = (u8)((u64)block >> 40);
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}
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tf->nsect = nsectors & 0xff;
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tf->lbal = (u8) block;
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tf->lbam = (u8)(block >> 8);
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tf->lbah = (u8)(block >> 16);
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task.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
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} else {
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tf->nsect = nsectors & 0xff;
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tf->lbal = block;
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tf->lbam = block >>= 8;
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tf->lbah = block >>= 8;
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tf->device = (block >> 8) & 0xf;
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}
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} else {
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unsigned int sect, head, cyl, track;
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track = (int)block / drive->sect;
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sect = (int)block % drive->sect + 1;
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head = track % drive->head;
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cyl = track / drive->head;
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pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect);
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tf->nsect = nsectors & 0xff;
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tf->lbal = sect;
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tf->lbam = cyl;
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tf->lbah = cyl >> 8;
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tf->device = head;
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}
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if (rq_data_dir(rq))
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task.tf_flags |= IDE_TFLAG_WRITE;
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ide_tf_set_cmd(drive, &task, dma);
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if (!dma)
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hwif->data_phase = task.data_phase;
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task.rq = rq;
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rc = do_rw_taskfile(drive, &task);
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if (rc == ide_stopped && dma) {
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/* fallback to PIO */
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task.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK;
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ide_tf_set_cmd(drive, &task, 0);
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hwif->data_phase = task.data_phase;
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ide_init_sg_cmd(drive, rq);
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rc = do_rw_taskfile(drive, &task);
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}
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return rc;
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}
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/*
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* 268435455 == 137439 MB or 28bit limit
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* 320173056 == 163929 MB or 48bit addressing
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* 1073741822 == 549756 MB or 48bit addressing fake drive
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*/
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static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq,
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sector_t block)
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{
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ide_hwif_t *hwif = HWIF(drive);
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BUG_ON(drive->blocked);
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if (!blk_fs_request(rq)) {
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blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command");
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ide_end_request(drive, 0, 0);
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return ide_stopped;
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}
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ledtrig_ide_activity();
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pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n",
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drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
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(unsigned long long)block, rq->nr_sectors,
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(unsigned long)rq->buffer);
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if (hwif->rw_disk)
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hwif->rw_disk(drive, rq);
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return __ide_do_rw_disk(drive, rq, block);
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}
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/*
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* Queries for true maximum capacity of the drive.
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* Returns maximum LBA address (> 0) of the drive, 0 if failed.
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*/
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static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
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{
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ide_task_t args;
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struct ide_taskfile *tf = &args.tf;
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u64 addr = 0;
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/* Create IDE/ATA command request structure */
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memset(&args, 0, sizeof(ide_task_t));
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if (lba48)
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tf->command = WIN_READ_NATIVE_MAX_EXT;
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else
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tf->command = WIN_READ_NATIVE_MAX;
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tf->device = ATA_LBA;
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args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
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if (lba48)
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args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
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/* submit command request */
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ide_no_data_taskfile(drive, &args);
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/* if OK, compute maximum address value */
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if ((tf->status & 0x01) == 0)
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addr = ide_get_lba_addr(tf, lba48) + 1;
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return addr;
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}
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/*
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* Sets maximum virtual LBA address of the drive.
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* Returns new maximum virtual LBA address (> 0) or 0 on failure.
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*/
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static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
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{
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ide_task_t args;
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struct ide_taskfile *tf = &args.tf;
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u64 addr_set = 0;
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addr_req--;
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/* Create IDE/ATA command request structure */
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memset(&args, 0, sizeof(ide_task_t));
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tf->lbal = (addr_req >> 0) & 0xff;
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tf->lbam = (addr_req >>= 8) & 0xff;
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tf->lbah = (addr_req >>= 8) & 0xff;
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if (lba48) {
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tf->hob_lbal = (addr_req >>= 8) & 0xff;
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tf->hob_lbam = (addr_req >>= 8) & 0xff;
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tf->hob_lbah = (addr_req >>= 8) & 0xff;
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tf->command = WIN_SET_MAX_EXT;
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} else {
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tf->device = (addr_req >>= 8) & 0x0f;
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tf->command = WIN_SET_MAX;
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}
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tf->device |= ATA_LBA;
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args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
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if (lba48)
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args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB);
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/* submit command request */
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ide_no_data_taskfile(drive, &args);
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/* if OK, compute maximum address value */
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if ((tf->status & 0x01) == 0)
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addr_set = ide_get_lba_addr(tf, lba48) + 1;
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return addr_set;
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}
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static unsigned long long sectors_to_MB(unsigned long long n)
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{
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n <<= 9; /* make it bytes */
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do_div(n, 1000000); /* make it MB */
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return n;
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}
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/*
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* Bits 10 of command_set_1 and cfs_enable_1 must be equal,
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* so on non-buggy drives we need test only one.
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* However, we should also check whether these fields are valid.
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*/
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static inline int idedisk_supports_hpa(const struct hd_driveid *id)
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{
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return (id->command_set_1 & 0x0400) && (id->cfs_enable_1 & 0x0400);
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}
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/*
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* The same here.
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*/
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static inline int idedisk_supports_lba48(const struct hd_driveid *id)
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{
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return (id->command_set_2 & 0x0400) && (id->cfs_enable_2 & 0x0400)
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&& id->lba_capacity_2;
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}
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/*
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* Some disks report total number of sectors instead of
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* maximum sector address. We list them here.
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*/
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static const struct drive_list_entry hpa_list[] = {
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{ "ST340823A", NULL },
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{ "ST320413A", NULL },
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{ "ST310211A", NULL },
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{ NULL, NULL }
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};
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static void idedisk_check_hpa(ide_drive_t *drive)
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{
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unsigned long long capacity, set_max;
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int lba48 = idedisk_supports_lba48(drive->id);
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capacity = drive->capacity64;
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set_max = idedisk_read_native_max_address(drive, lba48);
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if (ide_in_drive_list(drive->id, hpa_list)) {
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/*
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* Since we are inclusive wrt to firmware revisions do this
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* extra check and apply the workaround only when needed.
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*/
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if (set_max == capacity + 1)
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set_max--;
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}
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if (set_max <= capacity)
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return;
|
|
|
|
printk(KERN_INFO "%s: Host Protected Area detected.\n"
|
|
"\tcurrent capacity is %llu sectors (%llu MB)\n"
|
|
"\tnative capacity is %llu sectors (%llu MB)\n",
|
|
drive->name,
|
|
capacity, sectors_to_MB(capacity),
|
|
set_max, sectors_to_MB(set_max));
|
|
|
|
set_max = idedisk_set_max_address(drive, set_max, lba48);
|
|
|
|
if (set_max) {
|
|
drive->capacity64 = set_max;
|
|
printk(KERN_INFO "%s: Host Protected Area disabled.\n",
|
|
drive->name);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Compute drive->capacity, the full capacity of the drive
|
|
* Called with drive->id != NULL.
|
|
*
|
|
* To compute capacity, this uses either of
|
|
*
|
|
* 1. CHS value set by user (whatever user sets will be trusted)
|
|
* 2. LBA value from target drive (require new ATA feature)
|
|
* 3. LBA value from system BIOS (new one is OK, old one may break)
|
|
* 4. CHS value from system BIOS (traditional style)
|
|
*
|
|
* in above order (i.e., if value of higher priority is available,
|
|
* reset will be ignored).
|
|
*/
|
|
static void init_idedisk_capacity(ide_drive_t *drive)
|
|
{
|
|
struct hd_driveid *id = drive->id;
|
|
/*
|
|
* If this drive supports the Host Protected Area feature set,
|
|
* then we may need to change our opinion about the drive's capacity.
|
|
*/
|
|
int hpa = idedisk_supports_hpa(id);
|
|
|
|
if (idedisk_supports_lba48(id)) {
|
|
/* drive speaks 48-bit LBA */
|
|
drive->select.b.lba = 1;
|
|
drive->capacity64 = id->lba_capacity_2;
|
|
if (hpa)
|
|
idedisk_check_hpa(drive);
|
|
} else if ((id->capability & 2) && lba_capacity_is_ok(id)) {
|
|
/* drive speaks 28-bit LBA */
|
|
drive->select.b.lba = 1;
|
|
drive->capacity64 = id->lba_capacity;
|
|
if (hpa)
|
|
idedisk_check_hpa(drive);
|
|
} else {
|
|
/* drive speaks boring old 28-bit CHS */
|
|
drive->capacity64 = drive->cyl * drive->head * drive->sect;
|
|
}
|
|
}
|
|
|
|
static sector_t idedisk_capacity(ide_drive_t *drive)
|
|
{
|
|
return drive->capacity64 - drive->sect0;
|
|
}
|
|
|
|
#ifdef CONFIG_IDE_PROC_FS
|
|
static int smart_enable(ide_drive_t *drive)
|
|
{
|
|
ide_task_t args;
|
|
struct ide_taskfile *tf = &args.tf;
|
|
|
|
memset(&args, 0, sizeof(ide_task_t));
|
|
tf->feature = SMART_ENABLE;
|
|
tf->lbam = SMART_LCYL_PASS;
|
|
tf->lbah = SMART_HCYL_PASS;
|
|
tf->command = WIN_SMART;
|
|
args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
|
|
return ide_no_data_taskfile(drive, &args);
|
|
}
|
|
|
|
static int get_smart_data(ide_drive_t *drive, u8 *buf, u8 sub_cmd)
|
|
{
|
|
ide_task_t args;
|
|
struct ide_taskfile *tf = &args.tf;
|
|
|
|
memset(&args, 0, sizeof(ide_task_t));
|
|
tf->feature = sub_cmd;
|
|
tf->nsect = 0x01;
|
|
tf->lbam = SMART_LCYL_PASS;
|
|
tf->lbah = SMART_HCYL_PASS;
|
|
tf->command = WIN_SMART;
|
|
args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
|
|
args.data_phase = TASKFILE_IN;
|
|
(void) smart_enable(drive);
|
|
return ide_raw_taskfile(drive, &args, buf, 1);
|
|
}
|
|
|
|
static int proc_idedisk_read_cache
|
|
(char *page, char **start, off_t off, int count, int *eof, void *data)
|
|
{
|
|
ide_drive_t *drive = (ide_drive_t *) data;
|
|
char *out = page;
|
|
int len;
|
|
|
|
if (drive->id_read)
|
|
len = sprintf(out, "%i\n", drive->id->buf_size / 2);
|
|
else
|
|
len = sprintf(out, "(none)\n");
|
|
|
|
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
|
|
}
|
|
|
|
static int proc_idedisk_read_capacity
|
|
(char *page, char **start, off_t off, int count, int *eof, void *data)
|
|
{
|
|
ide_drive_t*drive = (ide_drive_t *)data;
|
|
int len;
|
|
|
|
len = sprintf(page, "%llu\n", (long long)idedisk_capacity(drive));
|
|
|
|
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
|
|
}
|
|
|
|
static int proc_idedisk_read_smart(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data, u8 sub_cmd)
|
|
{
|
|
ide_drive_t *drive = (ide_drive_t *)data;
|
|
int len = 0, i = 0;
|
|
|
|
if (get_smart_data(drive, page, sub_cmd) == 0) {
|
|
unsigned short *val = (unsigned short *) page;
|
|
char *out = ((char *)val) + (SECTOR_WORDS * 4);
|
|
page = out;
|
|
do {
|
|
out += sprintf(out, "%04x%c", le16_to_cpu(*val),
|
|
(++i & 7) ? ' ' : '\n');
|
|
val += 1;
|
|
} while (i < (SECTOR_WORDS * 2));
|
|
len = out - page;
|
|
}
|
|
|
|
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
|
|
}
|
|
|
|
static int proc_idedisk_read_sv
|
|
(char *page, char **start, off_t off, int count, int *eof, void *data)
|
|
{
|
|
return proc_idedisk_read_smart(page, start, off, count, eof, data,
|
|
SMART_READ_VALUES);
|
|
}
|
|
|
|
static int proc_idedisk_read_st
|
|
(char *page, char **start, off_t off, int count, int *eof, void *data)
|
|
{
|
|
return proc_idedisk_read_smart(page, start, off, count, eof, data,
|
|
SMART_READ_THRESHOLDS);
|
|
}
|
|
|
|
static ide_proc_entry_t idedisk_proc[] = {
|
|
{ "cache", S_IFREG|S_IRUGO, proc_idedisk_read_cache, NULL },
|
|
{ "capacity", S_IFREG|S_IRUGO, proc_idedisk_read_capacity, NULL },
|
|
{ "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
|
|
{ "smart_values", S_IFREG|S_IRUSR, proc_idedisk_read_sv, NULL },
|
|
{ "smart_thresholds", S_IFREG|S_IRUSR, proc_idedisk_read_st, NULL },
|
|
{ NULL, 0, NULL, NULL }
|
|
};
|
|
#endif /* CONFIG_IDE_PROC_FS */
|
|
|
|
static void idedisk_prepare_flush(struct request_queue *q, struct request *rq)
|
|
{
|
|
ide_drive_t *drive = q->queuedata;
|
|
ide_task_t *task = kmalloc(sizeof(*task), GFP_ATOMIC);
|
|
|
|
/* FIXME: map struct ide_taskfile on rq->cmd[] */
|
|
BUG_ON(task == NULL);
|
|
|
|
memset(task, 0, sizeof(*task));
|
|
if (ide_id_has_flush_cache_ext(drive->id) &&
|
|
(drive->capacity64 >= (1UL << 28)))
|
|
task->tf.command = WIN_FLUSH_CACHE_EXT;
|
|
else
|
|
task->tf.command = WIN_FLUSH_CACHE;
|
|
task->tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE |
|
|
IDE_TFLAG_DYN;
|
|
task->data_phase = TASKFILE_NO_DATA;
|
|
|
|
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
|
|
rq->cmd_flags |= REQ_SOFTBARRIER;
|
|
rq->special = task;
|
|
}
|
|
|
|
/*
|
|
* This is tightly woven into the driver->do_special can not touch.
|
|
* DON'T do it again until a total personality rewrite is committed.
|
|
*/
|
|
static int set_multcount(ide_drive_t *drive, int arg)
|
|
{
|
|
struct request *rq;
|
|
int error;
|
|
|
|
if (arg < 0 || arg > drive->id->max_multsect)
|
|
return -EINVAL;
|
|
|
|
if (drive->special.b.set_multmode)
|
|
return -EBUSY;
|
|
|
|
rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
|
|
rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
|
|
|
|
drive->mult_req = arg;
|
|
drive->special.b.set_multmode = 1;
|
|
error = blk_execute_rq(drive->queue, NULL, rq, 0);
|
|
blk_put_request(rq);
|
|
|
|
return (drive->mult_count == arg) ? 0 : -EIO;
|
|
}
|
|
|
|
static int set_nowerr(ide_drive_t *drive, int arg)
|
|
{
|
|
if (arg < 0 || arg > 1)
|
|
return -EINVAL;
|
|
|
|
if (ide_spin_wait_hwgroup(drive))
|
|
return -EBUSY;
|
|
drive->nowerr = arg;
|
|
drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT;
|
|
spin_unlock_irq(&ide_lock);
|
|
return 0;
|
|
}
|
|
|
|
static void update_ordered(ide_drive_t *drive)
|
|
{
|
|
struct hd_driveid *id = drive->id;
|
|
unsigned ordered = QUEUE_ORDERED_NONE;
|
|
prepare_flush_fn *prep_fn = NULL;
|
|
|
|
if (drive->wcache) {
|
|
unsigned long long capacity;
|
|
int barrier;
|
|
/*
|
|
* We must avoid issuing commands a drive does not
|
|
* understand or we may crash it. We check flush cache
|
|
* is supported. We also check we have the LBA48 flush
|
|
* cache if the drive capacity is too large. By this
|
|
* time we have trimmed the drive capacity if LBA48 is
|
|
* not available so we don't need to recheck that.
|
|
*/
|
|
capacity = idedisk_capacity(drive);
|
|
barrier = ide_id_has_flush_cache(id) && !drive->noflush &&
|
|
(drive->addressing == 0 || capacity <= (1ULL << 28) ||
|
|
ide_id_has_flush_cache_ext(id));
|
|
|
|
printk(KERN_INFO "%s: cache flushes %ssupported\n",
|
|
drive->name, barrier ? "" : "not ");
|
|
|
|
if (barrier) {
|
|
ordered = QUEUE_ORDERED_DRAIN_FLUSH;
|
|
prep_fn = idedisk_prepare_flush;
|
|
}
|
|
} else
|
|
ordered = QUEUE_ORDERED_DRAIN;
|
|
|
|
blk_queue_ordered(drive->queue, ordered, prep_fn);
|
|
}
|
|
|
|
static int write_cache(ide_drive_t *drive, int arg)
|
|
{
|
|
ide_task_t args;
|
|
int err = 1;
|
|
|
|
if (arg < 0 || arg > 1)
|
|
return -EINVAL;
|
|
|
|
if (ide_id_has_flush_cache(drive->id)) {
|
|
memset(&args, 0, sizeof(ide_task_t));
|
|
args.tf.feature = arg ?
|
|
SETFEATURES_EN_WCACHE : SETFEATURES_DIS_WCACHE;
|
|
args.tf.command = WIN_SETFEATURES;
|
|
args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
|
|
err = ide_no_data_taskfile(drive, &args);
|
|
if (err == 0)
|
|
drive->wcache = arg;
|
|
}
|
|
|
|
update_ordered(drive);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int do_idedisk_flushcache(ide_drive_t *drive)
|
|
{
|
|
ide_task_t args;
|
|
|
|
memset(&args, 0, sizeof(ide_task_t));
|
|
if (ide_id_has_flush_cache_ext(drive->id))
|
|
args.tf.command = WIN_FLUSH_CACHE_EXT;
|
|
else
|
|
args.tf.command = WIN_FLUSH_CACHE;
|
|
args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
|
|
return ide_no_data_taskfile(drive, &args);
|
|
}
|
|
|
|
static int set_acoustic(ide_drive_t *drive, int arg)
|
|
{
|
|
ide_task_t args;
|
|
|
|
if (arg < 0 || arg > 254)
|
|
return -EINVAL;
|
|
|
|
memset(&args, 0, sizeof(ide_task_t));
|
|
args.tf.feature = arg ? SETFEATURES_EN_AAM : SETFEATURES_DIS_AAM;
|
|
args.tf.nsect = arg;
|
|
args.tf.command = WIN_SETFEATURES;
|
|
args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
|
|
ide_no_data_taskfile(drive, &args);
|
|
drive->acoustic = arg;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* drive->addressing:
|
|
* 0: 28-bit
|
|
* 1: 48-bit
|
|
* 2: 48-bit capable doing 28-bit
|
|
*/
|
|
static int set_lba_addressing(ide_drive_t *drive, int arg)
|
|
{
|
|
if (arg < 0 || arg > 2)
|
|
return -EINVAL;
|
|
|
|
drive->addressing = 0;
|
|
|
|
if (drive->hwif->host_flags & IDE_HFLAG_NO_LBA48)
|
|
return 0;
|
|
|
|
if (!idedisk_supports_lba48(drive->id))
|
|
return -EIO;
|
|
drive->addressing = arg;
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_IDE_PROC_FS
|
|
static void idedisk_add_settings(ide_drive_t *drive)
|
|
{
|
|
struct hd_driveid *id = drive->id;
|
|
|
|
ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 65535, 1, 1,
|
|
&drive->bios_cyl, NULL);
|
|
ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
|
|
&drive->bios_head, NULL);
|
|
ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1,
|
|
&drive->bios_sect, NULL);
|
|
ide_add_setting(drive, "address", SETTING_RW, TYPE_BYTE, 0, 2, 1, 1,
|
|
&drive->addressing, set_lba_addressing);
|
|
ide_add_setting(drive, "multcount", SETTING_RW, TYPE_BYTE, 0,
|
|
id->max_multsect, 1, 1, &drive->mult_count,
|
|
set_multcount);
|
|
ide_add_setting(drive, "nowerr", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
|
|
&drive->nowerr, set_nowerr);
|
|
ide_add_setting(drive, "lun", SETTING_RW, TYPE_INT, 0, 7, 1, 1,
|
|
&drive->lun, NULL);
|
|
ide_add_setting(drive, "wcache", SETTING_RW, TYPE_BYTE, 0, 1, 1, 1,
|
|
&drive->wcache, write_cache);
|
|
ide_add_setting(drive, "acoustic", SETTING_RW, TYPE_BYTE, 0, 254, 1, 1,
|
|
&drive->acoustic, set_acoustic);
|
|
ide_add_setting(drive, "failures", SETTING_RW, TYPE_INT, 0, 65535, 1, 1,
|
|
&drive->failures, NULL);
|
|
ide_add_setting(drive, "max_failures", SETTING_RW, TYPE_INT, 0, 65535,
|
|
1, 1, &drive->max_failures, NULL);
|
|
}
|
|
#else
|
|
static inline void idedisk_add_settings(ide_drive_t *drive) { ; }
|
|
#endif
|
|
|
|
static void idedisk_setup(ide_drive_t *drive)
|
|
{
|
|
ide_hwif_t *hwif = drive->hwif;
|
|
struct hd_driveid *id = drive->id;
|
|
unsigned long long capacity;
|
|
|
|
idedisk_add_settings(drive);
|
|
|
|
if (drive->id_read == 0)
|
|
return;
|
|
|
|
if (drive->removable) {
|
|
/*
|
|
* Removable disks (eg. SYQUEST); ignore 'WD' drives
|
|
*/
|
|
if (id->model[0] != 'W' || id->model[1] != 'D')
|
|
drive->doorlocking = 1;
|
|
}
|
|
|
|
(void)set_lba_addressing(drive, 1);
|
|
|
|
if (drive->addressing == 1) {
|
|
int max_s = 2048;
|
|
|
|
if (max_s > hwif->rqsize)
|
|
max_s = hwif->rqsize;
|
|
|
|
blk_queue_max_sectors(drive->queue, max_s);
|
|
}
|
|
|
|
printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name,
|
|
drive->queue->max_sectors / 2);
|
|
|
|
/* calculate drive capacity, and select LBA if possible */
|
|
init_idedisk_capacity(drive);
|
|
|
|
/* limit drive capacity to 137GB if LBA48 cannot be used */
|
|
if (drive->addressing == 0 && drive->capacity64 > 1ULL << 28) {
|
|
printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
|
|
"%llu sectors (%llu MB)\n",
|
|
drive->name, (unsigned long long)drive->capacity64,
|
|
sectors_to_MB(drive->capacity64));
|
|
drive->capacity64 = 1ULL << 28;
|
|
}
|
|
|
|
if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && drive->addressing) {
|
|
if (drive->capacity64 > 1ULL << 28) {
|
|
printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
|
|
" will be used for accessing sectors "
|
|
"> %u\n", drive->name, 1 << 28);
|
|
} else
|
|
drive->addressing = 0;
|
|
}
|
|
|
|
/*
|
|
* if possible, give fdisk access to more of the drive,
|
|
* by correcting bios_cyls:
|
|
*/
|
|
capacity = idedisk_capacity(drive);
|
|
|
|
if (!drive->forced_geom) {
|
|
|
|
if (idedisk_supports_lba48(drive->id)) {
|
|
/* compatibility */
|
|
drive->bios_sect = 63;
|
|
drive->bios_head = 255;
|
|
}
|
|
|
|
if (drive->bios_sect && drive->bios_head) {
|
|
unsigned int cap0 = capacity; /* truncate to 32 bits */
|
|
unsigned int cylsz, cyl;
|
|
|
|
if (cap0 != capacity)
|
|
drive->bios_cyl = 65535;
|
|
else {
|
|
cylsz = drive->bios_sect * drive->bios_head;
|
|
cyl = cap0 / cylsz;
|
|
if (cyl > 65535)
|
|
cyl = 65535;
|
|
if (cyl > drive->bios_cyl)
|
|
drive->bios_cyl = cyl;
|
|
}
|
|
}
|
|
}
|
|
printk(KERN_INFO "%s: %llu sectors (%llu MB)",
|
|
drive->name, capacity, sectors_to_MB(capacity));
|
|
|
|
/* Only print cache size when it was specified */
|
|
if (id->buf_size)
|
|
printk(KERN_CONT " w/%dKiB Cache", id->buf_size / 2);
|
|
|
|
printk(KERN_CONT ", CHS=%d/%d/%d\n",
|
|
drive->bios_cyl, drive->bios_head, drive->bios_sect);
|
|
|
|
/* write cache enabled? */
|
|
if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5)))
|
|
drive->wcache = 1;
|
|
|
|
write_cache(drive, 1);
|
|
}
|
|
|
|
static void ide_cacheflush_p(ide_drive_t *drive)
|
|
{
|
|
if (!drive->wcache || !ide_id_has_flush_cache(drive->id))
|
|
return;
|
|
|
|
if (do_idedisk_flushcache(drive))
|
|
printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
|
|
}
|
|
|
|
static void ide_disk_remove(ide_drive_t *drive)
|
|
{
|
|
struct ide_disk_obj *idkp = drive->driver_data;
|
|
struct gendisk *g = idkp->disk;
|
|
|
|
ide_proc_unregister_driver(drive, idkp->driver);
|
|
|
|
del_gendisk(g);
|
|
|
|
ide_cacheflush_p(drive);
|
|
|
|
ide_disk_put(idkp);
|
|
}
|
|
|
|
static void ide_disk_release(struct kref *kref)
|
|
{
|
|
struct ide_disk_obj *idkp = to_ide_disk(kref);
|
|
ide_drive_t *drive = idkp->drive;
|
|
struct gendisk *g = idkp->disk;
|
|
|
|
drive->driver_data = NULL;
|
|
g->private_data = NULL;
|
|
put_disk(g);
|
|
kfree(idkp);
|
|
}
|
|
|
|
static int ide_disk_probe(ide_drive_t *drive);
|
|
|
|
/*
|
|
* On HPA drives the capacity needs to be
|
|
* reinitilized on resume otherwise the disk
|
|
* can not be used and a hard reset is required
|
|
*/
|
|
static void ide_disk_resume(ide_drive_t *drive)
|
|
{
|
|
if (idedisk_supports_hpa(drive->id))
|
|
init_idedisk_capacity(drive);
|
|
}
|
|
|
|
static void ide_device_shutdown(ide_drive_t *drive)
|
|
{
|
|
#ifdef CONFIG_ALPHA
|
|
/* On Alpha, halt(8) doesn't actually turn the machine off,
|
|
it puts you into the sort of firmware monitor. Typically,
|
|
it's used to boot another kernel image, so it's not much
|
|
different from reboot(8). Therefore, we don't need to
|
|
spin down the disk in this case, especially since Alpha
|
|
firmware doesn't handle disks in standby mode properly.
|
|
On the other hand, it's reasonably safe to turn the power
|
|
off when the shutdown process reaches the firmware prompt,
|
|
as the firmware initialization takes rather long time -
|
|
at least 10 seconds, which should be sufficient for
|
|
the disk to expire its write cache. */
|
|
if (system_state != SYSTEM_POWER_OFF) {
|
|
#else
|
|
if (system_state == SYSTEM_RESTART) {
|
|
#endif
|
|
ide_cacheflush_p(drive);
|
|
return;
|
|
}
|
|
|
|
printk(KERN_INFO "Shutdown: %s\n", drive->name);
|
|
|
|
drive->gendev.bus->suspend(&drive->gendev, PMSG_SUSPEND);
|
|
}
|
|
|
|
static ide_driver_t idedisk_driver = {
|
|
.gen_driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ide-disk",
|
|
.bus = &ide_bus_type,
|
|
},
|
|
.probe = ide_disk_probe,
|
|
.remove = ide_disk_remove,
|
|
.resume = ide_disk_resume,
|
|
.shutdown = ide_device_shutdown,
|
|
.version = IDEDISK_VERSION,
|
|
.media = ide_disk,
|
|
.supports_dsc_overlap = 0,
|
|
.do_request = ide_do_rw_disk,
|
|
.end_request = ide_end_request,
|
|
.error = __ide_error,
|
|
#ifdef CONFIG_IDE_PROC_FS
|
|
.proc = idedisk_proc,
|
|
#endif
|
|
};
|
|
|
|
static int idedisk_set_doorlock(ide_drive_t *drive, int on)
|
|
{
|
|
ide_task_t task;
|
|
|
|
memset(&task, 0, sizeof(task));
|
|
task.tf.command = on ? WIN_DOORLOCK : WIN_DOORUNLOCK;
|
|
task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
|
|
|
|
return ide_no_data_taskfile(drive, &task);
|
|
}
|
|
|
|
static int idedisk_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct gendisk *disk = inode->i_bdev->bd_disk;
|
|
struct ide_disk_obj *idkp;
|
|
ide_drive_t *drive;
|
|
|
|
idkp = ide_disk_get(disk);
|
|
if (idkp == NULL)
|
|
return -ENXIO;
|
|
|
|
drive = idkp->drive;
|
|
|
|
idkp->openers++;
|
|
|
|
if (drive->removable && idkp->openers == 1) {
|
|
check_disk_change(inode->i_bdev);
|
|
/*
|
|
* Ignore the return code from door_lock,
|
|
* since the open() has already succeeded,
|
|
* and the door_lock is irrelevant at this point.
|
|
*/
|
|
if (drive->doorlocking && idedisk_set_doorlock(drive, 1))
|
|
drive->doorlocking = 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int idedisk_release(struct inode *inode, struct file *filp)
|
|
{
|
|
struct gendisk *disk = inode->i_bdev->bd_disk;
|
|
struct ide_disk_obj *idkp = ide_disk_g(disk);
|
|
ide_drive_t *drive = idkp->drive;
|
|
|
|
if (idkp->openers == 1)
|
|
ide_cacheflush_p(drive);
|
|
|
|
if (drive->removable && idkp->openers == 1) {
|
|
if (drive->doorlocking && idedisk_set_doorlock(drive, 0))
|
|
drive->doorlocking = 0;
|
|
}
|
|
|
|
idkp->openers--;
|
|
|
|
ide_disk_put(idkp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int idedisk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
|
|
{
|
|
struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
|
|
ide_drive_t *drive = idkp->drive;
|
|
|
|
geo->heads = drive->bios_head;
|
|
geo->sectors = drive->bios_sect;
|
|
geo->cylinders = (u16)drive->bios_cyl; /* truncate */
|
|
return 0;
|
|
}
|
|
|
|
static int idedisk_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
unsigned long flags;
|
|
struct block_device *bdev = inode->i_bdev;
|
|
struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
|
|
ide_drive_t *drive = idkp->drive;
|
|
int err, (*setfunc)(ide_drive_t *, int);
|
|
u8 *val;
|
|
|
|
switch (cmd) {
|
|
case HDIO_GET_ADDRESS: val = &drive->addressing; goto read_val;
|
|
case HDIO_GET_MULTCOUNT: val = &drive->mult_count; goto read_val;
|
|
case HDIO_GET_NOWERR: val = &drive->nowerr; goto read_val;
|
|
case HDIO_GET_WCACHE: val = &drive->wcache; goto read_val;
|
|
case HDIO_GET_ACOUSTIC: val = &drive->acoustic; goto read_val;
|
|
case HDIO_SET_ADDRESS: setfunc = set_lba_addressing; goto set_val;
|
|
case HDIO_SET_MULTCOUNT: setfunc = set_multcount; goto set_val;
|
|
case HDIO_SET_NOWERR: setfunc = set_nowerr; goto set_val;
|
|
case HDIO_SET_WCACHE: setfunc = write_cache; goto set_val;
|
|
case HDIO_SET_ACOUSTIC: setfunc = set_acoustic; goto set_val;
|
|
}
|
|
|
|
return generic_ide_ioctl(drive, file, bdev, cmd, arg);
|
|
|
|
read_val:
|
|
mutex_lock(&ide_setting_mtx);
|
|
spin_lock_irqsave(&ide_lock, flags);
|
|
err = *val;
|
|
spin_unlock_irqrestore(&ide_lock, flags);
|
|
mutex_unlock(&ide_setting_mtx);
|
|
return err >= 0 ? put_user(err, (long __user *)arg) : err;
|
|
|
|
set_val:
|
|
if (bdev != bdev->bd_contains)
|
|
err = -EINVAL;
|
|
else {
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
err = -EACCES;
|
|
else {
|
|
mutex_lock(&ide_setting_mtx);
|
|
err = setfunc(drive, arg);
|
|
mutex_unlock(&ide_setting_mtx);
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int idedisk_media_changed(struct gendisk *disk)
|
|
{
|
|
struct ide_disk_obj *idkp = ide_disk_g(disk);
|
|
ide_drive_t *drive = idkp->drive;
|
|
|
|
/* do not scan partitions twice if this is a removable device */
|
|
if (drive->attach) {
|
|
drive->attach = 0;
|
|
return 0;
|
|
}
|
|
/* if removable, always assume it was changed */
|
|
return drive->removable;
|
|
}
|
|
|
|
static int idedisk_revalidate_disk(struct gendisk *disk)
|
|
{
|
|
struct ide_disk_obj *idkp = ide_disk_g(disk);
|
|
set_capacity(disk, idedisk_capacity(idkp->drive));
|
|
return 0;
|
|
}
|
|
|
|
static struct block_device_operations idedisk_ops = {
|
|
.owner = THIS_MODULE,
|
|
.open = idedisk_open,
|
|
.release = idedisk_release,
|
|
.ioctl = idedisk_ioctl,
|
|
.getgeo = idedisk_getgeo,
|
|
.media_changed = idedisk_media_changed,
|
|
.revalidate_disk = idedisk_revalidate_disk
|
|
};
|
|
|
|
MODULE_DESCRIPTION("ATA DISK Driver");
|
|
|
|
static int ide_disk_probe(ide_drive_t *drive)
|
|
{
|
|
struct ide_disk_obj *idkp;
|
|
struct gendisk *g;
|
|
|
|
/* strstr("foo", "") is non-NULL */
|
|
if (!strstr("ide-disk", drive->driver_req))
|
|
goto failed;
|
|
if (!drive->present)
|
|
goto failed;
|
|
if (drive->media != ide_disk)
|
|
goto failed;
|
|
|
|
idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
|
|
if (!idkp)
|
|
goto failed;
|
|
|
|
g = alloc_disk_node(1 << PARTN_BITS,
|
|
hwif_to_node(drive->hwif));
|
|
if (!g)
|
|
goto out_free_idkp;
|
|
|
|
ide_init_disk(g, drive);
|
|
|
|
ide_proc_register_driver(drive, &idedisk_driver);
|
|
|
|
kref_init(&idkp->kref);
|
|
|
|
idkp->drive = drive;
|
|
idkp->driver = &idedisk_driver;
|
|
idkp->disk = g;
|
|
|
|
g->private_data = &idkp->driver;
|
|
|
|
drive->driver_data = idkp;
|
|
|
|
idedisk_setup(drive);
|
|
if ((!drive->head || drive->head > 16) && !drive->select.b.lba) {
|
|
printk(KERN_ERR "%s: INVALID GEOMETRY: %d PHYSICAL HEADS?\n",
|
|
drive->name, drive->head);
|
|
drive->attach = 0;
|
|
} else
|
|
drive->attach = 1;
|
|
|
|
g->minors = 1 << PARTN_BITS;
|
|
g->driverfs_dev = &drive->gendev;
|
|
g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
|
|
set_capacity(g, idedisk_capacity(drive));
|
|
g->fops = &idedisk_ops;
|
|
add_disk(g);
|
|
return 0;
|
|
|
|
out_free_idkp:
|
|
kfree(idkp);
|
|
failed:
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void __exit idedisk_exit(void)
|
|
{
|
|
driver_unregister(&idedisk_driver.gen_driver);
|
|
}
|
|
|
|
static int __init idedisk_init(void)
|
|
{
|
|
return driver_register(&idedisk_driver.gen_driver);
|
|
}
|
|
|
|
MODULE_ALIAS("ide:*m-disk*");
|
|
module_init(idedisk_init);
|
|
module_exit(idedisk_exit);
|
|
MODULE_LICENSE("GPL");
|