ide: add ide_set_media_lock() helper

* Set IDE_AFLAG_NO_DOORLOCK in idetape_get_mode_sense_result(), check it
  in ide_tape_set_media_lock() and cleanup idetape_create_prevent_cmd().

* Set IDE_AFLAG_NO_DOORLOCK in ide_floppy_create_read_capacity_cmd() and
  check it instead of IDE_AFLAG_CLIK_DRIVE in ide_floppy_set_media_lock().

* Add ide_set_media_lock() helper and convert ide-{floppy,tape}.c to use it.

* Remove no longer used ide*_create_prevent_cmd()/ide*_set_media_lock().

* Update comment in <linux/ide.h> accordingly.
Acked-by: 's avatarBorislav Petkov <petkovbb@gmail.com>
Signed-off-by: 's avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 0127854d
......@@ -162,6 +162,21 @@ int ide_queue_pc_tail(ide_drive_t *drive, struct gendisk *disk,
}
EXPORT_SYMBOL_GPL(ide_queue_pc_tail);
int ide_set_media_lock(ide_drive_t *drive, struct gendisk *disk, int on)
{
struct ide_atapi_pc pc;
if (drive->atapi_flags & IDE_AFLAG_NO_DOORLOCK)
return 0;
ide_init_pc(&pc);
pc.c[0] = ALLOW_MEDIUM_REMOVAL;
pc.c[4] = on;
return ide_queue_pc_tail(drive, disk, &pc);
}
EXPORT_SYMBOL_GPL(ide_set_media_lock);
/* TODO: unify the code thus making some arguments go away */
ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
......
......@@ -325,15 +325,6 @@ static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
IDEFLOPPY_WAIT_CMD, NULL);
}
static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
{
debug_log("creating prevent removal command, prevent = %d\n", prevent);
ide_init_pc(pc);
pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
pc->c[4] = prevent;
}
void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
{
ide_init_pc(pc);
......@@ -712,6 +703,8 @@ static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
blk_queue_max_sectors(drive->queue, 64);
drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
/* IOMEGA Clik! drives do not support lock/unlock commands */
drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
}
(void) ide_floppy_get_capacity(drive);
......@@ -782,18 +775,6 @@ static ide_driver_t idefloppy_driver = {
#endif
};
static void ide_floppy_set_media_lock(ide_drive_t *drive, int on)
{
struct ide_floppy_obj *floppy = drive->driver_data;
struct ide_atapi_pc pc;
/* IOMEGA Clik! drives do not support lock/unlock commands */
if ((drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE) == 0) {
idefloppy_create_prevent_cmd(&pc, on);
(void)ide_queue_pc_tail(drive, floppy->disk, &pc);
}
}
static int idefloppy_open(struct inode *inode, struct file *filp)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
......@@ -842,7 +823,7 @@ static int idefloppy_open(struct inode *inode, struct file *filp)
}
drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
ide_floppy_set_media_lock(drive, 1);
ide_set_media_lock(drive, disk, 1);
check_disk_change(inode->i_bdev);
} else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
ret = -EBUSY;
......@@ -865,7 +846,7 @@ static int idefloppy_release(struct inode *inode, struct file *filp)
debug_log("Reached %s\n", __func__);
if (floppy->openers == 1) {
ide_floppy_set_media_lock(drive, 0);
ide_set_media_lock(drive, disk, 0);
drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
}
......@@ -891,16 +872,17 @@ static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
unsigned long arg, unsigned int cmd)
{
idefloppy_floppy_t *floppy = drive->driver_data;
struct gendisk *disk = floppy->disk;
int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
if (floppy->openers > 1)
return -EBUSY;
ide_floppy_set_media_lock(drive, prevent);
ide_set_media_lock(drive, disk, prevent);
if (cmd == CDROMEJECT) {
idefloppy_create_start_stop_cmd(pc, 2);
(void)ide_queue_pc_tail(drive, floppy->disk, pc);
(void)ide_queue_pc_tail(drive, disk, pc);
}
return 0;
......
......@@ -1214,32 +1214,6 @@ static void idetape_create_locate_cmd(ide_drive_t *drive,
pc->flags |= PC_FLAG_WAIT_FOR_DSC;
}
static int idetape_create_prevent_cmd(ide_drive_t *drive,
struct ide_atapi_pc *pc, int prevent)
{
idetape_tape_t *tape = drive->driver_data;
/* device supports locking according to capabilities page */
if (!(tape->caps[6] & 0x01))
return 0;
ide_init_pc(pc);
pc->c[0] = ALLOW_MEDIUM_REMOVAL;
pc->c[4] = prevent;
return 1;
}
static int ide_tape_set_media_lock(ide_drive_t *drive, int on)
{
struct ide_tape_obj *tape = drive->driver_data;
struct ide_atapi_pc pc;
if (!idetape_create_prevent_cmd(drive, &pc, on))
return 0;
return ide_queue_pc_tail(drive, tape->disk, &pc);
}
static void __ide_tape_discard_merge_buffer(ide_drive_t *drive)
{
idetape_tape_t *tape = drive->driver_data;
......@@ -1872,7 +1846,7 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
* attempting to eject.
*/
if (tape->door_locked) {
if (!ide_tape_set_media_lock(drive, 0))
if (!ide_set_media_lock(drive, disk, 0))
tape->door_locked = DOOR_UNLOCKED;
}
ide_tape_discard_merge_buffer(drive, 0);
......@@ -1917,13 +1891,13 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
case MTFSR:
case MTBSR:
case MTLOCK:
retval = ide_tape_set_media_lock(drive, 1);
retval = ide_set_media_lock(drive, disk, 1);
if (retval)
return retval;
tape->door_locked = DOOR_EXPLICITLY_LOCKED;
return 0;
case MTUNLOCK:
retval = ide_tape_set_media_lock(drive, 0);
retval = ide_set_media_lock(drive, disk, 0);
if (retval)
return retval;
tape->door_locked = DOOR_UNLOCKED;
......@@ -2087,7 +2061,7 @@ static int idetape_chrdev_open(struct inode *inode, struct file *filp)
/* Lock the tape drive door so user can't eject. */
if (tape->chrdev_dir == IDETAPE_DIR_NONE) {
if (!ide_tape_set_media_lock(drive, 1)) {
if (!ide_set_media_lock(drive, tape->disk, 1)) {
if (tape->door_locked != DOOR_EXPLICITLY_LOCKED)
tape->door_locked = DOOR_LOCKED;
}
......@@ -2140,7 +2114,7 @@ static int idetape_chrdev_release(struct inode *inode, struct file *filp)
(void) idetape_rewind_tape(drive);
if (tape->chrdev_dir == IDETAPE_DIR_NONE) {
if (tape->door_locked == DOOR_LOCKED) {
if (!ide_tape_set_media_lock(drive, 0))
if (!ide_set_media_lock(drive, tape->disk, 0))
tape->door_locked = DOOR_UNLOCKED;
}
}
......@@ -2218,6 +2192,11 @@ static void idetape_get_mode_sense_results(ide_drive_t *drive)
}
memcpy(&tape->caps, caps, 20);
/* device lacks locking support according to capabilities page */
if ((caps[6] & 1) == 0)
drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
if (caps[7] & 0x02)
tape->blk_size = 512;
else if (caps[7] & 0x04)
......
......@@ -317,10 +317,10 @@ struct ide_acpi_hwif_link;
enum {
IDE_AFLAG_DRQ_INTERRUPT = (1 << 0),
IDE_AFLAG_MEDIA_CHANGED = (1 << 1),
/* ide-cd */
/* Drive cannot lock the door. */
IDE_AFLAG_NO_DOORLOCK = (1 << 2),
/* ide-cd */
/* Drive cannot eject the disc. */
IDE_AFLAG_NO_EJECT = (1 << 3),
/* Drive is a pre ATAPI 1.2 drive. */
......@@ -1142,6 +1142,8 @@ void ide_queue_pc_head(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *,
struct request *);
int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *);
int ide_set_media_lock(ide_drive_t *, struct gendisk *, int);
ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),
......
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