linux-hardened/drivers/ide/ide-devsets.c
Bartlomiej Zolnierkiewicz 130e886708 ide: remove ide_end_request()
* Add ide_rq_bytes() helper.

* Add blk_noretry_request() quirk to ide_complete_rq() (currently only fs
  requests can be marked as "noretry" so there is no change in behavior).

* Switch current ide_end_request() users to use ide_complete_rq().

  [ No need to check for rq->nr_sectors == 0 in {ide_dma,task_pio}_intr(),
    nsectors == 0 in cdrom_end_request() and err == 0 in ide_do_devset(). ]

* Remove no longer needed ide_end_request().

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2009-03-27 12:46:45 +01:00

188 lines
3.8 KiB
C

#include <linux/kernel.h>
#include <linux/ide.h>
DEFINE_MUTEX(ide_setting_mtx);
ide_devset_get(io_32bit, io_32bit);
static int set_io_32bit(ide_drive_t *drive, int arg)
{
if (drive->dev_flags & IDE_DFLAG_NO_IO_32BIT)
return -EPERM;
if (arg < 0 || arg > 1 + (SUPPORT_VLB_SYNC << 1))
return -EINVAL;
drive->io_32bit = arg;
return 0;
}
ide_devset_get_flag(ksettings, IDE_DFLAG_KEEP_SETTINGS);
static int set_ksettings(ide_drive_t *drive, int arg)
{
if (arg < 0 || arg > 1)
return -EINVAL;
if (arg)
drive->dev_flags |= IDE_DFLAG_KEEP_SETTINGS;
else
drive->dev_flags &= ~IDE_DFLAG_KEEP_SETTINGS;
return 0;
}
ide_devset_get_flag(using_dma, IDE_DFLAG_USING_DMA);
static int set_using_dma(ide_drive_t *drive, int arg)
{
#ifdef CONFIG_BLK_DEV_IDEDMA
int err = -EPERM;
if (arg < 0 || arg > 1)
return -EINVAL;
if (ata_id_has_dma(drive->id) == 0)
goto out;
if (drive->hwif->dma_ops == NULL)
goto out;
err = 0;
if (arg) {
if (ide_set_dma(drive))
err = -EIO;
} else
ide_dma_off(drive);
out:
return err;
#else
if (arg < 0 || arg > 1)
return -EINVAL;
return -EPERM;
#endif
}
/*
* handle HDIO_SET_PIO_MODE ioctl abusers here, eventually it will go away
*/
static int set_pio_mode_abuse(ide_hwif_t *hwif, u8 req_pio)
{
switch (req_pio) {
case 202:
case 201:
case 200:
case 102:
case 101:
case 100:
return (hwif->host_flags & IDE_HFLAG_ABUSE_DMA_MODES) ? 1 : 0;
case 9:
case 8:
return (hwif->host_flags & IDE_HFLAG_ABUSE_PREFETCH) ? 1 : 0;
case 7:
case 6:
return (hwif->host_flags & IDE_HFLAG_ABUSE_FAST_DEVSEL) ? 1 : 0;
default:
return 0;
}
}
static int set_pio_mode(ide_drive_t *drive, int arg)
{
ide_hwif_t *hwif = drive->hwif;
const struct ide_port_ops *port_ops = hwif->port_ops;
if (arg < 0 || arg > 255)
return -EINVAL;
if (port_ops == NULL || port_ops->set_pio_mode == NULL ||
(hwif->host_flags & IDE_HFLAG_NO_SET_MODE))
return -ENOSYS;
if (set_pio_mode_abuse(drive->hwif, arg)) {
if (arg == 8 || arg == 9) {
unsigned long flags;
/* take lock for IDE_DFLAG_[NO_]UNMASK/[NO_]IO_32BIT */
spin_lock_irqsave(&hwif->lock, flags);
port_ops->set_pio_mode(drive, arg);
spin_unlock_irqrestore(&hwif->lock, flags);
} else
port_ops->set_pio_mode(drive, arg);
} else {
int keep_dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
ide_set_pio(drive, arg);
if (hwif->host_flags & IDE_HFLAG_SET_PIO_MODE_KEEP_DMA) {
if (keep_dma)
ide_dma_on(drive);
}
}
return 0;
}
ide_devset_get_flag(unmaskirq, IDE_DFLAG_UNMASK);
static int set_unmaskirq(ide_drive_t *drive, int arg)
{
if (drive->dev_flags & IDE_DFLAG_NO_UNMASK)
return -EPERM;
if (arg < 0 || arg > 1)
return -EINVAL;
if (arg)
drive->dev_flags |= IDE_DFLAG_UNMASK;
else
drive->dev_flags &= ~IDE_DFLAG_UNMASK;
return 0;
}
ide_ext_devset_rw_sync(io_32bit, io_32bit);
ide_ext_devset_rw_sync(keepsettings, ksettings);
ide_ext_devset_rw_sync(unmaskirq, unmaskirq);
ide_ext_devset_rw_sync(using_dma, using_dma);
__IDE_DEVSET(pio_mode, DS_SYNC, NULL, set_pio_mode);
int ide_devset_execute(ide_drive_t *drive, const struct ide_devset *setting,
int arg)
{
struct request_queue *q = drive->queue;
struct request *rq;
int ret = 0;
if (!(setting->flags & DS_SYNC))
return setting->set(drive, arg);
rq = blk_get_request(q, READ, __GFP_WAIT);
rq->cmd_type = REQ_TYPE_SPECIAL;
rq->cmd_len = 5;
rq->cmd[0] = REQ_DEVSET_EXEC;
*(int *)&rq->cmd[1] = arg;
rq->special = setting->set;
if (blk_execute_rq(q, NULL, rq, 0))
ret = rq->errors;
blk_put_request(rq);
return ret;
}
ide_startstop_t ide_do_devset(ide_drive_t *drive, struct request *rq)
{
int err, (*setfunc)(ide_drive_t *, int) = rq->special;
err = setfunc(drive, *(int *)&rq->cmd[1]);
if (err)
rq->errors = err;
ide_complete_rq(drive, err, ide_rq_bytes(rq));
return ide_stopped;
}