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ide: Remove ide_spin_wait_hwgroup() and use special requests instead

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Use a special request for serialisation purposes and get rid of the
awkward ide_spin_wait_hwgroup(). This also involves converting the
ide_devset structure so it can be shared by the /proc and the ioctl code.

Signed-off-by: Elias Oltmanns <eo@nebensachen.de>
[bart: use rq->cmd[] directly]
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Elias Oltmanns
2008-10-10 22:39:40 +02:00
committed by Bartlomiej Zolnierkiewicz
parent d6e2955a6b
commit 92f1f8fd80
10 changed files with 271 additions and 281 deletions
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40
drivers/ide/ide-io.c
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@@ -716,9 +716,49 @@ static ide_startstop_t execute_drive_cmd (ide_drive_t *drive,
return ide_stopped;
}
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_KERNEL);
if (!rq)
return -ENOMEM;
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;
}
EXPORT_SYMBOL_GPL(ide_devset_execute);
static ide_startstop_t ide_special_rq(ide_drive_t *drive, struct request *rq)
{
switch (rq->cmd[0]) {
case REQ_DEVSET_EXEC:
{
int err, (*setfunc)(ide_drive_t *, int) = rq->special;
err = setfunc(drive, *(int *)&rq->cmd[1]);
if (err)
rq->errors = err;
else
err = 1;
ide_end_request(drive, err, 0);
return ide_stopped;
}
case REQ_DRIVE_RESET:
return ide_do_reset(drive);
default: