aboutsummaryrefslogtreecommitdiff
path: root/drivers/ide/ide-io.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/ide/ide-io.c')
-rw-r--r--drivers/ide/ide-io.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index ec6664b0d3a..1c51949833b 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -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: