ide: set REQ_PREEMPT request flag in ide_do_drive_cmd() users

* Set REQ_PREEMPT request flag in ide_do_drive_cmd() users
  for ide_preempt and ide_head_wait action types.

* Remove setting REQ_PREEMPT from ide_do_drive_cmd().

While at it:

* Set 'where' variable outside ide_lock.

This is a preparation for converting IDE to use blk_execute_rq().

There should be no functional changes caused by this patch.

Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Borislav Petkov <petkovbb@gmail.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/ide-cd.c

@@ -216,6 +216,7 @@ static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
 	rq->data_len = 18;
 
 	rq->cmd_type = REQ_TYPE_SENSE;
+	rq->cmd_flags |= REQ_PREEMPT;
 
 	/* NOTE! Save the failed command in "rq->buffer" */
 	rq->buffer = (void *) failed_command;

drivers/ide/ide-floppy.c

@@ -289,6 +289,7 @@ static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 	ide_init_drive_cmd(rq);
 	rq->buffer = (char *) pc;
 	rq->cmd_type = REQ_TYPE_SPECIAL;
+	rq->cmd_flags |= REQ_PREEMPT;
 	rq->rq_disk = floppy->disk;
 	(void) ide_do_drive_cmd(drive, rq, ide_preempt);
 }

drivers/ide/ide-io.c

@@ -1600,13 +1600,12 @@ int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t actio
 		rq->end_io = blk_end_sync_rq;
 	}
 
+	if (action == ide_preempt || action == ide_head_wait)
+		where = ELEVATOR_INSERT_FRONT;
+
 	spin_lock_irqsave(&ide_lock, flags);
 	if (action == ide_preempt)
 		hwgroup->rq = NULL;
-	if (action == ide_preempt || action == ide_head_wait) {
-		where = ELEVATOR_INSERT_FRONT;
-		rq->cmd_flags |= REQ_PREEMPT;
-	}
 	__elv_add_request(drive->queue, rq, where, 0);
 	ide_do_request(hwgroup, IDE_NO_IRQ);
 	spin_unlock_irqrestore(&ide_lock, flags);

drivers/ide/ide-tape.c

@@ -688,6 +688,7 @@ static void idetape_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
 	struct ide_tape_obj *tape = drive->driver_data;
 
 	idetape_init_rq(rq, REQ_IDETAPE_PC1);
+	rq->cmd_flags |= REQ_PREEMPT;
 	rq->buffer = (char *) pc;
 	rq->rq_disk = tape->disk;
 	(void) ide_do_drive_cmd(drive, rq, ide_preempt);

drivers/ide/ide.c

@@ -606,6 +606,7 @@ static int generic_ide_resume(struct device *dev)
 	memset(&rqpm, 0, sizeof(rqpm));
 	memset(&args, 0, sizeof(args));
 	rq.cmd_type = REQ_TYPE_PM_RESUME;
+	rq.cmd_flags |= REQ_PREEMPT;
 	rq.special = &args;
 	rq.data = &rqpm;
 	rqpm.pm_step = ide_pm_state_start_resume;

drivers/scsi/ide-scsi.c

@@ -235,6 +235,7 @@ static int idescsi_check_condition(ide_drive_t *drive,
 	pc->c[0] = REQUEST_SENSE;
 	pc->c[4] = pc->req_xfer = pc->buf_size = SCSI_SENSE_BUFFERSIZE;
 	rq->cmd_type = REQ_TYPE_SENSE;
+	rq->cmd_flags |= REQ_PREEMPT;
 	pc->timeout = jiffies + WAIT_READY;
 	/* NOTE! Save the failed packet command in "rq->buffer" */
 	rq->buffer = (void *) failed_cmd->special;