Source of ide-taskfile.c - linux-imx - PHYTEC BitBucket (Stash)

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     * if we would find a solution to transfer any size.
     * To support special commands like READ LONG.
     */
    if (nsect) {
        error = blk_rq_map_kern(drive->queue, rq, buf,
                    nsect * SECTOR_SIZE, GFP_NOIO);
        if (error)
            goto put_req;
    }
​
    rq->special = cmd;
    ide_req(rq)->special = cmd;
    cmd->rq = rq;
​
    blk_execute_rq(drive->queue, NULL, rq, 0);
    error = scsi_req(rq)->result ? -EIO : 0;
put_req:
    blk_put_request(rq);
    return error;
}
EXPORT_SYMBOL(ide_raw_taskfile);
​