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

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    req->cmd[4] = cmd_len;
    if (drive->media == ide_tape)
        req->cmd[13] = REQ_IDETAPE_PC1;
​
    drive->sense_rq_armed = true;
}
EXPORT_SYMBOL_GPL(ide_prep_sense);
​
int ide_queue_sense_rq(ide_drive_t *drive, void *special)
{
    struct request *sense_rq = drive->sense_rq;
    ide_hwif_t *hwif = drive->hwif;
    struct request *sense_rq;
    unsigned long flags;
​
    spin_lock_irqsave(&hwif->lock, flags);
​
    /* deferred failure from ide_prep_sense() */
    if (!drive->sense_rq_armed) {
        printk(KERN_WARNING PFX "%s: error queuing a sense request\n",
               drive->name);
        spin_unlock_irqrestore(&hwif->lock, flags);
        return -ENOMEM;
    }
​
    sense_rq = drive->sense_rq;
    ide_req(sense_rq)->special = special;
    drive->sense_rq_armed = false;
​
    drive->hwif->rq = NULL;
​
    ide_insert_request_head(drive, sense_rq);
    spin_unlock_irqrestore(&hwif->lock, flags);
    return 0;
}
EXPORT_SYMBOL_GPL(ide_queue_sense_rq);
​
/*
 * Called when an error was detected during the last packet command.
 * We queue a request sense packet command at the head of the request
 * queue.
 */
void ide_retry_pc(ide_drive_t *drive)