- /* Attempt to allocate a new stage. Beware possible race conditions. */
- while (1) {
- spin_lock_irqsave(&tape->lock, flags);
- if (test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags)) {
- idetape_wait_for_request(drive, tape->active_data_rq);
- spin_unlock_irqrestore(&tape->lock, flags);
- } else {
- spin_unlock_irqrestore(&tape->lock, flags);
- idetape_plug_pipeline(drive);
- if (test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE,
- &tape->flags))
- continue;
- return idetape_queue_rw_tail(drive, REQ_IDETAPE_WRITE,
- blocks, tape->merge_stage->bh);
- }
- }
-}
-
-/*
- * Wait until all pending pipeline requests are serviced. Typically called on
- * device close.
- */
-static void idetape_wait_for_pipeline(ide_drive_t *drive)
-{
- idetape_tape_t *tape = drive->driver_data;
- unsigned long flags;
-
- while (tape->next_stage || test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE,
- &tape->flags)) {
- idetape_plug_pipeline(drive);
- spin_lock_irqsave(&tape->lock, flags);
- if (test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags))
- idetape_wait_for_request(drive, tape->active_data_rq);
- spin_unlock_irqrestore(&tape->lock, flags);
- }