We fall back to non-pipelined operation through idetape_queue_rw_tail with cmd
set to REQ_IDETAPE_READ. Also, remove idetape_switch_buffers() since it becomes
unused.
Signed-off-by: Borislav Petkov <petkovbb@xxxxxxxxx>
---
drivers/ide/ide-tape.c | 46 +---------------------------------------------
1 files changed, 1 insertions(+), 45 deletions(-)
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index abf3efa..e919d41 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -1776,16 +1776,6 @@ static void idetape_init_merge_stage(idetape_tape_t *tape)
}
}
-static void idetape_switch_buffers(idetape_tape_t *tape, idetape_stage_t *stage)
-{
- struct idetape_bh *tmp;
-
- tmp = stage->bh;
- stage->bh = tape->merge_stage->bh;
- tape->merge_stage->bh = tmp;
- idetape_init_merge_stage(tape);
-}
-
/* Add a new stage at the end of the pipeline. */
static void idetape_add_stage_tail(ide_drive_t *drive, idetape_stage_t *stage)
{
@@ -2403,9 +2393,6 @@ static int idetape_init_read(ide_drive_t *drive, int max_stages)
static int idetape_add_chrdev_read_request(ide_drive_t *drive, int blocks)
{
idetape_tape_t *tape = drive->driver_data;
- unsigned long flags;
- struct request *rq_ptr;
- int bytes_read;
debug_log(DBG_PROCS, "Enter %s, %d blocks\n", __func__, blocks);
@@ -2413,39 +2400,8 @@ static int idetape_add_chrdev_read_request(ide_drive_t *drive, int blocks)
if (test_bit(IDETAPE_FLAG_FILEMARK, &tape->flags))
return 0;
- /* Wait for the next block to reach the head of the pipeline. */
- idetape_init_read(drive, tape->max_stages);
- if (tape->first_stage == NULL) {
- if (test_bit(IDETAPE_FLAG_PIPELINE_ERR, &tape->flags))
- return 0;
- return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, blocks,
+ return idetape_queue_rw_tail(drive, REQ_IDETAPE_READ, blocks,
tape->merge_stage->bh);
- }
- idetape_wait_first_stage(drive);
- rq_ptr = &tape->first_stage->rq;
- bytes_read = tape->blk_size * (rq_ptr->nr_sectors -
- rq_ptr->current_nr_sectors);
- rq_ptr->nr_sectors = 0;
- rq_ptr->current_nr_sectors = 0;
-
- if (rq_ptr->errors == IDETAPE_ERROR_EOD)
- return 0;
- else {
- idetape_switch_buffers(tape, tape->first_stage);
- if (rq_ptr->errors == IDETAPE_ERROR_FILEMARK)
- set_bit(IDETAPE_FLAG_FILEMARK, &tape->flags);
- spin_lock_irqsave(&tape->lock, flags);
- idetape_remove_stage_head(drive);
- spin_unlock_irqrestore(&tape->lock, flags);
- tape->pipeline_head++;
- idetape_calculate_speeds(drive);
- }
- if (bytes_read > blocks * tape->blk_size) {
- printk(KERN_ERR "ide-tape: bug: trying to return more bytes"
- " than requested\n");
- bytes_read = blocks * tape->blk_size;
- }
- return (bytes_read);
}
static void idetape_pad_zeros(ide_drive_t *drive, int bcount)
--
1.5.4.1
--
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