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authorBorislav Petkov <petkovbb@googlemail.com>2008-04-27 15:38:27 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-04-27 15:38:27 +0200
commit189bb3b345f59b11484b43f2717a66824acdc548 (patch)
tree275b027fee8e6e75e194f6b76120918748ada706 /drivers/ide
parent473567f1a4996a49cb5456e55815051a6e6eb3f1 (diff)
ide-tape: remove pipeline-specific code from idetape_end_request()
As a side effect, remove unused idetape_kfree_stage() and idetape_abort_pipeline() [bart: resurrect taking tape->lock + clearing IDETAPE_FLAG_PIPELINE_ACTIVE] Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide')
-rw-r--r--drivers/ide/ide-tape.c80
1 files changed, 1 insertions, 79 deletions
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index cbba475ebc5..d907abaed90 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -686,37 +686,6 @@ static void __idetape_kfree_stage(idetape_stage_t *stage)
kfree(stage);
}
-static void idetape_kfree_stage(idetape_tape_t *tape, idetape_stage_t *stage)
-{
- __idetape_kfree_stage(stage);
-}
-
-/*
- * This will free all the pipeline stages starting from new_last_stage->next
- * to the end of the list, and point tape->last_stage to new_last_stage.
- */
-static void idetape_abort_pipeline(ide_drive_t *drive,
- idetape_stage_t *new_last_stage)
-{
- idetape_tape_t *tape = drive->driver_data;
- idetape_stage_t *stage = new_last_stage->next;
- idetape_stage_t *nstage;
-
- debug_log(DBG_PROCS, "%s: Enter %s\n", tape->name, __func__);
-
- while (stage) {
- nstage = stage->next;
- idetape_kfree_stage(tape, stage);
- --tape->nr_stages;
- --tape->nr_pending_stages;
- stage = nstage;
- }
- if (new_last_stage)
- new_last_stage->next = NULL;
- tape->last_stage = new_last_stage;
- tape->next_stage = NULL;
-}
-
/*
* Finish servicing a request and insert a pending pipeline request into the
* main device queue.
@@ -727,7 +696,6 @@ static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
idetape_tape_t *tape = drive->driver_data;
unsigned long flags;
int error;
- idetape_stage_t *active_stage;
debug_log(DBG_PROCS, "Enter %s\n", __func__);
@@ -747,55 +715,9 @@ static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
spin_lock_irqsave(&tape->lock, flags);
- /* The request was a pipelined data transfer request */
- if (tape->active_data_rq == rq) {
- active_stage = tape->active_stage;
- tape->active_stage = NULL;
- tape->active_data_rq = NULL;
- tape->nr_pending_stages--;
- if (rq->cmd[0] & REQ_IDETAPE_WRITE) {
- if (error) {
- set_bit(IDETAPE_FLAG_PIPELINE_ERR,
- &tape->flags);
- if (error == IDETAPE_ERROR_EOD)
- idetape_abort_pipeline(drive,
- active_stage);
- }
- } else if (rq->cmd[0] & REQ_IDETAPE_READ) {
- if (error == IDETAPE_ERROR_EOD) {
- set_bit(IDETAPE_FLAG_PIPELINE_ERR,
- &tape->flags);
- idetape_abort_pipeline(drive, active_stage);
- }
- }
- if (tape->next_stage != NULL) {
- idetape_activate_next_stage(drive);
-
- /* Insert the next request into the request queue. */
- (void)ide_do_drive_cmd(drive, tape->active_data_rq,
- ide_end);
- } else if (!error) {
- /*
- * This is a part of the feedback loop which tries to
- * find the optimum number of stages. We are starting
- * from a minimum maximum number of stages, and if we
- * sense that the pipeline is empty, we try to increase
- * it, until we reach the user compile time memory
- * limit.
- */
- int i = (tape->max_pipeline - tape->min_pipeline) / 10;
-
- tape->max_stages += max(i, 1);
- tape->max_stages = max(tape->max_stages,
- tape->min_pipeline);
- tape->max_stages = min(tape->max_stages,
- tape->max_pipeline);
- }
- }
ide_end_drive_cmd(drive, 0, 0);
- if (tape->active_data_rq == NULL)
- clear_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags);
+ clear_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags);
spin_unlock_irqrestore(&tape->lock, flags);
return 0;
}