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Subject[PATCH 05/24] ide-tape: cleanup pipeline-specific code from idetape_init_read
Date
From
Also, remove idetape_kmalloc_stage() and idetape_add_stage_tail() since they've
become unused, as a result.

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
---
drivers/ide/ide-tape.c | 73 +++--------------------------------------------
1 files changed, 5 insertions(+), 68 deletions(-)
diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
index 4a064c1..6bca29b 100644
--- a/drivers/ide/ide-tape.c
+++ b/drivers/ide/ide-tape.c
@@ -1684,21 +1684,6 @@ abort:
return NULL;
}

-static idetape_stage_t *idetape_kmalloc_stage(idetape_tape_t *tape)
-{
- idetape_stage_t *cache_stage = tape->cache_stage;
-
- debug_log(DBG_PROCS, "Enter %s\n", __func__);
-
- if (tape->nr_stages >= tape->max_stages)
- return NULL;
- if (cache_stage != NULL) {
- tape->cache_stage = NULL;
- return cache_stage;
- }
- return __idetape_kmalloc_stage(tape, 0, 0);
-}
-
static int idetape_copy_stage_from_user(idetape_tape_t *tape,
const char __user *buf, int n)
{
@@ -1776,30 +1761,8 @@ static void idetape_init_merge_stage(idetape_tape_t *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)
-{
- idetape_tape_t *tape = drive->driver_data;
- unsigned long flags;
-
- debug_log(DBG_PROCS, "Enter %s\n", __func__);
-
- spin_lock_irqsave(&tape->lock, flags);
- stage->next = NULL;
- if (tape->last_stage != NULL)
- tape->last_stage->next = stage;
- else
- tape->first_stage = stage;
- tape->next_stage = stage;
- tape->last_stage = stage;
- if (tape->next_stage == NULL)
- tape->next_stage = tape->last_stage;
- tape->nr_stages++;
- tape->nr_pending_stages++;
- spin_unlock_irqrestore(&tape->lock, flags);
-}
-
-/* Install a completion in a pending request and sleep until it is serviced. The
+/*
+ * Install a completion in a pending request and sleep until it is serviced. The
* caller should ensure that the request will not be serviced before we install
* the completion (usually by disabling interrupts).
*/
@@ -2318,17 +2281,12 @@ static void idetape_restart_speed_control(ide_drive_t *drive)
static int idetape_init_read(ide_drive_t *drive, int max_stages)
{
idetape_tape_t *tape = drive->driver_data;
- idetape_stage_t *new_stage;
struct request rq;
int bytes_read;
u16 blocks = *(u16 *)&tape->caps[12];

/* Initialize read operation */
if (tape->chrdev_dir != IDETAPE_DIR_READ) {
- if (tape->chrdev_dir == IDETAPE_DIR_WRITE) {
- idetape_empty_write_pipeline(drive);
- idetape_flush_tape_buffers(drive);
- }
if (tape->merge_stage || tape->merge_stage_size) {
printk(KERN_ERR "ide-tape: merge_stage_size should be"
" 0 now\n");
@@ -2347,8 +2305,8 @@ static int idetape_init_read(ide_drive_t *drive, int max_stages)
*/
if (drive->dsc_overlap) {
bytes_read = idetape_queue_rw_tail(drive,
- REQ_IDETAPE_READ, 0,
- tape->merge_stage->bh);
+ REQ_IDETAPE_READ, 0,
+ tape->merge_stage->bh);
if (bytes_read < 0) {
__idetape_kfree_stage(tape->merge_stage);
tape->merge_stage = NULL;
@@ -2357,32 +2315,11 @@ static int idetape_init_read(ide_drive_t *drive, int max_stages)
}
}
}
- if (tape->restart_speed_control_req)
- idetape_restart_speed_control(drive);
idetape_init_rq(&rq, REQ_IDETAPE_READ);
rq.sector = tape->first_frame;
rq.nr_sectors = blocks;
rq.current_nr_sectors = blocks;
- if (!test_bit(IDETAPE_FLAG_PIPELINE_ERR, &tape->flags) &&
- tape->nr_stages < max_stages) {
- new_stage = idetape_kmalloc_stage(tape);
- while (new_stage != NULL) {
- new_stage->rq = rq;
- idetape_add_stage_tail(drive, new_stage);
- if (tape->nr_stages >= max_stages)
- break;
- new_stage = idetape_kmalloc_stage(tape);
- }
- }
- if (!test_bit(IDETAPE_FLAG_PIPELINE_ACTIVE, &tape->flags)) {
- if (tape->nr_pending_stages >= 3 * max_stages / 4) {
- tape->measure_insert_time = 1;
- tape->insert_time = jiffies;
- tape->insert_size = 0;
- tape->insert_speed = 0;
- idetape_plug_pipeline(drive);
- }
- }
+
return 0;
}

--
1.5.4.1


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