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ide-tape: remove misc references to pipelined operation in the comments 

Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Borislav Petkov 2008-04-27 15:38:28 +02:00 committed by Bartlomiej Zolnierkiewicz
parent c0674bf3b6
commit 5bd50dc6aa
1 changed files with 3 additions and 19 deletions
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22
drivers/ide/ide-tape.c
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@ -265,9 +265,7 @@ typedef struct ide_tape_obj {
* While polling for DSC we use postponed_rq to postpone the current * While polling for DSC we use postponed_rq to postpone the current
* request so that ide.c will be able to service pending requests on the * request so that ide.c will be able to service pending requests on the
* other device. Note that at most we will have only one DSC (usually * other device. Note that at most we will have only one DSC (usually
* data transfer) request in the device request queue. Additional * data transfer) request in the device request queue.
* requests can be queued in our internal pipeline, but they will be
* visible to ide.c only one at a time.
*/ */
struct request *postponed_rq; struct request *postponed_rq;
/* The time in which we started polling for DSC */ /* The time in which we started polling for DSC */
@ -608,10 +606,6 @@ static void __idetape_kfree_stage(idetape_stage_t *stage)
kfree(stage); kfree(stage);
} }
/*
* Finish servicing a request and insert a pending pipeline request into the
* main device queue.
*/
static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects) static int idetape_end_request(ide_drive_t *drive, int uptodate, int nr_sects)
{ {
struct request *rq = HWGROUP(drive)->rq; struct request *rq = HWGROUP(drive)->rq;
@ -1295,8 +1289,6 @@ out:
return idetape_issue_pc(drive, pc); return idetape_issue_pc(drive, pc);
} }
/* Pipeline related functions */
/* /*
* The function below uses __get_free_page to allocate a pipeline stage, along * The function below uses __get_free_page to allocate a pipeline stage, along
* with all the necessary small buffers which together make a buffer of size * with all the necessary small buffers which together make a buffer of size
@ -1305,9 +1297,6 @@ out:
* *
* It returns a pointer to the new allocated stage, or NULL if we can't (or * It returns a pointer to the new allocated stage, or NULL if we can't (or
* don't want to) allocate a stage. * don't want to) allocate a stage.
*
* Pipeline stages are optional and are used to increase performance. If we
* can't allocate them, we'll manage without them.
*/ */
static idetape_stage_t *__idetape_kmalloc_stage(idetape_tape_t *tape, int full, static idetape_stage_t *__idetape_kmalloc_stage(idetape_tape_t *tape, int full,
int clear) int clear)
@ -1875,10 +1864,7 @@ static int idetape_init_read(ide_drive_t *drive)
return 0; return 0;
} }
/* /* called from idetape_chrdev_read() to service a chrdev read request. */
* Called from idetape_chrdev_read() to service a character device read request
* and add read-ahead requests to our pipeline.
*/
static int idetape_add_chrdev_read_request(ide_drive_t *drive, int blocks) static int idetape_add_chrdev_read_request(ide_drive_t *drive, int blocks)
{ {
idetape_tape_t *tape = drive->driver_data; idetape_tape_t *tape = drive->driver_data;
@ -2216,8 +2202,7 @@ static int idetape_write_filemark(ide_drive_t *drive)
* *
* Note: MTBSF and MTBSFM are not supported when the tape doesn't support * Note: MTBSF and MTBSFM are not supported when the tape doesn't support
* spacing over filemarks in the reverse direction. In this case, MTFSFM is also * spacing over filemarks in the reverse direction. In this case, MTFSFM is also
* usually not supported (it is supported in the rare case in which we crossed * usually not supported.
* the filemark during our read-ahead pipelined operation mode).
* *
* The following commands are currently not supported: * The following commands are currently not supported:
* *
@ -2233,7 +2218,6 @@ static int idetape_mtioctop(ide_drive_t *drive, short mt_op, int mt_count)
debug_log(DBG_ERR, "Handling MTIOCTOP ioctl: mt_op=%d, mt_count=%d\n", debug_log(DBG_ERR, "Handling MTIOCTOP ioctl: mt_op=%d, mt_count=%d\n",
mt_op, mt_count); mt_op, mt_count);
/* Commands which need our pipelined read-ahead stages. */
switch (mt_op) { switch (mt_op) {
case MTFSF: case MTFSF:
case MTFSFM: case MTFSFM: