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From: Borislav Petkov <petkovbb@googlemail.com>
To: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 03/24] ide-tape: remove pipeline-specific code from idetape_add_chrdev_read_request
Date: Sun, 2 Mar 2008 22:28:35 +0100 [thread overview]
Message-ID: <20080302212835.GE4836@gollum.tnic> (raw)
In-Reply-To: <200803021936.12741.bzolnier@gmail.com>
On Sun, Mar 02, 2008 at 07:36:12PM +0100, Bartlomiej Zolnierkiewicz wrote:
> On Saturday 01 March 2008, Borislav Petkov wrote:
> > 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@gmail.com>
> > ---
> > 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);
>
> Can it be simply removed? Why?
Bugger, actually this one _has_ to stay since it inits the tape->merge_stage
buffer.
> > - 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);
>
> Looking at the driver code tape->first_stage is not always NULL,
> seems like ide_tape_add_stage_tail() should vanish first?
At this moment there are no more stages in the pipeline besides only
tape->merge_stage. But this boils down to whether we want to keep the driver
functional in intermittent stages of the removal, as i pointed out before...
--
Regards/Gruß,
Boris.
next prev parent reply other threads:[~2008-03-02 21:29 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-01 8:58 [PATCH 00/24] ide-tape: remove pipelined mode operation Borislav Petkov
2008-03-01 8:58 ` [PATCH 01/24] ide-tape: remove idetape_pipeline_active() Borislav Petkov
2008-03-02 18:21 ` Bartlomiej Zolnierkiewicz
2008-03-01 8:58 ` [PATCH 02/24] ide-tape: remove pipeline-specific code from idetape_add_chrdev_write_request Borislav Petkov
2008-03-02 18:33 ` Bartlomiej Zolnierkiewicz
2008-03-02 21:19 ` Borislav Petkov
2008-03-02 23:16 ` Bartlomiej Zolnierkiewicz
2008-03-03 6:43 ` Borislav Petkov
2008-03-03 22:32 ` Bartlomiej Zolnierkiewicz
2008-03-01 8:58 ` [PATCH 03/24] ide-tape: remove pipeline-specific code from idetape_add_chrdev_read_request Borislav Petkov
2008-03-02 18:36 ` Bartlomiej Zolnierkiewicz
2008-03-02 21:28 ` Borislav Petkov [this message]
2008-03-01 8:58 ` [PATCH 04/24] ide-tape: remove pipeline-specific code from idetape_chrdev_write Borislav Petkov
2008-03-02 18:41 ` Bartlomiej Zolnierkiewicz
2008-03-02 21:31 ` Borislav Petkov
2008-03-02 23:17 ` Bartlomiej Zolnierkiewicz
2008-03-01 8:58 ` [PATCH 05/24] ide-tape: cleanup pipeline-specific code from idetape_init_read Borislav Petkov
2008-03-02 18:48 ` Bartlomiej Zolnierkiewicz
2008-03-01 8:58 ` [PATCH 06/24] ide-tape: remove unused stage-parameter from idetape_copy_stage_to_user Borislav Petkov
2008-03-02 19:15 ` Bartlomiej Zolnierkiewicz
2008-03-01 8:58 ` [PATCH 07/24] ide-tape: remove pipeline-specific code bits from idetape_chrdev_read Borislav Petkov
2008-03-01 8:58 ` [PATCH 08/24] ide-tape: remove pipeline-specific code from idetape_space_over_filemarks Borislav Petkov
2008-03-01 8:58 ` [PATCH 09/24] ide-tape: remove pipeline-specific code from idetape_mtioctop Borislav Petkov
2008-03-01 8:58 ` [RFCPATCH 10/24] ide-tape: remove pipeline-specific code from idetape_chrdev_ioctl Borislav Petkov
2008-03-01 8:58 ` [PATCH 11/24] ide-tape: remove pipeline-specific code from idetape_blkdev_ioctl Borislav Petkov
2008-03-01 8:58 ` [PATCH 12/24] ide-tape: remove idetape_empty_write_pipeline Borislav Petkov
2008-03-01 8:58 ` [PATCH 13/24] ide-tape: remove pipeline-specific code from idetape_chrdev_release Borislav Petkov
2008-03-01 8:58 ` [PATCH 14/24] ide-tape: remove __idetape_discard_read_pipeline Borislav Petkov
2008-03-01 8:58 ` [PATCH 15/24] ide-tape: remove pipeline-specific code from idetape_end_request Borislav Petkov
2008-03-01 8:58 ` [PATCH 16/24] ide-tape: remove idetape_calculate_speeds Borislav Petkov
2008-03-01 8:58 ` [PATCH 17/24] ide-tape: remove pipeline-specific code from idetape_chrdev_open Borislav Petkov
2008-03-01 8:58 ` [PATCH 18/24] ide-tape: remove pipeline-specific code from idetape_setup Borislav Petkov
2008-03-01 8:58 ` [PATCH 19/24] ide-tape: remove pipelined mode parameters Borislav Petkov
2008-03-01 8:58 ` [PATCH 20/24] ide-tape: remove pipelined mode tape control flags Borislav Petkov
2008-03-01 8:58 ` [PATCH 21/24] ide-tape: remove pipeline-specific members from struct ide_tape_obj Borislav Petkov
2008-03-01 8:58 ` [PATCH 22/24] ide-tape: remove misc references to pipelined operation in the comments Borislav Petkov
2008-03-01 8:58 ` [PATCH 23/24] ide-tape: remove pipelined mode description from Documentation/ide/ide-tape.txt Borislav Petkov
2008-03-01 8:58 ` [PATCH 24/24] ide-tape: remove comments markup " Borislav Petkov
2008-03-01 9:55 ` [PATCH 00/24] ide-tape: remove pipelined mode operation Jens Axboe
2008-03-01 15:45 ` Borislav Petkov
2008-03-01 18:36 ` Jens Axboe
2008-03-01 10:20 ` Adrian Bunk
2008-03-01 15:37 ` Borislav Petkov
2008-03-22 16:09 ` Bartlomiej Zolnierkiewicz
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