LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: petkovbb@gmail.com
Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 04/24] ide-tape: remove pipeline-specific code from idetape_chrdev_write
Date: Mon, 3 Mar 2008 00:17:19 +0100	[thread overview]
Message-ID: <200803030017.19503.bzolnier@gmail.com> (raw)
In-Reply-To: <20080302213126.GF4836@gollum.tnic>

On Sunday 02 March 2008, Borislav Petkov wrote:
> On Sun, Mar 02, 2008 at 07:41:28PM +0100, Bartlomiej Zolnierkiewicz wrote:
> > On Saturday 01 March 2008, Borislav Petkov wrote:
> > > Also, remove unused stage-parameter from idetape_copy_stage_from_user()
> > 
> > Changes like this one are the best to put into separate patches
> > at the very beginning of the patch series.
> > 
> > > Signed-off-by: Borislav Petkov <petkovbb@gmail.com>
> > > ---
> > >  drivers/ide/ide-tape.c |   15 ++++-----------
> > >  1 files changed, 4 insertions(+), 11 deletions(-)
> > > 
> > > diff --git a/drivers/ide/ide-tape.c b/drivers/ide/ide-tape.c
> > > index e919d41..4a064c1 100644
> > > --- a/drivers/ide/ide-tape.c
> > > +++ b/drivers/ide/ide-tape.c
> > > @@ -1700,7 +1700,7 @@ static idetape_stage_t *idetape_kmalloc_stage(idetape_tape_t *tape)
> > >  }
> > >  
> > >  static int idetape_copy_stage_from_user(idetape_tape_t *tape,
> > > -		idetape_stage_t *stage, const char __user *buf, int n)
> > > +					const char __user *buf, int n)
> > >  {
> > >  	struct idetape_bh *bh = tape->bh;
> > >  	int count;
> > > @@ -2696,8 +2696,6 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
> > >  
> > >  	/* Initialize write operation */
> > >  	if (tape->chrdev_dir != IDETAPE_DIR_WRITE) {
> > > -		if (tape->chrdev_dir == IDETAPE_DIR_READ)
> > > -			idetape_discard_read_pipeline(drive, 1);
> > 
> > Why this is OK thing to do?
> > 
> > Are you sure that there are no hidden side-effects?
> > 
> > >  		if (tape->merge_stage || tape->merge_stage_size) {
> > >  			printk(KERN_ERR "ide-tape: merge_stage_size "
> > >  				"should be 0 now\n");
> > > @@ -2729,8 +2727,6 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
> > >  	}
> > >  	if (count == 0)
> > >  		return (0);
> > > -	if (tape->restart_speed_control_req)
> > > -		idetape_restart_speed_control(drive);
> > 
> > ditto
> > 
> > tape->restart_speed_control_req can still be non-zero.
> 
> Same as above: my main focus was ease of review and not keeping pipelining
> functional at all times.

The review is _not_ easied by introducing new & not completely defined
states of the operation...

[ i.e. the speed control feedback loop should be either left alone or
  removed altogether in some pre/post-patch instead of subtle changes
  in the intermediate patches. ]

Could please recast the patches?

Thanks,
Bart

  reply	other threads:[~2008-03-02 23:04 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
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 [this message]
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=200803030017.19503.bzolnier@gmail.com \
    --to=bzolnier@gmail.com \
    --cc=linux-ide@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=petkovbb@gmail.com \
    --subject='Re: [PATCH 04/24] ide-tape: remove pipeline-specific code from idetape_chrdev_write' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).