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SubjectRe: [patch 3/6] ide: always kill the whole request on error
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On Wednesday 24 June 2009 01:19:04 David Miller wrote:
> From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
> Date: Tue, 23 Jun 2009 23:27:27 +0200
>
> > From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
> > Subject: [PATCH] ide: always kill the whole request on error
> >
> > * Use blk_rq_bytes() instead of obsolete ide_rq_bytes() in ide_kill_rq()
> > and ide_floppy_do_request() for failed requests.
> > [ bugfix part ]
> >
> > * Use blk_rq_bytes() instead of obsolete ide_rq_bytes() in ide_do_devset()
> > and ide_complete_drive_reset(). Then remove ide_rq_bytes().
> > [ cleanup part ]
> >
> > Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
> > ---
> > 'cleanup part' tested, limited testing with 'bugfix part'
> > (using simulated failures of disk fs requests)
>
> Considering this alongsize patch #2, it even more begs the
> question as to why special requests on floppy and tape were
> handled differently. And that 'error <= 0' test, strange.

TBH I fail to see how it relates to changes present in _this_ patch
as no change in _this_ patch affects special tape/floppy requests..

> I have a hard time believing all of these differences are there for no
> reason at all. :-)

Lets keep personal believes aside in the technical discussions. ;)

> > drivers/ide/ide-devsets.c | 2 +-
> > drivers/ide/ide-eh.c | 2 +-
> > drivers/ide/ide-floppy.c | 2 +-
> > drivers/ide/ide-io.c | 14 ++------------
> > include/linux/ide.h | 1 -
> > 5 files changed, 5 insertions(+), 16 deletions(-)
> >
> > Index: b/drivers/ide/ide-devsets.c
> > ===================================================================
> > --- a/drivers/ide/ide-devsets.c
> > +++ b/drivers/ide/ide-devsets.c
> > @@ -183,6 +183,6 @@ ide_startstop_t ide_do_devset(ide_drive_
> > err = setfunc(drive, *(int *)&rq->cmd[1]);
> > if (err)
> > rq->errors = err;
> > - ide_complete_rq(drive, err, ide_rq_bytes(rq));
> > + ide_complete_rq(drive, err, blk_rq_bytes(rq));
> > return ide_stopped;
> > }
> > Index: b/drivers/ide/ide-eh.c
> > ===================================================================
> > --- a/drivers/ide/ide-eh.c
> > +++ b/drivers/ide/ide-eh.c
> > @@ -149,7 +149,7 @@ static inline void ide_complete_drive_re
> > if (rq && blk_special_request(rq) && rq->cmd[0] == REQ_DRIVE_RESET) {
> > if (err <= 0 && rq->errors == 0)
> > rq->errors = -EIO;
> > - ide_complete_rq(drive, err ? err : 0, ide_rq_bytes(rq));
> > + ide_complete_rq(drive, err ? err : 0, blk_rq_bytes(rq));
> > }
> > }
> >
> > Index: b/drivers/ide/ide-floppy.c
> > ===================================================================
> > --- a/drivers/ide/ide-floppy.c
> > +++ b/drivers/ide/ide-floppy.c
> > @@ -293,7 +293,7 @@ out_end:
> > drive->failed_pc = NULL;
> > if (blk_fs_request(rq) == 0 && rq->errors == 0)
> > rq->errors = -EIO;
> > - ide_complete_rq(drive, -EIO, ide_rq_bytes(rq));
> > + ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
> > return ide_stopped;
> > }
> >
> > Index: b/drivers/ide/ide-io.c
> > ===================================================================
> > --- a/drivers/ide/ide-io.c
> > +++ b/drivers/ide/ide-io.c
> > @@ -112,16 +112,6 @@ void ide_complete_cmd(ide_drive_t *drive
> > }
> > }
> >
> > -/* obsolete, blk_rq_bytes() should be used instead */
> > -unsigned int ide_rq_bytes(struct request *rq)
> > -{
> > - if (blk_pc_request(rq))
> > - return blk_rq_bytes(rq);
> > - else
> > - return blk_rq_cur_sectors(rq) << 9;
> > -}
> > -EXPORT_SYMBOL_GPL(ide_rq_bytes);
> > -
> > int ide_complete_rq(ide_drive_t *drive, int error, unsigned int nr_bytes)
> > {
> > ide_hwif_t *hwif = drive->hwif;
> > @@ -152,14 +142,14 @@ void ide_kill_rq(ide_drive_t *drive, str
> >
> > if ((media == ide_floppy || media == ide_tape) && drv_req) {
> > rq->errors = 0;
> > - ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
> > } else {
> > if (media == ide_tape)
> > rq->errors = IDE_DRV_ERROR_GENERAL;
> > else if (blk_fs_request(rq) == 0 && rq->errors == 0)
> > rq->errors = -EIO;
> > - ide_complete_rq(drive, -EIO, ide_rq_bytes(rq));
> > }
> > +
> > + ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
> > }
> >
> > static void ide_tf_set_specify_cmd(ide_drive_t *drive, struct ide_taskfile *tf)
> > Index: b/include/linux/ide.h
> > ===================================================================
> > --- a/include/linux/ide.h
> > +++ b/include/linux/ide.h
> > @@ -1062,7 +1062,6 @@ int generic_ide_ioctl(ide_drive_t *, str
> > extern int ide_vlb_clk;
> > extern int ide_pci_clk;
> >
> > -unsigned int ide_rq_bytes(struct request *);
> > int ide_end_rq(ide_drive_t *, struct request *, int, unsigned int);
> > void ide_kill_rq(ide_drive_t *, struct request *);


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