Re: [PATCH] libata error handling fixes (ATAPI)

From: Jens Axboe
Date: Wed Nov 16 2005 - 15:01:23 EST

On Wed, Nov 16 2005, Bartlomiej Zolnierkiewicz wrote:
> > > which of course didn't work, so it was changed to the above which then
> > > broke the assumption of what type of requests we expect to see in
> > > ide_softirq_done(). We can't generically handle this case, so it's
> > > probably best to just add this logic to __ide_end_request() - it's just
> > > another case for _not_ using the blk_complete_request() path, just like
> > > the partial case.
> >
> > Sounds better but I honestly think that you simply cannot obtain
> > reliable nr_sectors to complete for FS/PC requests just from the
> > request type. Two examples are: failed disk flush requests and
> > cd noretry requests (both are of FS type).
> first example is bad :-)

Both your examples are wrong - a flush request is non-fs/pc, and noretry
requests doesn't impact the type of the request at from this POV.

> > IMO the best way to fix it is to actually move more (not less!) of
> > the logic from driver->end_request() paths to ide_softirq_done().
> Your latest patch is also a good way to fix it
> (now the only thing left is rq->errors/rq->retries discussed earlier).

Yeah, that is still pending... I updated the patch series so it's a
clean 1-2-3-4 step series now, there instead of this little additions.

Jens Axboe

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