Re: regression: ide-floppy doesn't work with IOMEGA IDE ZIP drive

[Tejun Heo <htejun@gmail.com>]

Bartlomiej Zolnierkiewicz wrote:
>> My drive is a slave on bus, where master is a modern Seagate ST3160812A.
>>
>> On my system I see two regressions:
>> - One between year 2002 kernels and SuSE Linux 10.0:
>>   Delay with "packet command initiated yet DRQ isn't asserted" before
>>   first read access, then the read will succeed.
>>   I did not yet reproduce this regression just now on my hardware.
>> - Second between SuSE 10.1 and 10.2:
>>   Delay with "packet command initiated yet DRQ isn't asserted" before
>>   any attempt to access, then it will fail.
>>   This regression is reproducible just now on my hardware, but still may
>>   be caused by hardware problems raised by a slightly different
>>   initialization order.
> 
> It is reproduceable, SuSE 10.1 kernel is "good" and SuSE 10.2 is "bad".
> So even if this is caused by some hardware problems or different
> initialization order git-bisect on 2.6.16-2.6.20 should tell us what
> change caused the problem.
> 
> PS Tejun, I praise efforts to make ATA floppy drives work with libata
> but this is IMO a _future_ work (won't help et all for existing
> systems/distributions) and we need to have ide-floppy fixed _now_.

Yeap, agreed but I think getting more info on the libata HSM violation
can help diagnosing ide problem too.  Anyways, Stanislav, can you bisect
as Bartlomiej requested?

-- 
tejun