Re: SIL_QUIRK_MOD15WRITE workaround problem on 2.6.14

[Tejun Heo <htejun@gmail.com>]

Jeff Garzik wrote:
> Tejun Heo wrote:
>
> > Ethan confirmed that it's 1095:3114.  Arghhh....  Maybe we should keep 
> > m15w quirk for 3114's for the time being?  Better be slow than hang. 
> > Whatever bug the m15w quirk was hiding.
>
> A generic 'slow_down_io' module option is reasonable.
>
> It is not appropriate to apply mod15write quirk to hardware that isn't 
> affected by the chip bug.
> A better solution is to write a 311x-specific interrupt handler.
Hello, Jeff.  Hello, Carlos.

I bought a sii3114 controller yesterday and took out my ST3120026AS for 
testing.  The drive times out during a WRITE_EXT, and locks up.
* The ST3120026AS works perfectly on a VIA controller.
* The sii3114 controller works perfectly with Maxtor 6B080M0 drives.

I don't know.  It acts and smells like m15w problem.  What are the odds 
of having the same symptom on the same combination?
Also, I've asked one of my friends who has a sii3512 onboard controller 
and an affected seagate drive to test.  The harddisk works on 2.6.13 
with the quirk, but it freezes on 2.6.14.  m15w affected seagate drives 
does _NOT_ work on 3512 and 3114 on 2.6.14, be it m15w or something else.
--
tejun
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