Mao Rui wrote:
> I tried to nail down when the problem was introduced. I compiled some
> official kernel release. Here is the result.
> 2.6.17.14   IDE -- Failed   SATA -- passed
> 2.6.18   IDE -- Failed   SATA -- failed
> 2.6.18.8   IDE -- Failed   SATA -- failed
> 2.6.24-rc7-git6  IDE -- passed   SATA DOM -- failed
> linux-2.6.24-rc8-git1   IDE -- passed    SATA -- failed
> All IDE failed reason is xfermode error, and all SATA failure is IDENTIFY
> error.
> 
> As you can find out, the failure of SATA DOM was introduced from kernel
> 2.6.18.
> 
> I'm not good at low level driver programming, so I cannot find out the root
> cause by myself. But if Alan or someone else needs more info or wants to
> test the patch, I'm glad to do it in my platform.

Does the attached patch make any difference?

-- 
tejun