Failed to IDENTIFY SATA harddrive on sata_sil24

Hi,

Does anyone familiar with SiliconImage 3132 SATA controller?
I'm running siliconimage 3132 as e-Sata controller on my ARM-based board.
My kernel version is 2.6.18.6. I built libata and sata_sil24 as kernel module.
After I insert libata and sata_sil24 module, and plug external
harddrive via e-Sata.
sata_sil24.c can detect phy changed, and found a ATA device.
And then it will issue IDENTIFY(0xec) command but time out to get
command completion.
And Sil3132 seems dead or enter into an unknown state.Since it will
not issue any interrupts even I remove and replug the e-Sata cable.
Does anyone have experienced this situation, or any suggestion.
Thanks.

bthomastsai