Hi All,

Resending this wider audience

Currently I am working on AMD future platform.  I am hitting the same bug of
ATA Failure Regression reported in past.
(https://patchwork.kernel.org/patch/6875661/) or
http://lkml.iu.edu/hypermail/linux/kernel/1507.3/01961.html

I am newbie to this and because of this Ubuntu  16.04 is not booting. If disable
IOMMU and MSI obviously it works but that is not solution. Even when I bisected
it boiled to same place which was mentioned in past discussion.

So here when you are disabling MSI, it is working with legacy interrupts or MSI-X.
Can you post the end sata device lscpi -xxx -vvv content. 

Bharat