RE: ATA failure regression

From: Shah, Nehal-bakulchandra
Date: Mon Sep 26 2016 - 06:30:04 EST

Hi Bharat

Thanks for the reply. I have observed following thing

If IOMMU is enabled in BIOS and I use following option
FCH SATA Debug Options --> Unused SATA Port Auto Shut Down Disabled. Issue is not happening. I have attached dmesg and lspci output with this option

Also I have attached lspci log with IOMMU disabled.

When issue is happening I am not able to take lspci logs as it stops in initramfs itself. I will try to get.


-----Original Message-----
From: Bharat Kumar Gogada [mailto:bharat.kumar.gogada@xxxxxxxxxx]
Sent: Friday, September 23, 2016 3:40 PM
To: Shah, Nehal-bakulchandra <Nehal-bakulchandra.Shah@xxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx; holler@xxxxxxxxxxxxx; tj@xxxxxxxxxx; linux-ide@xxxxxxxxxxxxxxx
Cc: Deucher, Alexander <Alexander.Deucher@xxxxxxx>
Subject: RE: ATA failure regression

> 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.
> ( or
> 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.


Attachment: lspci_unused_SATA_PORT
Description: lspci_unused_SATA_PORT

Attachment: lspci_IOMMU_Disable
Description: lspci_IOMMU_Disable

Attachment: dmesg_lspci_unused_SATA_PORT
Description: dmesg_lspci_unused_SATA_PORT