RE: ATA failure regression

[Shah, Nehal-bakulchandra]

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.


Thanks

Nehal
-----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.
> (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

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