linux-kernel - RE: ATA failure regression

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Message-ID: <MWHPR12MB177486F96C515BCAEADC7D70A0CF0@MWHPR12MB1774.namprd12.prod.outlook.com>
Date:   Wed, 28 Sep 2016 05:45:08 +0000
From:   "Shah, Nehal-bakulchandra" <Nehal-bakulchandra.Shah@....com>
To:     Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
CC:     "Deucher, Alexander" <Alexander.Deucher@....com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "holler@...oftware.de" <holler@...oftware.de>,
        "tj@...nel.org" <tj@...nel.org>,
        "linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: ATA failure regression

Hi 

Can someone please help me to debug this issue?

Regards
Nehal

-----Original Message-----
From: Shah, Nehal-bakulchandra 
Sent: Monday, September 26, 2016 3:45 PM
To: 'Bharat Kumar Gogada' <bharat.kumar.gogada@...inx.com>
Cc: Deucher, Alexander <Alexander.Deucher@....com>; linux-pci@...r.kernel.org; holler@...oftware.de; tj@...nel.org; linux-ide@...r.kernel.org; linux-kernel@...r.kernel.org
Subject: RE: ATA failure regression

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@...inx.com]
Sent: Friday, September 23, 2016 3:40 PM
To: Shah, Nehal-bakulchandra <Nehal-bakulchandra.Shah@....com>; linux-kernel@...r.kernel.org; linux-pci@...r.kernel.org; holler@...oftware.de; tj@...nel.org; linux-ide@...r.kernel.org
Cc: Deucher, Alexander <Alexander.Deucher@....com>
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