linux-kernel - Re: [REGRESSION next-20170426] Commit 09515ef5ddad ("of/acpi: Configure dma operations at probe time for platform/amba/pci bus devices") causes oops in mvneta

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Date:   Fri, 28 Apr 2017 11:13:33 +0530
From:   Sricharan R <sricharan@...eaurora.org>
To:     Ralph Sennhauser <ralph.sennhauser@...il.com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Joerg Roedel <jroedel@...e.de>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        netdev@...r.kernel.org
Subject: Re: [REGRESSION next-20170426] Commit 09515ef5ddad ("of/acpi:
 Configure dma operations at probe time for platform/amba/pci bus devices")
 causes oops in mvneta

Hi Ralph,

On 4/27/2017 8:10 PM, Ralph Sennhauser wrote:
> On Thu, 27 Apr 2017 19:05:09 +0530
> Sricharan R <sricharan@...eaurora.org> wrote:
> 
>> Hi,
>>
>> On 4/26/2017 9:45 PM, Ralph Sennhauser wrote:
>>> Hi Sricharan R,
>>>
>>> Commit 09515ef5ddad ("of/acpi: Configure dma operations at probe
>>> time for platform/amba/pci bus devices") causes a kernel panic as
>>> in the log below on an armada-385. Reverting the commit fixes the
>>> issue.
>>>
>>> Regards
>>> Ralph  
>>
>> Somehow not getting a obvious clue on whats going wrong with the logs
>> below. From the log and looking in to dts, the drivers seems to the
>> one for "marvell,armada-370-neta".
> 
> Correct.
> 
>> Issue looks the data from the dma
>> has gone bad and subsequently referring the wrong data has resulted
>> in the crash. Looks like the dma_masks is the one going wrong.
>> Can i get some logs from mvneta_probe, about dev->dma_mask,
>> dev->coherent_dma_mask and dev->dma_ops with and without the patch
>> to see whats the difference ?
> 
> Not sure I understood what exactly you are after. Might be faster to
> just send me a patch with all debug print statements you like to see.
> 

Attached the patch with debug prints.

Regards,
 Sricharan

-- 
"QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

View attachment "0001-Debug-prints.patch" of type "text/plain" (1113 bytes)