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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Message-ID: <20170427164014.422a124c@gmail.com>
Date:   Thu, 27 Apr 2017 16:40:14 +0200
From:   Ralph Sennhauser <ralph.sennhauser@...il.com>
To:     Sricharan R <sricharan@...eaurora.org>
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

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.

Regards
Ralph