netdev - Re: usb/net/hso: WARNING: ungligned urb->setup

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Message-ID: <20170228180700.3fxpimfysnhm6uis@tarshish>
Date:   Tue, 28 Feb 2017 20:07:00 +0200
From:   Baruch Siach <baruch@...s.co.il>
To:     Stefan Wahren <stefan.wahren@...e.com>
Cc:     linux-usb@...r.kernel.org, John Youn <johnyoun@...opsys.com>,
        netdev@...r.kernel.org, Olivier Sobrie <olivier@...rie.be>,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: usb/net/hso: WARNING: ungligned urb->setup_dma

Hi Stefan,

On Tue, Feb 28, 2017 at 05:21:18PM +0100, Stefan Wahren wrote:
> Am 28.02.2017 um 13:01 schrieb Baruch Siach:
> > On Tue, Feb 28, 2017 at 10:28:10AM +0200, Baruch Siach wrote:
> > > I'm hitting this warning consistently on my Raspberry Pi 3 running 
> > > kernel
> > > v4.10.1 with some unrelated device tree changes, and a debug print (below).
> > > The device identifies as "GlobeTrotter HSDPA Modem", VID: 0af0, PID: 6971.
> > > The warning triggers consistently on first write access to /dev/ttyHS0 that
> > > ModemManager attempts. The first line in the log is my debug print.
> > I tested the same hardware successfully on an i.MX6 CuBox-i (ARM32) using the
> > same kernel version (4.10.1), and on an x86_64 PC (4.9). So this seems to be
> > platform specific. I don't have any other ARM64 machine at the moment, though.
> 
> those platforms usually doesn't use the dwc2 USB host controller. So it
> should be tested with another dwc2 platform.

The code that initializes setup_dma is not under drivers/usb/dwc2/. Though the 
problem looks like memory corruption, so its cause might be anywhere.

> Is the issue reproducible with other USB devices like keyboards?

Other USB devices, including a different cellular USB dongle, do not exhibit 
the same problem.

> Are you using arm64 defconfig?

I'm using that attached arm64 defconfig.

> Are you able to bisect this issue?

I don't have any previously working point.

Thanks,
baruch

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
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View attachment "defconfig" of type "text/plain" (6436 bytes)