Hi Baruch,

Baruch Siach [off-list ref] hat am 28. Februar 2017 um 19:07 geschrieben:


Hi Stefan,

On Tue, Feb 28, 2017 at 05:21:18PM +0100, Stefan Wahren wrote:

quoted

Am 28.02.2017 um 13:01 schrieb Baruch Siach:

quoted

On Tue, Feb 28, 2017 at 10:28:10AM +0200, Baruch Siach wrote:

quoted

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.

only a suspicion, but could you please try this patch [1]?

[1] - https://patchwork.kernel.org/patch/9166771/