From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Wahren Subject: Re: usb/net/hso: WARNING: ungligned urb->setup_dma Date: Fri, 3 Mar 2017 16:31:31 +0100 Message-ID: <565616b2-e8f7-e704-1ac5-f84b57ca5ba8@i2se.com> References: <20170228082810.syn656o2zzms7urf@tarshish> <20170228120134.4f65yihw7x22hfwd@tarshish> <36230d64-4ba0-7515-1131-ecf3ab9f352c@i2se.com> <20170228180700.3fxpimfysnhm6uis@tarshish> <1515966850.16584.1488306729844@email.1und1.de> <20170301105437.tmm6ovmnrhce3ofa@tarshish> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: John Youn , netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Olivier Sobrie , linux-rpi-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org To: Baruch Siach Return-path: In-Reply-To: <20170301105437.tmm6ovmnrhce3ofa@tarshish> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-rpi-kernel" Errors-To: linux-rpi-kernel-bounces+glkr-linux-rpi-kernel=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: netdev.vger.kernel.org Hi Baruch, Am 01.03.2017 um 11:54 schrieb Baruch Siach: > Hi Stefan, > > On Tue, Feb 28, 2017 at 07:32:09PM +0100, Stefan Wahren wrote: >>> Baruch Siach hat am 28. Februar 2017 um 19:07 geschrieben: >>> 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. >> only a suspicion, but could you please try this patch [1]? >> >> [1] - https://patchwork.kernel.org/patch/9166771/ > It doesn't change anything. > > My guess is that source of the issue is memory corruption that just happens to > corrupt also the setup_dma field of struct urb. In other words, it has nothing > to do with DMA, IMO. may you could use CONFIG_DMA_API_DEBUG or CONFIG_SLUB_DEBUG in order to find the source? > > Thanks, > baruch >