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Subject: Re: [RFC][PATCH 0/2] Avoiding DWC3 transfer stalls/hangs when using
 adb over f_fs
To:     John Stultz <john.stultz@linaro.org>,
        lkml <linux-kernel@vger.kernel.org>
Cc:     Felipe Balbi <felipe.balbi@linux.intel.com>,
        Yang Fei <fei.yang@intel.com>,
        Thinh Nguyen <thinhn@synopsys.com>,
        Tejas Joglekar <tejas.joglekar@synopsys.com>,
        Jack Pham <jackp@codeaurora.org>, Todd Kjos <tkjos@google.com>,
        Greg KH <gregkh@linuxfoundation.org>,
        Linux USB List <linux-usb@vger.kernel.org>,
        stable <stable@vger.kernel.org>
References: <20200122222645.38805-1-john.stultz@linaro.org>
From:   Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Message-ID: <ef64036f-7621-50d9-0e23-0f7141a40d7a@collabora.com>
Date:   Thu, 23 Jan 2020 09:43:47 +0100
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Hi John,

W dniu 22.01.2020 o 23:26, John Stultz pisze:
> Hey all,
>    I wanted to send these out for comment and thoughts.
> 
> Since ~4.20, when the functionfs gadget enabled scatter-gather
> support, we have seen problems with adb connections stalling and
> stopping to function on hardware with dwc3 usb controllers.
> Specifically, HiKey960, Dragonboard 845c, and Pixel3 devices.

Any chance this:

https://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb.git/commit/?h=testing/next&id=f63333e8e4fd63d8d8ae83b89d2c38cf21d64801

has something to do with the problem you are reporting?

Andrzej