linux-kernel - Re: usb: dwc3: some USB devices not working after 6.4.8

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Message-ID: <20230907235514.hqxd4gti3kentiw2@synopsys.com>
Date:   Thu, 7 Sep 2023 23:55:23 +0000
From:   Thinh Nguyen <Thinh.Nguyen@...opsys.com>
To:     Kenta Sato <tosainu.maple@...il.com>
CC:     Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Bagas Sanjaya <bagasdotme@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jisheng Zhang <jszhang@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux Regressions <regressions@...ts.linux.dev>,
        Linux USB <linux-usb@...r.kernel.org>,
        Linux Stable <stable@...r.kernel.org>
Subject: Re: usb: dwc3: some USB devices not working after 6.4.8

On Fri, Sep 08, 2023, Kenta Sato wrote:
> On Wed, Sep 6, 2023 at 10:32 AM Thinh Nguyen <Thinh.Nguyen@...opsys.com> wrote:
> Hi Thinh,
> 
> I tested your patch with 6.5.1. It seems to solve the issue and the
> kernel worked the same as 6.4.7.
> 
> I attached three log (dmesg) files:
> - withpatch.log --- 6.5.1 + patch
>   The kernel could detect both USB devices. No "-ETIMEDOUT: failed to
> initialize core" message.
> - nopatch.log --- 6.5.1 without any patches (case 1)
>   The kernel could detect  NETGEAR A6210 but not BUFFALO USB Flash Disk.
>   That was happening less often (about 1 time per 5 boots).
> - nopatch-succ.log --- 6.5.1 without any patches (case 2)
>   The kernel could detect both USB devices even if it showed
> "-ETIMEDOUT: failed to initialize core".
> 
> Please let me know if you need anything else.
> 
> Thank you.
> Kenta
> 

Thanks for the report and the test!

I'll prepare a proper patch when v6.6 rc-1 is released. I need to
cleanup and reduce some of the delays in this experiment.

BR,
Thinh