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Subject: Re: msm_hsusb 78d9000.usb: failed to create device link to
 ci_hdrc.0.ulpi
To:     Andy Shevchenko <andy.shevchenko@gmail.com>,
        Jack Pham <jackp@codeaurora.org>
CC:     Peter Chen <peter.chen@nxp.com>,
        Naresh Kamboju <naresh.kamboju@linaro.org>,
        "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "lkft-triage@lists.linaro.org" <lkft-triage@lists.linaro.org>,
        Linux-Next Mailing List <linux-next@vger.kernel.org>
References: <CA+G9fYtnwFVPQxgHOU2Bi9y5+q4sSsww47yxK+_3ZAQ9=kyhUg@mail.gmail.com>
 <20200219013824.GB8602@b29397-desktop>
 <20200219024534.GB10078@jackp-linux.qualcomm.com>
 <CAHp75VfY1Y-jNr=YTfAO+eUOy3xUy9+AgtyJuhEk2ngrxMg5JA@mail.gmail.com>
From:   Alexandre Torgue <alexandre.torgue@st.com>
Message-ID: <c39584b0-302e-d1bb-2e97-ffc017755bf2@st.com>
Date:   Wed, 19 Feb 2020 11:00:33 +0100
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Hi Andy

On 2/19/20 10:23 AM, Andy Shevchenko wrote:
> On Wed, Feb 19, 2020 at 4:46 AM Jack Pham <jackp@codeaurora.org> wrote:
>>
>> On Wed, Feb 19, 2020 at 01:38:22AM +0000, Peter Chen wrote:
>>> On 20-02-17 14:02:57, Naresh Kamboju wrote:
>>>> arm64 APQ 8016 SBC ( Dragonboard 410c)  device running Linux next boot
>>>> failed due to below error.
>>>>
>>>> [    0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd030]
>>>> [    0.000000] Linux version 5.6.0-rc2-next-20200217 (oe-user@oe-host)
>>>> (gcc version 7.3.0 (GCC)) #1 SMP PREEMPT Mon Feb 17 04:27:31 UTC 2020
>>>> [    0.000000] Machine model: Qualcomm Technologies, Inc. APQ 8016 SBC
>>>> <>
>>>> [    4.439291] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.448891] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.457879] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.467331] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.475636] mmc0: new HS200 MMC card at address 0001
>>>> [    4.478895] mmcblk0: mmc0:0001 DS2008 7.28 GiB
>>>> [    4.480629] mmcblk0boot0: mmc0:0001 DS2008 partition 1 4.00 MiB
>>>> [    4.484719] mmcblk0boot1: mmc0:0001 DS2008 partition 2 4.00 MiB
>>>> [    4.492247] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.502611] mmcblk0rpmb: mmc0:0001 DS2008 partition 3 4.00 MiB,
>>>> chardev (234:0)
>>>> [    4.506949] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.517901] random: fast init done
>>>> [    4.521420] mmc1: new ultra high speed SDR104 SDHC card at address aaaa
>>>> [    4.523400] mmcblk1: mmc1:aaaa SL16G 14.8 GiB
>>>> [    4.532843] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.539131]  mmcblk0: p1 p2 p3 p4 p5 p6 p7 p8 p9 p10 p11 p12 p13 p14
>>>> [    4.542309]  mmcblk1: p1
>>>> [    4.561843] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.573481] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.585283] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.592622] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.600074] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.607204] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>> [    4.614679] msm_hsusb 78d9000.usb: failed to create device link to
>>>> ci_hdrc.0.ulpi
>>>
>>> The chipidea USB code hasn't changed recently. Would you please bisect
>>> which commit affect it?
>>
>> Probably same cause as for this:
>> https://bugzilla.kernel.org/show_bug.cgi?id=206435
> 
> Yes, it's the same. I dunno why no fix yet available.
> 

Kishon has posted a patch yesterday for device link issue in phy core. 
Please see:

https://lkml.org/lkml/2020/2/18/272

regards
Alex