bug: usb: gadget: FSL_UDC_CORE Corrupted request list leads to unrecoverable loop.

[Thorsten Leemhuis]

Hi, this is your Linux kernel regression tracker speaking.

On 04.12.21 01:40, Leo Li wrote:
>> -----Original Message-----
>> From: Joakim Tjernlund <Joakim.Tjernlund at infinera.com>
>> Sent: Thursday, December 2, 2021 4:45 PM
>> To: regressions at leemhuis.info; Leo Li <leoyang.li at nxp.com>;
>> Eugene_Bordenkircher at selinc.com; linux-usb at vger.kernel.org; linuxppc-
>> dev at lists.ozlabs.org
>> Cc: gregkh at linuxfoundation.org; balbi at kernel.org
>> Subject: Re: bug: usb: gadget: FSL_UDC_CORE Corrupted request list leads to
>> unrecoverable loop.
>>
>> On Thu, 2021-12-02 at 20:35 +0000, Leo Li wrote:
>>>
>>>> -----Original Message-----
>>>> From: Joakim Tjernlund <Joakim.Tjernlund at infinera.com>
>>>> Sent: Wednesday, December 1, 2021 8:19 AM
>>>> To: regressions at leemhuis.info; Leo Li <leoyang.li at nxp.com>;
>>>> Eugene_Bordenkircher at selinc.com; linux-usb at vger.kernel.org;
>>>> linuxppc- dev at lists.ozlabs.org
>>>> Cc: gregkh at linuxfoundation.org; balbi at kernel.org
>>>> Subject: Re: bug: usb: gadget: FSL_UDC_CORE Corrupted request list
>>>> leads to unrecoverable loop.
>>>>
>>>> On Tue, 2021-11-30 at 12:56 +0100, Joakim Tjernlund wrote:
>>>>> On Mon, 2021-11-29 at 23:48 +0000, Eugene Bordenkircher wrote:
>>>>>> Agreed,
>>>>>>
>>>>>> We are happy pick up the torch on this, but I'd like to try and
>>>>>> hear from
>>>> Joakim first before we do.  The patch set is his, so I'd like to
>>>> give him the opportunity.  I think he's the only one that can add a
>>>> truly proper description as well because he mentioned that this
>>>> includes a "few more fixes" than just the one we ran into.  I'd
>>>> rather hear from him than try to reverse engineer what was being
>> addressed.
>>>>>>
>>>>>> Joakim, if you are still watching the thread, would you like to
>>>>>> take a stab
>>>> at it?  If I don't hear from you in a couple days, we'll pick up the
>>>> torch and do what we can.

Did anything happen? Sure, it's a old regression from the v3.4-rc4 days,
but there iirc was already a tested proto-patch in that thread that
fixes the issue. Or was progress made and I just missed it?

Ciao, Thorsten

P.S.: As a Linux kernel regression tracker I'm getting a lot of reports
on my table. I can only look briefly into most of them. Unfortunately
therefore I sometimes will get things wrong or miss something important.
I hope that's not the case here; if you think it is, don't hesitate to
tell me about it in a public reply, that's in everyone's interest.

BTW, I have no personal interest in this issue, which is tracked using
regzbot, my Linux kernel regression tracking bot
(https://linux-regtracking.leemhuis.info/regzbot/). I'm only posting
this mail to get things rolling again and hence don't need to be CC on
all further activities wrt to this regression.

#regzbot ignore-activity

>>>>> I am far away from this now and still on 4.19. I don't mind if you
>>>>> tweak
>>>> tweak the patches for better "upstreamability"
>>>>
>>>> Even better would be to migrate to the chipidea driver, I am told
>>>> just a few tweaks are needed but this is probably something NXP
>>>> should do as they have access to other SOC's using chipidea.
>>>
>>> I agree with this direction but the problem was with bandwidth.  As this
>> controller was only used on legacy platforms, it is harder to justify new effort
>> on it now.
>>
>> Legacy? All PPC is legacy and not supported now?
> 
> I'm not saying that they are not supported, but they are in maintenance only mode.