linux-kernel - Re: [PATCH] usb: gadget: udc: atmel: fix endpoint name

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Message-ID: <935cce30-cf9d-4605-1f3e-ac8e934993e6@atmel.com>
Date:   Mon, 24 Oct 2016 13:59:47 +0200
From:   Nicolas Ferre <nicolas.ferre@...el.com>
To:     Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Richard Genoud <richard.genoud@...il.com>,
        <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] usb: gadget: udc: atmel: fix endpoint name

Le 26/09/2016 à 09:18, Felipe Balbi a écrit :
> 
> Hi,
> 
> Greg Kroah-Hartman <gregkh@...uxfoundation.org> writes:
>> On Fri, Sep 23, 2016 at 04:20:45PM +0200, Nicolas Ferre wrote:
>>> Le 16/09/2016 à 10:36, Nicolas Ferre a écrit :
>>>> Le 15/09/2016 à 17:07, Alexandre Belloni a écrit :
>>>>> Since commit c32b5bcfa3c4 ("ARM: dts: at91: Fix USB endpoint nodes"),
>>>>> atmel_usba_udc fails with:
>>>>>
>>>>> ------------[ cut here ]------------
>>>>> WARNING: CPU: 0 PID: 0 at include/linux/usb/gadget.h:405
>>>>> ecm_do_notify+0x188/0x1a0
>>>>> Modules linked in:
>>>>> CPU: 0 PID: 0 Comm: swapper Not tainted 4.7.0+ #15
>>>>> Hardware name: Atmel SAMA5
>>>>> [<c010ccfc>] (unwind_backtrace) from [<c010a7ec>] (show_stack+0x10/0x14)
>>>>> [<c010a7ec>] (show_stack) from [<c0115c10>] (__warn+0xe4/0xfc)
>>>>> [<c0115c10>] (__warn) from [<c0115cd8>] (warn_slowpath_null+0x20/0x28)
>>>>> [<c0115cd8>] (warn_slowpath_null) from [<c04377ac>] (ecm_do_notify+0x188/0x1a0)
>>>>> [<c04377ac>] (ecm_do_notify) from [<c04379a4>] (ecm_set_alt+0x74/0x1ac)
>>>>> [<c04379a4>] (ecm_set_alt) from [<c042f74c>] (composite_setup+0xfc0/0x19f8)
>>>>> [<c042f74c>] (composite_setup) from [<c04356e8>] (usba_udc_irq+0x8f4/0xd9c)
>>>>> [<c04356e8>] (usba_udc_irq) from [<c013ec9c>] (handle_irq_event_percpu+0x9c/0x158)
>>>>> [<c013ec9c>] (handle_irq_event_percpu) from [<c013ed80>] (handle_irq_event+0x28/0x3c)
>>>>> [<c013ed80>] (handle_irq_event) from [<c01416d4>] (handle_fasteoi_irq+0xa0/0x168)
>>>>> [<c01416d4>] (handle_fasteoi_irq) from [<c013e3f8>] (generic_handle_irq+0x24/0x34)
>>>>> [<c013e3f8>] (generic_handle_irq) from [<c013e640>] (__handle_domain_irq+0x54/0xa8)
>>>>> [<c013e640>] (__handle_domain_irq) from [<c010b214>] (__irq_svc+0x54/0x70)
>>>>> [<c010b214>] (__irq_svc) from [<c0107eb0>] (arch_cpu_idle+0x38/0x3c)
>>>>> [<c0107eb0>] (arch_cpu_idle) from [<c0137300>] (cpu_startup_entry+0x9c/0xdc)
>>>>> [<c0137300>] (cpu_startup_entry) from [<c0900c40>] (start_kernel+0x354/0x360)
>>>>> [<c0900c40>] (start_kernel) from [<20008078>] (0x20008078)
>>>>> ---[ end trace e7cf9dcebf4815a6 ]---
>>>>>
>>>>> Fixes: c32b5bcfa3c4 ("ARM: dts: at91: Fix USB endpoint nodes")
>>>>> Reported-by: Richard Genoud <richard.genoud@...il.com>
>>>>> Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
>>>>
>>>> Acked-by: Nicolas Ferre <nicolas.ferre@...el.com>
>>>>
>>>> Felipe, Greg,
>>>> It is clearly a regression and material for 4.8-fixes. But I do know
>>>> that we are very late in the process :-(
>>>> Please do what you can to make it progress before 4.8-final but I'm
>>>> truly aware of the challenge.
>>>
>>> Any chance that we can have it (aka ping)?
>>
>> It's Felipe's area, not mine :)
> 
> Sorry, I had missed this one. Greg, seems like this would be the only
> pending fix. Do you want it in a pull request or would you prefer to
> just pick it up as a patch? Works either way for me. In case you decide
> to pick it up as a patch:
> 
> Acked-by: Felipe Balbi <felipe.balbi@...ux.intel.com>
> 
> If you prefer to pick it up as a pull request, I already have the patch
> in my 'fixes' branch, just need to tag it and send it to you.

Felipe,

We agreed to delay this patch after the merge window is closed. But I
feel that it's beginning to be urgent to make this patch go forward:
actual users of our kernel are facing the issue:

https://lkml.org/lkml/2016/10/17/493

We're already at -rc2 and I don't see USB-fixes included...

Best regards,
-- 
Nicolas Ferre