linux-kernel - Re: v3.11-rc1 USB regressions

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Date:	Wed, 24 Jul 2013 21:04:28 +0200
From:	Daniel Mack <zonque@...il.com>
To:	Aaro Koskinen <aaro.koskinen@....fi>
CC:	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: v3.11-rc1 USB regressions

Hi Aaro,

On 24.07.2013 20:51, Aaro Koskinen wrote:
> On Tue, Jul 16, 2013 at 08:57:10PM +0300, Aaro Koskinen wrote:

>> Here are full details:
>>
>> Kernel v3.11-rc1 and the following USB fixes:
>> 	ARM: omap2: fix musb usage for n8x0
>> 	musb: omap: Fix: pass all the resources to musb core
> 
> [...]
> 
>> When I revert fe4cb0912f8e737f8e4b8b38b9e692f8062f5423 and
>> 8b125df5b24cfb0ec7fa1971e343cc0badc1827d, it works like before (3.10):
> 
> I'm now running -rc2 with above fixes and reverts (the only way to get
> USB working). I'm seeing an additional issue, the following crash happens
> always on N900 when doing "poweroff":

Yes, with the mentioned patches reverted, musb_to_hcd() will return a
faulty pointer. You can't easily revert them unfortunately.

Your platform needs a real fix, I just have trouble understanding why a
removed usb_add_hcd() would make the gadget code fail.

Sorry for the trouble, but I don't currently have a board with musb in
gadget mode to reproduce this issue.


Thanks,
Daniel

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