linux-kernel - Re: [PATCH 1/5] usb: xhci: cleanup xhci

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Date:	Mon, 25 May 2015 18:05:27 +0300
From:	Mathias Nyman <mathias.nyman@...ux.intel.com>
To:	Roger Quadros <rogerq@...com>,
	Andrew Bresticker <abrestic@...omium.org>
CC:	mathias.nyman@...el.com, Alan Stern <stern@...land.harvard.edu>,
	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] usb: xhci: cleanup xhci_hcd allocation

>>>>
>>>> I've been testing add/remove HCD extensively and didn't observe any issues after applying
>>>> these 5 patches. Well there is one issue that comes up but it has nothing to do with xhci
>>>> not being allocated. It has more to do with command being queued after the HCD has gone away
>>>> and so getting stuck forever without timing out.
>>>
>>> I went through the codepaths and you're right, should work fine. My concern wasn't valid.
>>> This patchset doesn't even touch the order how primary and shared HCDs are created and added
>>> in the PCI case, only for the platform device case.
>>>
>>> I'll try it out and send forward once rc1 is out.
>>
>> did you get a chance to try this series?
>>
> 
> Sorry, not yet, got delayed by other internal tasks.
> I'll try it out as soon as possible.
> 
>

Ok, back to this, I'd like to get both this series and Andrew's xhci-tegra
support to 4.2

I did similar changes to xhci-tegra.c as Roger did to xhci-pci.c and xhci-plat.c,
but I can't test them and would need both your eyes on this to make sure it looks ok.

Both series are in a tegra_otg_merge topic branch in:
  
git://git.kernel.org/pub/scm/linux/kernel/git/mnyman/xhci.git tegra_otg_merge

It contains Andrews full xhci tegra support series, but If I understood correctly only
patch 9/9 (maybe 8/9 as well?) will actually go through the xhci tree. 
Patch 1/9 is not needed with Roger's changes anymre  

The changes are in the last patch, here:
https://git.kernel.org/cgit/linux/kernel/git/mnyman/xhci.git/commit/?h=tegra_otg_merge

and would be squashed together with patch 9/9.

Thanks
Mathias 
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