linux-kernel - Re: [PATCH v2 3/3] usb: dwc3: gadget: return error if command sent to DEPCMD register fails

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Message-ID: <2B3535C5ECE8B5419E3ECBE3007729090175264F3B@US01WEMBX2.internal.synopsys.com>
Date:	Thu, 2 Jul 2015 02:03:14 +0000
From:	John Youn <John.Youn@...opsys.com>
To:	"balbi@...com" <balbi@...com>, John Youn <John.Youn@...opsys.com>
CC:	Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@...inx.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	Subbaraya Sundeep Bhatta <sbhatta@...inx.com>
Subject: Re: [PATCH v2 3/3] usb: dwc3: gadget: return error if command sent
 to DEPCMD register fails

On 6/29/2015 2:48 PM, Felipe Balbi wrote:
> Hi again,
> 
> On Mon, Jun 29, 2015 at 04:47:01PM -0500, Felipe Balbi wrote:
>> On Thu, May 21, 2015 at 03:46:48PM +0530, Subbaraya Sundeep Bhatta wrote:
>>> We need to return error to caller if command is not sent to
>>> controller succesfully.
>>>
>>> Signed-off-by: Subbaraya Sundeep Bhatta <sbhatta@...inx.com>
>>> Fixes: 72246da40f37 (usb: Introduce DesignWare USB3 DRD Driver)
>>> Cc: <stable@...r.kernel.org>
>>> ---
>>> v2 changes:
>>> 	Added Fixes and Cc in commit message.
>>
>> I noticed that this breaks at least my AM437x silicon with DWC3 2.40a
>> when used with g_zero and testusb. As of now, it could be that silicon
>> is mis-behaving because I got a Transfer Complete before the failing Set
>> Endpoint Transfer Resource command.
>>
>> In any case, can you run on your setup with g_zero and test.sh/testusb
>> [1]/[2] just to verify that it really works for you ?
>>
>> Meanwhile, I'll continue testing on my end.
>>
>> cheers
>>
>> [1] https://gitorious.org/usb/usb-tools/source/47ef073d9b6c0eae816204c81374aafb795c6e40:testusb.c
>> [2] https://gitorious.org/usb/usb-tools/source/47ef073d9b6c0eae816204c81374aafb795c6e40:test.sh
> 
> Adding John here. John, any chance you could fire up dwc3 on HAPS and
> see wether it works or fails for you ?
> 
> cheers
> 

Hi Felipe,

Just an update on this.

I'm trying to get this working with our latest IP with dwc3 from your testing/next branch. It fails the usbtest with a problem unrelated to this patch.

It passes on 4.1.1.

I'll have to look into the failure but I won't get to it until next week as I'm off the rest of this week.

Regards,
John



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