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

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Date:	Tue, 7 Jul 2015 05:01:43 +0000
From:	Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@...inx.com>
To:	"balbi@...com" <balbi@...com>
CC:	"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>
Subject: RE: [PATCH v2 3/3] usb: dwc3: gadget: return error if command sent
 to DEPCMD register fails

Hi Felipe,

> -----Original Message-----
> From: Felipe Balbi [mailto:balbi@...com]
> Sent: Monday, July 06, 2015 10:38 PM
> To: Subbaraya Sundeep Bhatta
> Cc: balbi@...com; gregkh@...uxfoundation.org; linux-usb@...r.kernel.org;
> linux-kernel@...r.kernel.org; stable@...r.kernel.org
> Subject: Re: [PATCH v2 3/3] usb: dwc3: gadget: return error if command
> sent to DEPCMD register fails
> 
> On Wed, Jul 01, 2015 at 07:29:28AM +0000, Subbaraya Sundeep Bhatta
> wrote:
> > Hi Felipe,
> >
> > > -----Original Message-----
> > > From: Felipe Balbi [mailto:balbi@...com]
> > > Sent: Tuesday, June 30, 2015 3:17 AM
> > > To: Subbaraya Sundeep Bhatta
> > > Cc: balbi@...com; gregkh@...uxfoundation.org;
> > > linux-usb@...r.kernel.org; linux-kernel@...r.kernel.org;
> > > stable@...r.kernel.org; Subbaraya Sundeep Bhatta
> > > Subject: Re: [PATCH v2 3/3] usb: dwc3: gadget: return error if
> > > command sent to DEPCMD register fails
> > >
> > > Hi,
> > >
> > > 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 ?
> >
> > Ok I will do that.
> 
> Did you manage to run the test I asked ? If we don't get down to this, I'll
> have to revert your patch as it regresses my platforms.

Sorry I caught up with some other customer reported issue on Zynq (Chipidea). I will do it by this weekend at any cost. Please wait.

Thanks,
Sundeep.B.S.

> 
> --
> balbi
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