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: <20150629214854.GL1019@saruman.tx.rr.com>
Date:	Mon, 29 Jun 2015 16:48:54 -0500
From:	Felipe Balbi <balbi@...com>
To:	Felipe Balbi <balbi@...com>, John Youn <johnyoun@...opsys.com>
CC:	Subbaraya Sundeep Bhatta <subbaraya.sundeep.bhatta@...inx.com>,
	<gregkh@...uxfoundation.org>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...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

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

-- 
balbi

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