> -----Original Message-----
> From: Peter Chen [mailto:peter.c...@freescale.com]
> Sent: 2014年2月25日 13:15
> To: Neil Zhang
> Cc: ba...@ti.com; gre...@linuxfoundation.org; linux-usb@vger.kernel.org;
> linux-ker...@vger.kernel.org
> Subject: RE: [PATCH 2/6] usb: gadget: mv_udc: disable HW zlt for ep0
>
>
>
>
> > > On Mon, Feb 24, 2014 at 04:03:12PM +0800, Neil Zhang wrote:
> > > > Hardware zlt will try to send the zero length packet automatically
> > > > when the data transferd is multiple times of max packet, this will
> > > > cause issues on Windows.
> > > > So let's disable HW zlt by default.
> > >
> > > Would you have description that what kinds of issue on Windows if
> > > zlt is is selected?
> > >
> >
> > Enumeration will fail.
> >
>
> What causes enumeration fail, why it does not occur before?
>
A unexpected zero packet cause enumeration fail.
It's not easy that the descriptor is actually 1024 bytes, so not easy to be
found.
> Peter
Best Regards,
Neil Zhang
N�Р骒r��y����b�X�肚�v�^�)藓{.n�+�伐�{焙柒��^n�r■�z���h�ㄨ��&Ⅷ �G���h�(�����茛j"���m����赇z罐��帼f＂�h���~�m�
