linux-kernel - Re: [PATCH 2/2] usb: serial: option: add Cellient MPL200 card

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Message-ID: <20201005110638.GP5141@localhost>
Date:   Mon, 5 Oct 2020 13:06:38 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Wilken Gottwalt <wilken.gottwalt@...lbox.org>
Cc:     Johan Hovold <johan@...nel.org>, linux-kernel@...r.kernel.org,
        Bjørn Mork <bjorn@...k.no>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        netdev@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH 2/2] usb: serial: option: add Cellient MPL200 card

On Mon, Oct 05, 2020 at 01:01:34PM +0200, Wilken Gottwalt wrote:
> On Mon, 5 Oct 2020 10:20:45 +0200
> Johan Hovold <johan@...nel.org> wrote:
> 
> > On Sat, Oct 03, 2020 at 11:40:29AM +0200, Wilken Gottwalt wrote:
> > > Add usb ids of the Cellient MPL200 card.
> > > 
> > > Signed-off-by: Wilken Gottwalt <wilken.gottwalt@...lbox.org>
> > > ---

> > > @@ -1982,6 +1983,8 @@ static const struct usb_device_id option_ids[] = {
> > >  	{ USB_DEVICE_AND_INTERFACE_INFO(MEDIATEK_VENDOR_ID, MEDIATEK_PRODUCT_DC_4COM2, 0xff,
> > > 0x02, 0x01) }, { USB_DEVICE_AND_INTERFACE_INFO(MEDIATEK_VENDOR_ID, MEDIATEK_PRODUCT_DC_4COM2,
> > > 0xff, 0x00, 0x00) }, { USB_DEVICE(CELLIENT_VENDOR_ID, CELLIENT_PRODUCT_MEN200) },
> > > +	{ USB_DEVICE(CELLIENT_VENDOR_ID, CELLIENT_PRODUCT_MPL200),
> > > +	  .driver_info = RSVD(1) | RSVD(4) },
> > 
> > Would you mind posting the output of "lsusb -v" for this device?
> 
> I would like to, but unfortunately I lost access to this really rare hardware
> about a month ago. It is a Qualcomm device (0x05c6:0x9025) with a slightly
> modified firmware to rebrand it as a Cellient product with a different vendor
> id. How to proceed here, if I have no access to it anymore? Drop it?

No, that's ok, I've applied the patch now. It's just that in case we
ever need to revisit the handling of quirky devices, it has proven
useful to have a record the descriptors.

Do you remember the interface layout and why you blacklisted interface
1?

Johan