Re: kern/43475: MTK 747 A+ GPS recorder has a bogus descriptor

[Jasper Wallace <jasper%pointless.net@localhost>]

On Tue, 15 Jun 2010, Jonathan A. Kollasch wrote:

> The following reply was made to PR kern/43475; it has been noted by GNATS.
> 
> From: "Jonathan A. Kollasch" <jakllsch%kollasch.net@localhost>
> To: gnats-bugs%NetBSD.org@localhost
> Cc: 
> Subject: Re: kern/43475: MTK 747 A+ GPS recorder has a bogus descriptor
> Date: Tue, 15 Jun 2010 21:09:45 +0000
> 
>  So, you (were) get(ing) a "umodem0: no pointer to data interface" error?

I can't remember what the error was, but there definatly wasn't a ucom 
attachment, i can try with an unpatched kernel if it's important.

>  Taking a hint from Linux and cdce(4), it would appear something
>  along the lines of the CDCE_NO_UNION quirk would be more appropriate.

Maybe, but this device does have a cdc union, it's just hidden behind the 
bogus descriptor length. Also fixing this without a quirk may make the fix 
just work with a larger range of devices and save someone having to work 
out what the problem is and patch the kernel to make the device work for 
them.

>  Also, I'd sooner see USB_PRODUCT_MEDIATEK_MT3329, as this ID appears
>  to be used in multiple products based on the MT3329 chip, and "MTK"
>  doesn't seem similar enough to the name listed in the USB-IF vendor
>  number database.

Whatever is appropiate, it's not particulary important.

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