Huawei E3276 problem

[Tommy Cheng]

The debug output is as follows: 

# insmod /tmp/cdc_ncm.ko 
cdc_ncm: 14-Mar-2012
cdc_ncm 1-1:1.1: XX: ctx->control=81eec080, ctx->data=81eec080, ctx->ether_desc=814b67c8, intf=81eec080
cdc_ncm 1-1:1.1: XX: failed to claim interface: -16
usb 1-1: bind() failure
usbcore: registered new interface driver cdc_ncm




----- Original Message -----
From: Bjørn Mork <bjorn at mork.no>
To: Tommy Cheng <tommy7765 at yahoo.com>
Cc: Olof Ermis <olof.ermis at gmail.com>; libqmi-devel at lists.freedesktop.org
Sent: Tuesday, November 13, 2012 5:45 PM
Subject: Re: Huawei E3276 problem

Tommy Cheng <tommy7765 at yahoo.com> writes:

> The initial submitted cdc_ncm driver (2010/12/07 net.git) and 
>
> the latest submitted cdc_ncm driver(2012/08/04 net.git) are not
> working.  The driver can't bind to E3276 because of "bind() failure".
>
> The driver only works for me is from the below link.  That driver
> seems to be very similar to the initial subnitted one.  I'm still trying
> to find out why.
>
>
> http://www.spinics.net/lists/linux-usb/msg32494.html

Right.  That's older than I hoped for.  I think we have better chances
if you can add some debug printk's in the cdc_ncm_bind function.
Knowing which error exit it takes, and also the value of the tested
variables would be useful.

Could you and/or Olof please test the attached patch on top of either
v3.6.x or current mainline (which are identical wrt to cdc_ncm)?  It
includes the new device IDs and some additional temporary debug output.

This should help us see where the problem is.  I fear that it may be in
cdc_ncm_setup(), in which case we need further testing, but at least
this patch will tell us.


Bjørn

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