linux-kernel - Re: OOPS after connection Droids MuIn USB display

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Date:	Fri, 06 May 2011 12:51:02 +0200
From:	Erik Slagter <erik@...gter.name>
To:	linux-kernel@...r.kernel.org
Subject: Re: OOPS after connection Droids MuIn USB display

Following up on this bug I have found the location of the OOPS in source 
code (using bisection). It's clearly not the source of the problem, but 
I hope it will help.

In the file drivers/usb/class/cdc-acm.c, around line 1098, there is a 
comment "/*workaround for switched interfaces */" and then a check:

if (data_interface->cur_altsetting->desc.bInterfaceClass != 
CDC_DATA_INTERFACE_TYPE)

At this point, the variable data_interface is NULL and this causes the OOPS.

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