linux-kernel - Re: [appleir] BUG: unable to handle kernel NULL pointer dereference

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Message-ID: <alpine.LNX.2.00.1311191533200.6657@pobox.suse.cz>
Date:	Tue, 19 Nov 2013 15:33:49 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	James Henstridge <james.henstridge@...onical.com>
Cc:	Luis Henriques <luis.henriques@...onical.com>,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
	Fabien André <fabien.andre@...il.com>,
	Bastien Nocera <hadess@...ess.net>
Subject: Re: [appleir] BUG: unable to handle kernel NULL pointer
 dereference

On Thu, 7 Nov 2013, Benjamin Tissoires wrote:

> >> [ adding some more CCs ]
> >>
> >> Okay, so apparently we didn't register with input, but only hiddev /
> >> hidraw.
> >>
> >> appleir 0003:05AC:8240.0005: hiddev0,hidraw4: USB HID v1.11 Device [Apple Computer, Inc. IR Receiver] on usb-0000:00:1d.3-2/input0
> >>
> >> Therefore ->input_configured() callback has never been called, and thus we
> >> oops due to appleir->input_dev being NULL when the first raw event is
> >> reported.
> >>
> >> Could you please provide report descriptor of the device?
> >>
> >> The driver apparently relies on it being registered with hid-input, but
> >> for some reason that doesn't happen.
> > 
> > Here is the relevant lsusb output that I think contains what you're
> > asking for (I had to unbind usbhid for it to include the descriptor):
> > 
> > Bus 005 Device 003: ID 05ac:8240 Apple, Inc. Built-in IR Receiver
> > Device Descriptor:
> >   bLength                18
> >   bDescriptorType         1
> >   bcdUSB               2.00
> > ...
> 
> Ok, thanks for the report. Could you please test the following patch
> which should solve your problem (hopefully)?

James,

any reults from testing Benjamin's patch, please?

-- 
Jiri Kosina
SUSE Labs
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