Thread (12 messages) 12 messages, 5 authors, 2013-11-22

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

From: Jiri Kosina <hidden>
Date: 2013-11-19 14:33:55
Also in: lkml

On Thu, 7 Nov 2013, Benjamin Tissoires wrote:
quoted
quoted
[ 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
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help