Re: kernel panic on gpio-keys

[Paul Cercueil <pcercuei@gmail.com>]

On 14/12/2013 10:39, Dmitry Torokhov wrote:
> On Wed, Dec 11, 2013 at 08:17:29PM +0100, Paul Cercueil wrote:
>> Hi there,
>>
>> I am trying to use the gpio-keys driver to inject joystick events.
>> There seems to be some basic support of it, looking at <linux/gpio_keys.h>.
>>
>> However, registering the following will trigger a kernel panic in
>> the kernel:
>>
>> static struct gpio_keys_button my_buttons[] {
>> 	{
>> 		.gpio = GPIO_FOO,
>> 		.type = EV_ABS,
>> 		.code = ABS_HAT0X,
>> 		.value = 1,
>> 	},
>> };
>>
>> (tested on kernel 3.12).
>>
>> I don't know well the input subsystem, so I have no idea of what is
>> going wrong. Could anybody try to at least reproduce the issue?
>
> It woudl be helpful if you poster the stack trace from panic so we'd
> have an idea where the fault happens.
>
> Thanks.
>

Here is the crash log I get: http://pastebin.com/FzTTGxsR
(I did put it on pastebin because it's huge, 200+ lines).

The first OOPS happen as soon as the GPIO button is pressed; the other 
ones seem to happen recursively. I included only a part of the log I 
get, as the OOPSes continue to flow until the watchdog kicks in.