Help writing a custom HID driver

[Jose Diez <jose@mediacru.sh>]

Hello linux-input,

I'm trying to write a custom HID driver. It works fine, and I can send 
reports just fine, but one of the requirements of this device is that I 
have to reply to reports with code 62 with another report with code 62, 
which resets a watchdog in the device.

This is my code so far: http://codepad.org/m4QiWhDt

The problem is in line 40. It seems like I'm not allowed to call 
hid_hw_output_report from the raw_event callback handler. I've tried 
surrounding the call with spin_locks, but I still get the "scheduling 
while atomic" error.

I'm not sure how to approach this - can someone help? It would be much 
appreciated. Thanks.