CAN devices debugging messages

configname: CONFIG_CAN_DEBUG_DEVICES

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>CAN Device Drivers
└─>CAN devices debugging messages
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
Say Y here if you want the CAN device drivers to produce a bunch of
debug messages to the system log. Select this if you are having
a problem with CAN support and want to see more of what is going
on.