FPGA-driven debug dev_dbg no output

Recently need to debug an FPGA driver, the whole egg hurts! Dev_dbg want to use this as debug output is unsuccessful, has been completely defeated! Reflection in ...

At present, according to the following related settings can not print, and online said some of the discrepancy, the problem has to be studied.

Where the driver calls dev_dbg

Punch-in Debug function

The console default level for PRINTK.C is also modified to 8.

Device.h file

#insmod 3s3gs.ko
3S3GS Ethernet Driver, V0.11
FPGA ID 23310001
FPGA version:0.9b022, timecode:2014-02-12
Probe 3S3GS Done

Load drive via Insmod, display!

There is no information associated with the execution of DMESG. It's really scary!

FPGA-driven debug dev_dbg no output