Then, run gdb on that module, and look up the offset with the list command. This will only work if you've compiled that module with -g to include debugging information. However, I prefer that bug reports be posted to my web site, so that they can be seen by others. If this is undefined, debugging code will not be compiled. If set to 0, the code is compiled but inactive.
Larger numbers specify increasing levels of verbosity.
This can be adjusted when the module is loaded, so output can be controlled on a per-module basis without recompiling. Your default configuration for syslogd may discard kernel debugging messages. They are most useful if you have access to a datasheet for the corresponding controller chip. It can be bound to any card, and does not interfere with other drivers. It can be used to directly access any card's attribute memory or common memory.