From: "Ren, Cloud" <redacted>
Date: Wed, 19 Oct 2011 07:44:02 +0000

Ok. What logging interfaces can I use? Are they dev_err, dev_info and dev_warn ? thanks

netif_*(), they check netif_msg_*() to see if the particular kind
of logging message is enabled or not, and this can be set dynamically
if you code your driver to properly set netdev->msg_enable.

Use other drivers as examples.