commit 78566fecbb12a7616ae9a88b2ffbc8062c4a89e3
Author: Christopher Li <chrisl@vmware.com>
Date: Fri Sep 5 14:04:05 2008 -0700
e1000: prevent corruption of EEPROM/NVM
Andrey reports e1000 corruption, and that a patch in vmware's ESX fixed
it.
The EEPROM corruption is triggered by concurrent access of the EEPROM
read/write. Putting a lock around it solve the problem.

