>>894
これがあやしそうな予感が。

http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/e1000/e1000_phy.c?f=h;content-type=text%2Fx-cvsweb-markup;ln=1;rev=1.4#l1377

/**
* e1000_phy_force_speed_duplex_ife - Force PHY speed & duplex
* @hw: pointer to the HW structure
*
* Forces the speed and duplex settings of the PHY.
* This is a function pointer entry point only called by
* PHY setup routines.
**/