em driver testing

[Mike Jakubik]

Jack,

I have done some tests, here are my results. On 6.2-BETA3 i was able to 
get a timeout while compiling the kernel and ftping a large file from 
another server with the same card. On 6.2-STABLE cvsuped today i was not 
able to produce a timeout, i then applied your patch and the results 
were the same.

em0 at pci0:10:0:  class=0x020000 card=0x11768086 chip=0x10768086 rev=0x00 
hdr=0x00
    vendor   = 'Intel Corporation'
    device   = '82547EI Gigabit Ethernet Controller'