On Fri, 18 Jun 1999 19:06:30 +0200 (MEST) 
 Zdenek Salvet <salvet@ics.muni.cz> wrote:

 >     This is caused by epic driver incorrectly setting length of packet
 >     on receive and ARP code that fights back with ARP reply in the same mbuf
 >     with unchanged length. 2046 bytes long frame then makes the transmit
 >     pipe of the 83c170 chip hang.

I owe you many beers!  I have been hunting that transmit timeout bug
FOREVER, but never managed to spot it (obviously)!

THANKS VERY MUCH FOR THE PATCH!

        -- Jason R. Thorpe <thorpej@nas.nasa.gov>