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<DIV><FONT face=Arial size=2>Maybe this is realtek ring problem like in iPXE: <A
href="http://git.ipxe.org/ipxe.git/commitdiff/5d3d62d">http://git.ipxe.org/ipxe.git/commitdiff/5d3d62d</A></FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>"realtek_destroy_ring() currently does nothing if
the card is operating<BR>in legacy (pre-RTL8139C+) mode. In particular,
the producer and<BR>consumer counters are incorrectly left holding their current
values.<BR>Virtual hardware (e.g. the emulated RTL8139 in qemu and similar
VMs)<BR>is tolerant of this behaviour, but real hardware will fail to
transmit<BR>if the descriptors are not used in the correct order.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Fix by resetting the producer and consumer counters
in<BR>realtek_destroy_ring() even if the card is operating in legacy
mode.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Reported-by: Gelip <<A
href="mailto:mrgelip@gmail.com">mrgelip@gmail.com</A>><BR>Signed-off-by:
Michael Brown <<A
href="mailto:mcb30@ipxe.org">mcb30@ipxe.org</A>>"</FONT></DIV></BODY></HTML>