K 10
svn:author
V 6
adrian
K 8
svn:date
V 27
2014-10-11T22:13:24.273431Z
K 7
svn:log
V 514
MFC r271784 - Fix the handling of EOP in status descriptors for if_igb(4)
and don't double-free mbufs.

Like ixgbe(4) chipsets, EOP is only set on the final descriptor
in a chain of descriptors.  So, to free the whole list of descriptors,
we should free the current slot _and_ the assembled list of descriptors
that make up the fragment list.

The existing code was setting discard once it saw EOP + an error status;
it then freed all the subsequent descriptors until the next EOP. That's
totally the wrong order.

END