cvs commit: src/sys/dev/em if_em.c

[Pyun YongHyeon]

yongari     2006-08-14 02:21:26 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/em           if_em.c 
  Log:
  Make em(4) handle too many fragmented frame with m_defrag(9).
  Previously em(4) requeued the failed mbuf chains from
  bus_dmamap_load_mbuf_sg(9) failure to resend it later. However,
  bus_dmamap_load_mbuf_sg(9) may never complete its request as the
  fragmented frames can have more than EM_MAX_SCATTER segments.
  To handle the above EFBIG case, defragment the frame with m_defrag(9)
  and free the mbuf chain if it can't deframent the chain due to
  resource shortage.
  
  Reviewed by     glebius (with improvements)
  
  Revision  Changes    Path
  1.130     +33 -12    src/sys/dev/em/if_em.c