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From: Adrian Chadd <adrian@FreeBSD.org>
Date: Tue, 29 Mar 2011 15:59:07 +0000 (UTC)
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Subject: cvs commit: src/sys/dev/ath if_ath.c if_ath_sysctl.c if_athioctl.h
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adrian      2011-03-29 15:59:07 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/ath          if_ath.c if_ath_sysctl.c if_athioctl.h 
  Log:
  SVN rev 220132 on 2011-03-29 15:59:07Z by adrian
  
  According to ath9k recv.c, one shouldn't be doing self-linked descriptors
  in the RX path when doing 11n and block-ack'ed frames. Apparently, the MAC
  will loop over that self-linked descriptor and treat it as "good enough"
  for (incorrectly!) ACKing the frames in the block-ack.
  
  Until I figure out how to work around this issue in the future, this counter
  will tell me if packet RX processing ever gets to the point where it's
  touching the self-linked descriptor. If there's ever enough packets to get
  to that point, BA's will be invalid and likely very unhappy.
  
  Revision  Changes    Path
  1.309     +1 -0      src/sys/dev/ath/if_ath.c
  1.2       +2 -0      src/sys/dev/ath/if_ath_sysctl.c
  1.30      +2 -1      src/sys/dev/ath/if_athioctl.h