cvs commit: src/sys/pci if_rl.c

[Ruslan Ermilov]

ru          2004/04/02 16:42:33 PST

  FreeBSD src repository

  Modified files:
    sys/pci              if_rl.c 
  Log:
  Fixed a few bugs in the rl(4) driver:
  
  Under polling(4), we counted non-existent output packets and wasted
  CPU cycles, corrected.  (PR kern/64975.)
  
  The fix in revision 1.71 to correct resetting of the watchdog timer
  was wrong.
  
  In rl(4), the TX list does not have a gap between the consumer and
  producer, so the "empty TX list" test was wrong, corrected.
  
  Also, resetting the timer to five each time we know there is still
  some TX work to do was a bad idea -- under polling(4), if the chip
  goes out to lunch, this results in the watchdog routine to _never_
  be called.  Instead, let the timer downgrade to zero and fire the
  watchdog, then reset it to five when it is zero AND there is some
  TX work left.  (Most other network drivers need this fix too.)
  
  MFC after:      3 days
  
  Revision  Changes    Path
  1.134     +10 -8     src/sys/pci/if_rl.c