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From: Pyun YongHyeon <yongari@FreeBSD.org>
Date: Thu, 2 Dec 2010 03:53:29 +0000 (UTC)
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Subject: cvs commit: src/sys/dev/fxp if_fxp.c
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yongari     2010-12-02 03:53:29 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/fxp          if_fxp.c 
  Log:
  SVN rev 216111 on 2010-12-02 03:53:29Z by yongari
  
  If RX lockup workaround is enabled, fxp(4) will periodically reset
  the controller to workaround silicon bug of i82557. Each reset will
  re-establish link which in turn triggers MII status change
  callback. The callback will try to reconfigure controller if the
  controller is not i82557 to enable flow-control. This caused
  endless link UP/DOWN when the workaround was enabled on non-i82557
  controller.
  
  To fix the issue, apply RX lockup workaround only for i82557.
  Previously it blindly checked undocumented EEPROM location such
  that it sometimes enabled the workaround for other controllers. At
  this time, only i82557 is known to have the silicon bug.
  This fixes a regression introduced in r215906 which enabled flow
  control support for all controllers except i82557.
  
  Reported by:    Karl Denninger (karl <> denninger dot net)
  Tested by:      Karl Denninger (karl <> denninger dot net)
  MFC after:      3 days
  
  Revision  Changes    Path
  1.311     +6 -4      src/sys/dev/fxp/if_fxp.c