From owner-cvs-all  Tue Mar 23  2:23:18 1999
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From: Bruce Evans <bde@FreeBSD.org>
Date: Tue, 23 Mar 1999 02:22:21 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/i386/isa wd.c
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bde         1999/03/23 02:22:21 PST

  Modified files:
    sys/i386/isa         wd.c 
  Log:
  Fixed a couple of missing drive selects in wdreset().  This mainly
  affects cases where there is a slave but no master.  These bugs
  were usually recovered from provided ATAPI was configured, but only
  after lengthy delays.  Configuring ATAPI still fixes some bugs for
  non-atapi drives.
  
  Don't wait for seek complete in wdreset().  If necessary for pre-ata
  drives, it can be waited for later (we got it wrong by only looking
  at it for drive 0 anyway).  It is set as part of a historical
  signature for ata drives but doesn't say anything useful about the
  reset state.  It is cleared as part of a non-historical signature
  for atapi drives so that drivers which don't understand atapi drives
  seem to see no drive.  Waiting for it caused lengthy delays and
  broke the status returned by wdreset() in cases where the master
  was not an ata drive.  Then the whole wdprobe() failed in some
  cases where the recovery code didn't work.
  
  Don't wait for drive ready in wdreset().  The considerations are
  the same as for seek complete, except drive ready does say something
  useful about the reset state of ata drives, and waiting for it
  later is required anyway for such drives.
  
  Lengthy delays can now be avoided by not configuring nonexistent
  (ata) drives.  Unfortunately, this breaks detection of atapi drives
  in some configurations.
  
  Revision  Changes    Path
  1.190     +4 -2      src/sys/i386/isa/wd.c


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