DragonFly- master sys/dev/disk/ahci ahci_cam.c atascsi.h

Matthew Dillon dillon at crater.dragonflybsd.org
Fri Jun 5 22:12:31 PDT 2009

commit 669fbbf7b5b168ecb7f843bff5909f6ccd9a8f91
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Fri Jun 5 22:11:38 2009 -0700

    AHCI - Add conditional logic for wcache and rahead, enhanced reporting, fixes
    * Do not enable the write cache if the ident info says it is already enabled.
    * Do not enable read-ahead if the ident info says it is already enabled.
    * Do not try to set the freeze lock if the security feature is not supported.
    * Enhanced error reporting.
    * Report wcache and rahead state in the Ident.
    NOTE: "WD My Book" ESATA consumer devices generate a fatal interface error
          when presented with ATA_C_SET_FEATURES.  The above code will quietly
          work around the problem.  The bug is likely in the My Book daughter

Summary of changes:
 sys/dev/disk/ahci/ahci_cam.c |   66 ++++++++++++++++++++++++++++++++---------
 sys/dev/disk/ahci/atascsi.h  |    1 +
 2 files changed, 52 insertions(+), 15 deletions(-)


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