git: DragonFly_RELEASE_2_8 nata - properly teardown interrupts on ENXIO

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx>]

commit f84b6523c9856679a830769a159e6ba0d7627c32
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date:   Thu Oct 28 23:23:48 2010 -0700

    nata - properly teardown interrupts on ENXIO
    
    * When a ata controller cannot be attached (e.g. due to AHCI having
      already taken its resources) be sure to teardown and release any
      resources that had been obtained.
    
    * This fixes a panic on certain motherboards (e.g. gigabyte / phenomX6)
      where the ata controller ENXIO'd but left interrupt handlers setup.
      An interrupt would then occur, access stale memory, and blow the machine
      up.

Summary of changes:
 sys/dev/disk/nata/ata-chipset.c |   43 +++++++++++++++++++++++++++++++++-----
 sys/dev/disk/nata/ata-pci.c     |    9 ++++++-
 2 files changed, 44 insertions(+), 8 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/f84b6523c9856679a830769a159e6ba0d7627c32


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