Fix the Iron Lake "Lost Interrupt" bug

[Steve Conklin]

An upstream patch exists to fix a bug which causes lost interrupts on the Iron Lake platform.

SRU Justification:

Impact: The interrupt handler for the Ironlake hardware is called with the master interrupt control bit disabled. This prevents any other interrupts which the code taken from older hw tries to handle. Not only this is unneeded, this also effects stability of platforms with Iron Lake hardware as interrupts get lost.

Fix: Patch taken from upstream and modified slightly to apply to Karmic.

[Stefan Bader (smb)]

For Lucid this has been seen scheduled to be in 2.6.32.5.

[Stefan Bader (smb)]

Accepted linux into karmic-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 2.6.31-20.57

---------------
linux (2.6.31-20.57) karmic-proposed; urgency=low

  [ Kees Cook ]

  * SAUCE: x86: brk away from exec rand area
    - LP: #452175

  [ Keng-Yu Lin ]

  * SAUCE: (drop after 2.6.31) input: Add hotkey quirk for Samsung
    Q210/P210 laptops
    - LP: #385683

  [ Pascal Bach ]

  * SAUCE: (drop after 2.6.31) input: Add hotkey quirk for Fujitsu Amilo
    1848+u
    - LP: #458503

  [ Stefan Bader ]

  * Revert "[Upstream] (drop after 2.6.31) acerhdf: fix fan control for
    AOA150 model"
    - LP: #494633
  * [Config] Disable CONFIG_USB_DEVICEFS
    - LP: #488274

  [ Upstream Kernel Changes ]

  * Revert "ext4: Don't update superblock write time when filesystem is
    read-only"
    - LP: #496816
  * Revert "ide: try to use PIO Mode 0 during probe if possible"
    - LP: #503430
  * Revert "isdn: isdn_ppp: Use SKB list facilities instead of home-grown
    implementation."
    - LP: #503430
  * nilfs2: fix kernel oops in error case of nilfs_ioctl_move_blocks
    - LP: #494633
  * cifs: don't use CIFSGetSrvInodeNumber in is_path_accessible
    - LP: #494633
  * cifs: clean up handling when server doesn't consistently support inode
    numbers
    - LP: #494633
  * cifs: clear server inode number flag while autodisabling
    - LP: #494633
  * CIFS: fix oops in cifs_lookup during net boot
    - LP: #494633
  * CIFS: Duplicate data on appending to some Samba servers
    - LP: #494633
  * rtl8187: Fix kernel oops when device is removed when LEDS enabled
    - LP: #494633
  * md: don't clear endpoint for resync when resync is interrupted.
    - LP: #494633
  * md/raid5: make sure curr_sync_completes is uptodate when reshape starts
    - LP: #494633
  * md/raid1/raid10: add a cond_resched
    - LP: #494633
  * ALSA: usb-audio: fix combine_word problem
    - LP: #494633
  * ALSA: hda - Dell Studio 1557 hd-audio quirk
    - LP: #494633
  * ALSA: AACI: fix AC97 multiple-open bug
    - LP: #494633
  * ALSA: AACI: fix recording bug
    - LP: #494633
  * jffs2: Fix memory corruption in jffs2_read_inode_range()
    - LP: #494633
  * sound: rawmidi: disable active-sensing-on-close by default
    - LP: #494633
  * sound: rawmidi: fix checking of O_APPEND when opening MIDI device
    - LP: #494633
  * sound: rawmidi: fix double init when opening MIDI device with O_APPEND
    - LP: #494633
  * sound: rawmidi: fix MIDI device O_APPEND error handling
    - LP: #494633
  * highmem: Fix race in debug_kmap_atomic() which could cause warn_count
    to underflow
    - LP: #494633
  * highmem: Fix debug_kmap_atomic() to also handle KM_IRQ_PTE, KM_NMI, and
    KM_NMI_PTE
    - LP: #494633
  * powerpc: Fix DEBUG_HIGHMEM build break from d4515646699
    - LP: #494633
  * kmap: fix build errors with DEBUG_HIGHMEM enabled
    - LP: #494633
  * V4L/DVB (13169): bttv: Fix potential out-of-order field processing
    - LP: #494633
  * V4L/DVB (13170): bttv: Fix reversed polarity error when switching video
    standard
    - LP: #494633
  * V4L/DVB (13109): tda18271: fix signedness issue in
    tda18271_rf_tracking_filters_init
    - LP: #494633
  * V4L/DVB (13107): tda18271: fix overflow in FM radio frequency...

[Steve Conklin (sconklin)]

This fix made it into Lucid from upstream