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[Timo Aaltonen <tjaalton@xxxxxxxxxx>]

Public bug reported:

commit 3a22b6f6d55a5b1e0a1c0a3d597996268ed439ad
Author: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
Date:   Wed Nov 19 15:10:05 2014 +0200

    sna: gen8 BLT broken when address has bit 4 set
    
    With bit 4 set in address, the gen8 blitter fails and blits errorneously
    into the cacheline preceeding the destination and similarly when reading from
    the source, corrupting memory.
    
    v2: Update the destination base offset pattern as revealed
        by igt/tests/gem_userptr_blits/destination-bo-align
    
    v3: Check base address as well
    
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79053

** Affects: xserver-xorg-video-intel
     Importance: Unknown
         Status: Unknown

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
     Assignee: Timo Aaltonen (tjaalton)
         Status: In Progress

** Affects: xserver-xorg-video-intel (Ubuntu Trusty)
     Importance: Undecided
         Status: New

** Affects: xserver-xorg-video-intel (Ubuntu Utopic)
     Importance: Undecided
         Status: New

** Affects: xserver-xorg-video-intel (Ubuntu Vivid)
     Importance: Undecided
     Assignee: Timo Aaltonen (tjaalton)
         Status: In Progress

** Also affects: xserver-xorg-video-intel (Ubuntu Vivid)
   Importance: Undecided
       Status: New

** Also affects: xserver-xorg-video-intel (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Also affects: xserver-xorg-video-intel (Ubuntu Utopic)
   Importance: Undecided
       Status: New

** Changed in: xserver-xorg-video-intel (Ubuntu Vivid)
       Status: New => In Progress

** Changed in: xserver-xorg-video-intel (Ubuntu Vivid)
     Assignee: (unassigned) => Timo Aaltonen (tjaalton)

** Bug watch added: freedesktop.org Bugzilla #79053
   https://bugs.freedesktop.org/show_bug.cgi?id=79053

** Also affects: xserver-xorg-video-intel via
   https://bugs.freedesktop.org/show_bug.cgi?id=79053
   Importance: Unknown
       Status: Unknown

-- 
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Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1401788

Title:
  backport BDW/CHV sna BLT fix

Status in X.org xf86-video-intel:
  Unknown
Status in xserver-xorg-video-intel package in Ubuntu:
  In Progress
Status in xserver-xorg-video-intel source package in Trusty:
  New
Status in xserver-xorg-video-intel source package in Utopic:
  New
Status in xserver-xorg-video-intel source package in Vivid:
  In Progress

Bug description:
  commit 3a22b6f6d55a5b1e0a1c0a3d597996268ed439ad
  Author: Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>
  Date:   Wed Nov 19 15:10:05 2014 +0200

      sna: gen8 BLT broken when address has bit 4 set
      
      With bit 4 set in address, the gen8 blitter fails and blits errorneously
      into the cacheline preceeding the destination and similarly when reading from
      the source, corrupting memory.
      
      v2: Update the destination base offset pattern as revealed
          by igt/tests/gem_userptr_blits/destination-bo-align
      
      v3: Check base address as well
      
      Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79053

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