[Bug 26686] Some textures are distorted with libdrm 2.4.18 in GTAVC&GTA3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=26686

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #8 from Chris Wilson <chris at chris-wilson.co.uk> 2010-05-24 10:42:56 PDT ---
commit fcf3e616eeeb289f96af1436d809f0a1a42bebb7
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Mon May 24 18:35:41 2010 +0100

    intel: Don't change tiling mode unless the kernel reports success.

    Fixes:

      Bug 26686 - Some textures are distorted with libdrm 2.4.18 in GTAVC&GTA3
      http://bugs.freedesktop.org/show_bug.cgi?id=26686

    This bug continues to haunt me. The kernel SET_TILING ioctl is
    inconsistent in its return values when reporting an error. If one of its
    sanity checks fail, then the input values are left unchanged. If the
    kernel later fails to change the tiling mode, then the input values are
    modified to match the current tiling on the object. In short, userspace
    cannot trust the return values upon error and so we must assume that
    upon error our current tiling mode matches reality and not update.

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