[Bug 98923] Texture size changes after updating texture with TexSubImage3D from pixel buffer

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98923

            Bug ID: 98923
           Summary: Texture size changes after updating texture with
                    TexSubImage3D from pixel buffer
           Product: Mesa
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: qiankun.miao at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org
                CC: kenneth at whitecape.org, yang.gu at intel.com

TexSubImage3D is buggy when updating texture data from pixel buffer on Linux +
Mesa + Skylake. Size of the texture changes after updating data with
TexSubImage3D from pixel buffer.
Steps to reproduce:
1. download chrome from https://www.google.com/chrome/browser/desktop/ or use
latest chrome in your linux distribution
2. un chrome --enable-unsafe-es3-apis --ignore-gpu-blacklist 
3. open url:
https://www.khronos.org/registry/webgl/sdk/tests/conformance2/textures/misc/tex-subimage3d-pixel-buffer-bug.html?webglVersion=2
4. All tests should pass.
5. You will see failure in the page.

This happens on Linux with Mesa 11.0 and 13.0, not on other GPU vendor or
Windows and Mac.

Also see chrome bug:
https://bugs.chromium.org/p/chromium/issues/detail?id=666384

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