[Bug 78770] [SNB bisected]Webglc conformance/textures/texture-size-limit.html fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78770

--- Comment #27 from Chad Versace <chad.versace at linux.intel.com> ---
Kalyan and Tapani confirmed that my patch fixes the test on 64-bit Sandybridge.
I confirmed the fix on 64-bit Ivybridge.

Still waiting for a QA update on 32-bit Sandybridge with a modern Chromium.

Patch is committed to Mesa master as

commit b69c7c5dac4e2615e89cef773173484421830a8f
Author: Chad Versace <chad.versace at linux.intel.com>
Date:   Tue Nov 18 15:41:35 2014 -0800

    i965: Fix segfault in WebGL Conformance on Ivybridge

    Fixes regression of WebGL Conformance test texture-size-limit [1] on
    Ivybridge Mobile GT2 0x0166 with Google Chrome R38.

    Regression introduced by

        commit 6c044231535b93c5d16404528946cad618d96bd9
        Author: Kenneth Graunke <kenneth at whitecape.org>
        Date:   Sun Feb 2 02:58:42 2014 -0800

            i965: Bump GL_MAX_CUBE_MAP_TEXTURE_SIZE to 8192.

    The test regressed because the pointer offset arithmetic in
    intel_miptree_map_gtt() overflows for large textures. The pointer
    arithmetic is not 64-bit safe.

    [1]
https://github.com/KhronosGroup/WebGL/blob/52f0dc240f04dce31b1b8e2b8107fe2b8332dc90/sdk/tests/conformance/textures/texture-size-limit.html

    Cc: "10.3 10.4" <mesa-stable at lists.freedesktop.org>
    Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=78770
    Fixes: Intel CHRMOS-1377
    Reported-by: Lu Hua <huax.lu at intel.com>
    Reviewed-by: Ian Romanic <ian.d.romanick at intel.com>
    Signed-off-by: Chad Versace <chad.versace at linux.intel.com>

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