[Bug 108630] [G965] piglit.spec.!opengl 1_2.tex3d-maxsize spins forever

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108630

            Bug ID: 108630
           Summary: [G965] piglit.spec.!opengl 1_2.tex3d-maxsize spins
                    forever
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Keywords: bisected, regression
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: andrey.simiklit.1989 at gmail.com
          Reporter: mark.a.janes at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

bisected to:

a9031bf9b55602d93cccef6c926e2179c23205b4
Author:     Andrii Simiklit <andrii.simiklit at globallogic.com>

i965/batch: avoid reverting batch buffer if saved state is an empty

There's no point reverting to the last saved point if that save point is
the empty batch, we will just repeat ourselves.

CC: Chris Wilson <chris at chris-wilson.co.uk>
Fixes: 3faf56ffbdeb "intel: Add an interface for saving/restoring
                     the batchbuffer state."
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107626
Reviewed-by: Jordan Justen <jordan.l.justen at intel.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>


Previously, this test failed within 3s with:
 i965: Failed to submit batchbuffer: No space left on device

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