[Bug 98025] [radeonsi] incorrect primitive restart index used

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98025

            Bug ID: 98025
           Summary: [radeonsi] incorrect primitive restart index used
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: jlegg at feralinteractive.com
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 126961
  --> https://bugs.freedesktop.org/attachment.cgi?id=126961&action=edit
Apitrace reproducing the issue

With radeonsi, If primitive restart is enabled for two consecutive draws which
use different primitive restart indices, then the first draw's primitive
restart index is incorrectly used for the second draw.

The attached apitrace reproduces the issue. The first and second draws should
draw the same thing. The first is using a primitive restart index of
0xFFFFFFFF, and the second is using 0xFFFF (these are set using fixed index
primitive restart and different index types).

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