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i965/gs: Set GS prog_data to NULL if there is no GS program.

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The previous commit fixes a bug wherein we would incorrectly refer to
stale geometry shader prog_data when no geometry shader was active.

This patch reduces the likelihood of that sort of bug occurring in the
future by setting prog_data to NULL whenever there is no GS program.

Cc: mesa-stable@lists.freedesktop.org

Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
(cherry picked from commit 37bdde1087)
This commit is contained in:
Paul Berry 2013-11-25 07:49:15 -08:00 • committed by Ian Romanick
parent d963daa380
commit 756b4f9a8c
1 changed files with 7 additions and 0 deletions
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7
src/mesa/drivers/dri/i965/brw_vec4_gs.c
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@ -259,6 +259,13 @@ brw_upload_gs_prog(struct brw_context *brw)
brw->vue_map_geom_out = brw->vue_map_vs;
brw->state.dirty.brw |= BRW_NEW_VUE_MAP_GEOM_OUT;
}
/* Other state atoms had better not try to access prog_data, since
* there's no GS program.
*/
brw->gs.prog_data = NULL;
brw->gs.base.prog_data = NULL;
return;
}