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nvfx: reset nvfx->hw_zeta

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If nvfx_framebuffer prepare and validate were called successively with
fb->zsbuf not NULL and then NULL, nvfx->hw_zeta would contain garbage and
this would cause failures in nvfx_framebuffer_relocate/OUT_RELOC(hw_zeta).

This was triggered by piglit/texwrap 2D GL_DEPTH_COMPONENT24 and caused
first a 'write to user buffer!!' error in libdrm and then worse things.

Signed-off-by: Xavier Chantry <chantry.xavier@gmail.com>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
This commit is contained in:
Xavier Chantry
2010-11-24 21:50:36 +01:00
committed by Francisco Jerez
parent 049065cdfa
commit c14a261eb9
1 changed files with 3 additions and 1 deletions
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src/gallium/drivers/nvfx/nvfx_state_fb.c
+3 -1
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@@ -113,7 +113,9 @@ nvfx_framebuffer_validate(struct nvfx_context *nvfx, unsigned prepare_result)
nvfx->state.render_temps |= nvfx_surface_get_render_target(fb->cbufs[i], prepare_result, &nvfx->hw_rt[i]) << i;
for(; i < 4; ++i)
nvfx->hw_rt[i].bo = 0;
nvfx->hw_rt[i].bo = NULL;
nvfx->hw_zeta.bo = NULL;
if (fb->zsbuf) {
nvfx->state.render_temps |= nvfx_surface_get_render_target(fb->zsbuf, prepare_result, &nvfx->hw_zeta) << 7;