Module: Mesa
Branch: master
Commit: 0ba4320d94f23da45525699c1a3a947f2c598c3e
URL:    
http://cgit.freedesktop.org/mesa/mesa/commit/?id=0ba4320d94f23da45525699c1a3a947f2c598c3e

Author: Wladimir J. van der Laan <[email protected]>
Date:   Sat Oct 28 15:57:14 2017 +0200

etnaviv: Allow clearing constant buffer using buffer==NULL user_buffer==NULL

Prevents an assertion when using GALLIUM_HUD with ioquake3,
when cso_restore_constant_buffer_slot0 restores an empty
constant buffer in slot 0.

Signed-off-by: Wladimir J. van der Laan <[email protected]>
Signed-off-by: Lucas Stach <[email protected]>

---

 src/gallium/drivers/etnaviv/etnaviv_state.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gallium/drivers/etnaviv/etnaviv_state.c 
b/src/gallium/drivers/etnaviv/etnaviv_state.c
index 34bcb19069..ba62c5f194 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_state.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_state.c
@@ -89,7 +89,7 @@ etna_set_constant_buffer(struct pipe_context *pctx,
 
    /* Note that the state tracker can unbind constant buffers by
     * passing NULL here. */
-   if (unlikely(!cb))
+   if (unlikely(!cb || (!cb->buffer && !cb->user_buffer)))
       return;
 
    /* there is no support for ARB_uniform_buffer_object */

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