If ->sys is non-null, we might decide that it's where the data is
stored.

Signed-off-by: Ilia Mirkin <[email protected]>
Cc: <[email protected]>
---
 src/mesa/drivers/dri/nouveau/nouveau_bufferobj.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mesa/drivers/dri/nouveau/nouveau_bufferobj.c 
b/src/mesa/drivers/dri/nouveau/nouveau_bufferobj.c
index 9a3d417..2bb633e 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_bufferobj.c
+++ b/src/mesa/drivers/dri/nouveau/nouveau_bufferobj.c
@@ -86,6 +86,7 @@ nouveau_bufferobj_data(struct gl_context *ctx, GLenum target, 
GLsizeiptrARB size
        /* Free previous storage */
        nouveau_bo_ref(NULL, &nbo->bo);
        free(nbo->sys);
+       nbo->sys = NULL;
 
        if (target == GL_ELEMENT_ARRAY_BUFFER_ARB ||
            (size < 512 && usage == GL_DYNAMIC_DRAW_ARB) ||
-- 
1.8.5.5

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