u_blitter: let the driver check whether there's a recursion

src/gallium/auxiliary/util/u_blitter.c

@@ -104,8 +104,6 @@ struct blitter_context_priv
    /* Destination surface dimensions. */
    unsigned dst_width;
    unsigned dst_height;
-
-   boolean running;
 };
 
 static void blitter_draw_rectangle(struct blitter_context *blitter,
@@ -269,11 +267,11 @@ void util_blitter_destroy(struct blitter_context *blitter)
 
 static void blitter_check_saved_CSOs(struct blitter_context_priv *ctx)
 {
-   if (ctx->running) {
+   if (ctx->base.running) {
       _debug_printf("u_blitter: Caught recursion on save. "
                     "This is a driver bug.\n");
    }
-   ctx->running = TRUE;
+   ctx->base.running = TRUE;
 
    /* make sure these CSOs have been saved */
    assert(ctx->base.saved_blend_state != INVALID_PTR &&
@@ -349,11 +347,11 @@ static void blitter_restore_CSOs(struct blitter_context_priv *ctx)
       ctx->base.saved_num_vertex_buffers = ~0;
    }
 
-   if (!ctx->running) {
+   if (!ctx->base.running) {
       _debug_printf("u_blitter: Caught recursion on restore. "
                     "This is a driver bug.\n");
    }
-   ctx->running = FALSE;
+   ctx->base.running = FALSE;
 }
 
 static void blitter_set_rectangle(struct blitter_context_priv *ctx,
@@ -775,8 +773,10 @@ void util_blitter_copy_region(struct blitter_context *blitter,
                                     dst->nr_samples, bind, 0) ||
        !screen->is_format_supported(screen, src->format, src->target,
                                     src->nr_samples, PIPE_BIND_SAMPLER_VIEW, 0)) {
+      ctx->base.running = TRUE;
       util_resource_copy_region(pipe, dst, dstlevel, dstx, dsty, dstz,
                                 src, srclevel, srcbox);
+      ctx->base.running = FALSE;
       return;
    }
 

src/gallium/auxiliary/util/u_blitter.h

@@ -79,6 +79,9 @@ struct blitter_context
                           enum blitter_attrib_type type,
                           const float attrib[4]);
 
+   /* Whether the blitter is running. */
+   boolean running;
+
    /* Private members, really. */
    struct pipe_context *pipe; /**< pipe context */