renderer: reset decode contexts in two stages

reset the non-0 contexts first, then kill resource
table, then nuke the 0 context.

src/vrend_decode.c

@@ -1160,11 +1160,13 @@ void vrend_decode_block(uint32_t ctx_id, uint32_t *block, int ndw)
 
 }
 
-void vrend_decode_reset(void)
+void vrend_decode_reset(bool ctx_0_only)
 {
    int i;
 
    vrend_hw_switch_context(dec_ctx[0]->grctx, TRUE);
+
+   if (ctx_0_only == false) {
      for (i = 1; i < VREND_MAX_CTX; i++) {
        if (!dec_ctx[i])
          continue;
@@ -1174,8 +1176,11 @@ void vrend_decode_reset(void)
 
        vrend_destroy_context(dec_ctx[i]->grctx);
        free(dec_ctx[i]);
+       dec_ctx[i] = NULL;
      }
-
+   } else {
      vrend_destroy_context(dec_ctx[0]->grctx);
      free(dec_ctx[0]);
+     dec_ctx[0] = NULL;
+   }
 }

src/vrend_renderer.c

@@ -3179,9 +3179,9 @@ vrend_renderer_fini(void)
    if (!inited)
       return;
 
-   vrend_renderer_force_ctx_0();
+   vrend_decode_reset(false);
    vrend_object_fini_resource_table();
-   vrend_decode_reset();
+   vrend_decode_reset(true);
 
    inited = 0;
 }
@@ -5508,9 +5508,9 @@ static void vrend_reset_fences(void)
 void vrend_renderer_reset(void)
 {
    vrend_reset_fences();
-   vrend_decode_reset();
+   vrend_decode_reset(false);
    vrend_object_fini_resource_table();
-
+   vrend_decode_reset(true);
    vrend_object_init_resource_table();
    vrend_state.viewport_dirty = vrend_state.scissor_dirty = TRUE;
    vrend_state.program_id = (GLuint)-1;

src/vrend_renderer.h

@@ -383,7 +383,7 @@ void vrend_renderer_blit_gl(struct vrend_context *ctx,
                             const struct pipe_blit_info *info);
 
 void vrend_renderer_reset(void);
-void vrend_decode_reset(void);
+void vrend_decode_reset(bool ctx_0_only);
 #define VREND_GL_VER_MAJOR 3
 #define VREND_GL_VER_MINOR 1