i965/miptree: Add a return for updating of winsys

There is nothing particularly useful to do currently if the update
fails, but there is no point carrying on either. As a result, this has a
behavior change.

v2: Make the return type a bool (Topi)

v3: Don't leak the bo if update_winsys_renderbuffer fails. (Jason)

Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com> (v2)
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Chad Versace <chadversary@chromium.org>

src/mesa/drivers/dri/i965/brw_context.c

@@ -1504,9 +1504,12 @@ intel_process_dri2_buffer(struct brw_context *brw,
       return;
    }
 
-   intel_update_winsys_renderbuffer_miptree(brw, rb, bo,
-                                            drawable->w, drawable->h,
-                                            buffer->pitch);
+   if (!intel_update_winsys_renderbuffer_miptree(brw, rb, bo,
+                                                 drawable->w, drawable->h,
+                                                 buffer->pitch)) {
+      brw_bo_unreference(bo);
+      return;
+   }
 
    if (_mesa_is_front_buffer_drawing(fb) &&
        (buffer->attachment == __DRI_BUFFER_FRONT_LEFT ||
@@ -1562,9 +1565,10 @@ intel_update_image_buffer(struct brw_context *intel,
    if (last_mt && last_mt->bo == buffer->bo)
       return;
 
-   intel_update_winsys_renderbuffer_miptree(intel, rb, buffer->bo,
-                                            buffer->width, buffer->height,
-                                            buffer->pitch);
+   if (!intel_update_winsys_renderbuffer_miptree(intel, rb, buffer->bo,
+                                                 buffer->width, buffer->height,
+                                                 buffer->pitch))
+      return;
 
    if (_mesa_is_front_buffer_drawing(fb) &&
        buffer_type == __DRI_IMAGE_BUFFER_FRONT &&

src/mesa/drivers/dri/i965/intel_mipmap_tree.c

@@ -1112,7 +1112,7 @@ intel_miptree_create_for_dri_image(struct brw_context *brw,
  * that will contain the actual rendering (which is lazily resolved to
  * irb->singlesample_mt).
  */
-void
+bool
 intel_update_winsys_renderbuffer_miptree(struct brw_context *intel,
                                          struct intel_renderbuffer *irb,
                                          struct brw_bo *bo,
@@ -1168,12 +1168,12 @@ intel_update_winsys_renderbuffer_miptree(struct brw_context *intel,
          irb->mt = multisample_mt;
       }
    }
-   return;
+   return true;
 
 fail:
    intel_miptree_release(&irb->singlesample_mt);
    intel_miptree_release(&irb->mt);
-   return;
+   return false;
 }
 
 struct intel_mipmap_tree*

src/mesa/drivers/dri/i965/intel_mipmap_tree.h

@@ -691,7 +691,7 @@ intel_miptree_create_for_dri_image(struct brw_context *brw,
                                    __DRIimage *image,
                                    GLenum target);
 
-void
+bool
 intel_update_winsys_renderbuffer_miptree(struct brw_context *intel,
                                          struct intel_renderbuffer *irb,
                                          struct brw_bo *bo,