diff --git a/gpu/src/Interface.zig b/gpu/src/Interface.zig
index d34204b4..3e2ff07e 100644
--- a/gpu/src/Interface.zig
+++ b/gpu/src/Interface.zig
@@ -36,7 +36,7 @@ pub const RequestAdapterOptions = struct {
     force_fallback_adapter: bool = false,
 
     /// Only respected by native WebGPU implementations.
-    compatible_surface: ?Surface,
+    compatible_surface: ?Surface = null,
 };
 
 pub const RequestAdapterErrorCode = error{
@@ -81,18 +81,6 @@ pub fn requestAdapter(interface: Interface, options: *const RequestAdapterOption
     const f = @asyncCall(frame_buffer, &result, interface.vtable.requestAdapter, .{ interface.ptr, options });
     resume f;
     return result;
-
-    // @asyncCall(frame_buffer: []align(@alignOf(@Frame(anyAsyncFunction))) u8, result_ptr, function_ptr, args: anytype) anyframe->T
-
-    // var data: i32 = 1;
-    // const Foo = struct {
-    //     bar: fn (*i32) callconv(.Async) void,
-    // };
-    // var foo = Foo{ .bar = func };
-    // var bytes: [64]u8 align(@alignOf(@Frame(func))) = undefined;
-    // const f = @asyncCall(&bytes, {}, foo.bar, .{&data});
-
-    // return async interface.vtable.requestAdapter(interface.ptr, options);
 }
 
 test "syntax" {
diff --git a/gpu/src/NativeInstance.zig b/gpu/src/NativeInstance.zig
index 0aef01f4..9f5399f1 100644
--- a/gpu/src/NativeInstance.zig
+++ b/gpu/src/NativeInstance.zig
@@ -74,6 +74,7 @@ const interface_vtable = Interface.VTable{
             // TODO: Once crbug.com/dawn/1122 is fixed, we should process events here otherwise our
             // callback will not be invoked.
             // c.wgpuInstanceProcessEvents(native.instance)
+            suspend {} // must suspend so that async caller can resume
 
             // Return the response, asserting the callback has executed at this point.
             const resp = native.request_adapter_response.?;
@@ -97,7 +98,6 @@ const interface_vtable = Interface.VTable{
 
 /// Returns the gpu.Interface for interacting with this native instance.
 pub fn interface(native: *NativeInstance) Interface {
-    std.debug.assert(@alignOf(@Frame(interface_vtable.requestAdapter)) == 16);
     return .{
         .ptr = native,
         .vtable = &interface_vtable,