'while' is reverse of 'until'...

src/runtime/src/rtio_mgt.rs

@@ -328,7 +328,8 @@ fn async_error_thread() {
     loop {
         unsafe {
             // replaced io.until with spinlock
-            while csr::rtio_core::async_error_read() != 0 {}
+            // could potentially put a sleep in there?
+            while csr::rtio_core::async_error_read() == 0 {}
             
             let errors = csr::rtio_core::async_error_read();
             if errors & 1 != 0 {