libplatsupport/odroidc2: report rx empty

Signed-off-by: Axel Heider <[email protected]>
axel-h · Mar 11, 2024 · a24fd9a · a24fd9a
1 parent 19c5299
commit a24fd9a
Showing 1 changed file with 2 additions and 3 deletions.
diff --git a/libplatsupport/src/plat/odroidc2/serial.c b/libplatsupport/src/plat/odroidc2/serial.c
@@ -63,9 +63,8 @@ int uart_getchar(ps_chardevice_t *dev)
 {
     void* reg_base = dev->vaddr;
 
-    /* this can potentially block forever if nobody sends anything. */
-    while (internal_uart_is_rx_empty(reg_base) {
-        /* busy waiting loop */
+    if (internal_uart_is_rx_empty(reg_base) {
+        return -1;
     }
 
     return internal_uart_rx_byte(reg_base);