1 files changed, 7 insertions, 6 deletions
diff --git a/EmbeddedPkg/SerialDxe/SerialIo.c b/EmbeddedPkg/SerialDxe/SerialIo.c
index 59d904c..ef4e6a1 100644
--- a/EmbeddedPkg/SerialDxe/SerialIo.c
+++ b/EmbeddedPkg/SerialDxe/SerialIo.c
@@ -167,7 +167,7 @@ SerialWrite (
 }
 
 /**
-  Writes data to a serial device.
+  Reads data from a serial device.
 
   @param  This              Protocol instance pointer.
   @param  BufferSize        On input, the size of the Buffer. On output, the amount of
@@ -189,15 +189,16 @@ SerialRead (
   )
 {
   UINTN Count = 0;
-  
+
   if (SerialPortPoll()) {
     Count = SerialPortRead (Buffer, *BufferSize);
+  }
+
+  if (Count != *BufferSize) {
     *BufferSize = Count;
-    return (Count == 0) ? EFI_DEVICE_ERROR : EFI_SUCCESS;
+    return EFI_TIMEOUT;
   }
-  
-  // No data to return
-  *BufferSize = 0;
+
   return EFI_SUCCESS;
 }