From f65dc3bebd97e5b9951fa44bb6365275f7f00791 Mon Sep 17 00:00:00 2001
From: andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Wed, 8 Jun 2011 21:12:11 +0000
Subject: Fix bug in SerialRead returning error if no data was present.

No data should not be an error return. Causing lots of REPORT_STATUS_CODE messages out of the TerminalDxe driver.

Signed-off-by: andrewfish
Reviewed-by: andrewfish



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11770 6f19259b-4bc3-4df7-8a09-765794883524
---
 EmbeddedPkg/SerialDxe/SerialIo.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'EmbeddedPkg/SerialDxe')

diff --git a/EmbeddedPkg/SerialDxe/SerialIo.c b/EmbeddedPkg/SerialDxe/SerialIo.c
index b9ea4b9c42..fe0b1711a8 100644
--- a/EmbeddedPkg/SerialDxe/SerialIo.c
+++ b/EmbeddedPkg/SerialDxe/SerialIo.c
@@ -193,8 +193,12 @@ SerialRead (
   if (SerialPortPoll()) {
     Count = SerialPortRead (Buffer, *BufferSize);
     *BufferSize = Count;
+    return (Count == 0) ? EFI_DEVICE_ERROR : EFI_SUCCESS;
   }
-  return (Count == 0) ? EFI_DEVICE_ERROR : EFI_SUCCESS;
+  
+  // No data to return
+  *BufferSize = 0;
+  return EFI_SUCCESS;
 }
 
 
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