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EmbeddedPkg/SerialDxe: Only read Serial Port if data available 

Poll the Serial Port to ensure data are available.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11730 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin 2011-06-03 09:14:16 +00:00
parent 52721ad540
commit 010bb3d2db
1 changed files with 5 additions and 3 deletions
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8
EmbeddedPkg/SerialDxe/SerialIo.c
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@ -188,10 +188,12 @@ SerialRead (
OUT VOID *Buffer OUT VOID *Buffer
) )
{ {
UINTN Count; UINTN Count = 0;
Count = SerialPortRead (Buffer, *BufferSize); if (SerialPortPoll()) {
*BufferSize = Count; Count = SerialPortRead (Buffer, *BufferSize);
*BufferSize = Count;
}
return (Count == 0) ? EFI_DEVICE_ERROR : EFI_SUCCESS; return (Count == 0) ? EFI_DEVICE_ERROR : EFI_SUCCESS;
} }