OVMF: cross-filesystem copy broken? ("The source and destination are the same")

[Bruce Cran <bruce@cran.org.uk>]

I don't know if this is a known issue, but it appears that 
cross-filesystem copies no longer work. I'm running OVMF X64 built from 
git commit a0426207c133bdf40c42561f26c20c4b3114d8f9.  I've tried copying 
between filesystems in various ways - with the current directory being 
fs0, fs1, specifying the destination as the current directory, a empty 
directory or a filename. It always results in the same error:

FS0:\efi\ubuntu\> cp grubx64.efi fs1:\

cp: The source and destination are the same.


I built OVMF with: `./OvmfPkg/build.sh -a X64 -t GCC49 -b NOOPT -D 
DEBUG_ON_SERIAL_PORT=TRUE` and am running OVMF with:


qemu-system-x86_64 -name uefi -M q35 -m size=16G -cpu host -enable-kvm \
   -drive 
if=pflash,format=raw,file=workspace/edk2/Build/OvmfX64/NOOPT_GCC49/FV/OVMF.fd 
-serial pty \
   -nodefaults -s -rtc base=utc -monitor stdio --usbdevice tablet \
   -vga qxl  -sdl                                       \
   -device vfio-pci,host=01:00.0,id=iodrive,rombar=0 \
   -drive file=uefi.img,if=ide,media=disk,id=disk,format=raw \
   -drive file=uefi_tmp.img,if=ide,media=disk,id=disk1,format=raw


-- 
Bruce