[U-Boot] [BUG] fs: fat: incorrect creation of files with Unicode file name

In the UEFI Shell I create a file with

FS0:> echo привет_мир.текст > привет_мир.текст

FS0:> ls Directory of: FS0:\ 00/00/0000 00:00 38 привет_мир.текст

The U-Boot console shows it correctly:

=> ls scsi 0:1 38 привет_мир.текст

Now in Linux I mount the volume. ls shows an incorrect filename:

ls /mnt

'пÑ'$'\302\200''ивеÑ'$'\302\202''_миÑ'$'\302\200''.Ñ'$'\302\202''екÑ'$'\302\201''Ñ'$'\302\202'

Now in Linux I create a file

# echo привет_мир.текст > /mnt/привет_мир.текст

U-Boot shows the file name incorrectly

=> ls scsi 0:1 31 ?@825B_<8@.B5:AB

So U-Boot seems not to convert file names correctly to UTF-16 before saving.

Best regards

Heinrich