EFI fat filesystem prepared by fat fs-shell tool invalid

[kallisti5]

[kallisti5@freeframe rune]$ fsck.fat  /dev/loop0p1 
fsck.fat 4.2 (2021-01-31)
There is no label in boot sector, but there is volume label 'Haiku Boot' stored in root directory
1) Copy volume label from root directory to boot sector
2) Remove volume label from root directory
[12?q]? 1

*** Filesystem was changed ***
The changes have not yet been written, you can still choose to leave the
filesystem unmodified:
1) Write changes
2) Leave filesystem unchanged
[12?q]? 1
/dev/loop0p1: 12 files, 324/16343 clusters

This isn't a problem to mount it, but rune and the fat tools can't properly detect the volume label.

[kallisti5]

before fsck:

[kallisti5@freeframe rune]$ ./target/debug/rune  -b rpi4 -i ~/Downloads/haiku-master-hrev55948-arm-mmc.image /tmp/test
[1/4] Calculating dependencies for Raspberry Pi 4 (BCM2711) media...
[2/4] Writing Haiku to "/tmp/test"...
Error: no Haiku boot partitions

after fsck repair:

[kallisti5@freeframe rune]$ ./target/debug/rune  -b rpi4 -i ~/Downloads/haiku-master-hrev55948-arm-mmc.image /tmp/test
[1/4] Calculating dependencies for Raspberry Pi 4 (BCM2711) media...
[2/4] Writing Haiku to "/tmp/test"...
[3/4] Provisioning block device... ◒[########################################] Success (0 offsets).
[4/4] Provisioning filesystem...   ◒[########################################] Success (7 files).
Success! /tmp/test is ready to boot on the Raspberry Pi 4! Enjoy Haiku!

[kallisti5]

The problem appears to be here: ​https://cgit.haiku-os.org/haiku/tree/src/add-ons/kernel/file_systems/fat/mkdos.cpp#n551

We write the volume label to the root directory, but not the boot sector of the partition.

Looking at dosfstools example here: ​https://github.com/dosfstools/dosfstools/blob/1da41f0e70dcbfb874e8191c639b91fa58205ea4/src/boot.c#L578

[kallisti5]

oh.. easy fix lol. we write "NO NAME " to the bootsector, but then give the root the actual name

[kallisti5]

​https://review.haiku-os.org/c/haiku/+/5106