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https://github.com/AsahiLinux/u-boot
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e2a9edc0ce
To quote the author:
This series fixes an issue where the FAT type (FAT12, FAT16) is not
correctly detected, e.g. when the BPB field BS_FilSysType contains the
valid value "FAT ".
This issue occures, for example, if a partition is formatted by
swupdate using its diskformat handler. swupdate uses the FAT library
from http://elm-chan.org/fsw/ff/ internally.
See https://groups.google.com/g/swupdate/c/7Yc3NupjXx8 for a
discussion in the swupdate mailing list.
Please refer to the commit messages for more details.
1. Added bootsector checks
Most tests from https://www.win.tue.nl/~aeb/linux/fs/fat/fat-2.html
are added in the commit 'fs: fat: add bootsector validity check'.
Only the tests VIII, IX and X are not implemented.
I also checked the Linux kernel code (v6.6) and did not find any
checks on 'vistart->fs_type'. This is the reason why is skipped them
here.
See section '2. Size comparisons' for the impact on the binary size.
2. Size comparisons
I executed bloat-o-meter from the Linux kernel for an arm64
target (config xilinx_zynqmp_mini_emmc0_defconfig):
Comparison of the binary spl/u-boot-spl between master (rev
|
||
|---|---|---|
| .. | ||
| btrfs | ||
| cbfs | ||
| cramfs | ||
| erofs | ||
| ext4 | ||
| fat | ||
| jffs2 | ||
| reiserfs | ||
| sandbox | ||
| squashfs | ||
| ubifs | ||
| yaffs2 | ||
| zfs | ||
| fs.c | ||
| fs_internal.c | ||
| Kconfig | ||
| Makefile | ||
| semihostingfs.c | ||