[U-Boot] [U-BOOT] operate on a udisk with fat32 fs, and 2048 block size will cause system to restart

[wesley xie]

I have a udisk(My MP3), which is fat32 format, and the fs block size is
4096(report by u-boot).

enable USB and FAT support for u-boot.

do "usb start" cause the system to restart. after looking into the u-boot
code,  I find that the "DEFAULT_SECTOR_SIZE" in disk/part_dos.h is too
small(512) to fit a fat sector, so system run into a "out of range" trouble
when it go into usb_storage.c/usb_stor_read() function.

and I also need to change the "FS_BLOCK_SIZE" in include/fat.h to 4096,
otherwise, the "fatinfo/fatls/fatread" would run into the same trouble.

These is also check in u-boot-2010.06 code.

The FAT doc say the number of bytes per sector will be one of 512 , 1024,
2048, 4096, so i guess that I may need to use something like "malloc" to
alloc the sector buffer ? But it seems difficult to do.

Any idea ?

Thanks.

/WX