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

[wesley xie]

or, may be we need to detect the buffer size in usb_stor_read, to prevent it
from "out of range" ?

On Mon, Jul 19, 2010 at 4:45 PM, wesley xie <elelonger at gmail.com> wrote:

> sorry, typo in the title, it is 4096
>
>
> On Mon, Jul 19, 2010 at 4:44 PM, wesley xie <elelonger at gmail.com> wrote:
>
>> 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
>>
>
>