[Yaffs] can't read chunk data tags

Hi, all:

When I copy the file to nand, the data is correct.
I have verified that by ICE.

I read the file, this file data
is wrong at the first page in every block.
the page is all zero.

In yaffs_CheckChunkBit(), when chunk is 0,
it always returns 0.

It seems the chunk mapping has problems.

Can someone help me?

Thanks in advanced.