Handling of write failure on NAND

[ahgu]

Does JFFS2 have support on write failure handling for NAND flash. When a 
write or verification after write fails, does it find a new block and copy 
all data into the new block, and mark the original block as bad block? I 
only see that the bad_list is used during scanning and erase. I saw someone 
added a retry in the write function, but that is just writing to the same 
block. The ofs returned by jffs2_reserve_space stays the same.

It is calling the BUGS() and halt the kernel when the write fails.

-Andrew