NAND error retry does not work,

["ahgu" <ahgu@ahgu.homeunix.com>]

In case of page write failure(write.c), it calls  jffs2_reserve_space(c,
 sizeof(*ri) + datalen, &flash_ofs, &dummy, alloc_mode);
 to get a new block (new flash_ofs), but it always return the same address.

 My understanding of the logic is as follows:
 In case of write failure, it will put the whole block in the unused queue
 and get a new block. Not just a new page on the block? And copy the content
 of the bad block to the new one?

 This is the latest jffs2 version. Is that a bug?

 -Andrew



 if (!retried && alloc_mode != ALLOC_NORETRY && (raw =
> jffs2_alloc_raw_node_ref())) {
>   /* Try to reallocate space and retry */
>   uint32_t dummy;
>   struct jffs2_eraseblock *jeb = &c->blocks[flash_ofs / c->sector_size];
>
>   retried = 1;
>
>   D1(printk(KERN_DEBUG "Retrying failed write.\n"));
>
>   jffs2_dbg_acct_sanity_check(c,jeb);
>   jffs2_dbg_acct_paranoia_check(c, jeb);
>
>   if (alloc_mode == ALLOC_GC) {
>    ret = jffs2_reserve_space_gc(c, sizeof(*ri) + datalen, &flash_ofs, 
> &dummy);
>   } else {
>    /* Locking pain */
>    up(&f->sem);
>    jffs2_complete_reservation(c);
>
>    ret = jffs2_reserve_space(c, sizeof(*ri) + datalen, &flash_ofs, &dummy, 
> alloc_mode);
>    down(&f->sem);
>   }
>
>   if (!ret) {
>    D1(printk(KERN_DEBUG "Allocated space at 0x%08x to retry failed 
> write.\n", flash_ofs));
>
>    jffs2_dbg_acct_sanity_check(c,jeb);
>    jffs2_dbg_acct_paranoia_check(c, jeb);
>
>    goto retry;
>   }
>   D1(printk(KERN_DEBUG "Failed to allocate space to retry failed write: 
> %d!\n", ret));
>   jffs2_free_raw_node_ref(raw);
>  }
>  /* Release the full_dnode which is now useless, and return */
>  jffs2_free_full_dnode(fn);
>  return ERR_PTR(ret?ret:-EIO);
> }