Re: ubi_update_fastmap: could not find an early PEB

[Richard Weinberger <richard@nod.at>]

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Hi!

Am 22.06.2012 19:26, schrieb Nikita V. Youshchenko:
> Where to get that?

git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubi2.git ubi2/v12

In the meanwhile I had the chance to look closer at the issue.
The previously posted patch my help, but cannot help in all cases.
It can happen that a freshly created anchor (aka early) PEB will immediately
go into a fastmap pool, such that it cannot be used as fastmap super block.
I'll present a solution next week.

v12 has another issue.
If your flash contains bad PEBs the following WARN_ON() in fastmap.c will
spuriously trigger:

        /*
         * If fastmap is leaking PEBs (must not happen), raise a
         * fat warning and fall back to scanning mode.
         * We do this here because in ubi_wl_init() it's too late
         * and we cannot fall back to scanning.
         */
        if (WARN_ON(self_check_fastmap(ai) != ubi->peb_count -
                    ubi->bad_peb_count - used_blocks)) {
                ret = UBI_BAD_FASTMAP;
                kfree(fm);
                goto free_hdr;
        }


Instead of ubi->bad_peb_count it has to be ai->bad_peb_count.

Thanks,
//richard


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