[RFC/PATCH] mtd: ubi: Fix ubi free PEBs count calculation

[Richard Weinberger]

On Tue, Apr 1, 2014 at 10:02 AM, Tanya Brokhman <tlinder at codeaurora.org> wrote:
> The ubi->free_count should be updated with every insert/remove to/from
> the ubi->free list.
>
> Signed-off-by: Tanya Brokhman <tlinder at codeaurora.org>
>
> diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
> index 9a36f78..ca74d19 100644
> --- a/drivers/mtd/ubi/wl.c
> +++ b/drivers/mtd/ubi/wl.c
> @@ -690,6 +690,8 @@ static struct ubi_wl_entry *get_peb_for_wl(struct ubi_device *ubi)
>
>         e = find_wl_entry(ubi, &ubi->free, WL_FREE_MAX_DIFF);
>         self_check_in_wl_tree(ubi, e, &ubi->free);
> +       ubi->free_count--;
> +       ubi_assert(ubi->free_count >= 0);
>         rb_erase(&e->u.rb, &ubi->free);
>
>         return e;
> @@ -1090,6 +1092,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
>
>                         /* Give the unused PEB back */
>                         wl_tree_add(e2, &ubi->free);
> +                       ubi->free_count++;
>                         goto out_cancel;
>                 }
>                 self_check_in_wl_tree(ubi, e1, &ubi->used);
> --

Acked-by: Richard Weinberger <richard at nod.at>

-- 
Thanks,
//richard