linux-kernel - Re: [RFC/PATCH] mtd: ubi: Fix ubi free PEBs count calculation

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Message-ID: <CAFLxGvyHL2Fjk3Zvqr5Y89R7vC8wjWwUi98UESdX-Ue9h6y3pA@mail.gmail.com>
Date:	Mon, 7 Apr 2014 15:18:37 +0200
From:	Richard Weinberger <richard.weinberger@...il.com>
To:	Tanya Brokhman <tlinder@...eaurora.org>
Cc:	Artem Bityutskiy <dedekind1@...il.com>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC/PATCH] mtd: ubi: Fix ubi free PEBs count calculation

On Tue, Apr 1, 2014 at 10:02 AM, Tanya Brokhman <tlinder@...eaurora.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@...eaurora.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>

-- 
Thanks,
//richard
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