Re: [PATCH] lightnvm: pblk: add lock protection to list operations

[Javier Gonzalez]

> On 28 Nov 2018, at 10.13, Hua Su <suhua.ta...@gmail.com> wrote:
> 
> Protect the list_add on the pblk_line_init_bb() error
> path in case this code is used for some other purpose
> in the future.
> 
> Signed-off-by: Hua Su <suhua.ta...@gmail.com>
> ---
> drivers/lightnvm/pblk-core.c | 13 ++++++++++---
> 1 file changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
> index 6944aac43b01..247112e1db94 100644
> --- a/drivers/lightnvm/pblk-core.c
> +++ b/drivers/lightnvm/pblk-core.c
> @@ -1295,15 +1295,22 @@ int pblk_line_recov_alloc(struct pblk *pblk, struct 
> pblk_line *line)
> 
>       ret = pblk_line_alloc_bitmaps(pblk, line);
>       if (ret)
> -             return ret;
> +             goto fail;
> 
>       if (!pblk_line_init_bb(pblk, line, 0)) {
> -             list_add(&line->list, &l_mg->free_list);
> -             return -EINTR;
> +             ret = -EINTR;
> +             goto fail;
>       }
> 
>       pblk_rl_free_lines_dec(&pblk->rl, line, true);
>       return 0;
> +
> +fail:
> +     spin_lock(&l_mg->free_lock);
> +     list_add(&line->list, &l_mg->free_list);
> +     spin_unlock(&l_mg->free_lock);
> +
> +     return ret;
> }
> 
> void pblk_line_recov_close(struct pblk *pblk, struct pblk_line *line)
> --
> 2.19.1

Looks good to me.

Reviewed-by: Javier González <jav...@cnexlabs.com>

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