linux-kernel - Re: [PATCH 1/6] UBI: Fastmap: Fix memory leaks while closing the WL sub-system

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Date:	Sun, 07 Dec 2014 10:13:56 +0200
From:	Tanya Brokhman <tlinder@...eaurora.org>
To:	Richard Weinberger <richard@....at>, dedekind1@...il.com
CC:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] UBI: Fastmap: Fix memory leaks while closing the
 WL sub-system

On 11/30/2014 1:35 PM, Richard Weinberger wrote:
> Add a ubi_fastmap_close() to free all resources used by fastmap
> at WL shutdown.
>
> Signed-off-by: Richard Weinberger <richard@....at>
> ---
>   drivers/mtd/ubi/wl.c | 21 ++++++++++++++++++---
>   1 file changed, 18 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
> index c2822f7..47b215f 100644
> --- a/drivers/mtd/ubi/wl.c
> +++ b/drivers/mtd/ubi/wl.c
> @@ -2064,6 +2064,23 @@ static void protection_queue_destroy(struct ubi_device *ubi)
>   	}
>   }
>
> +static void ubi_fastmap_close(struct ubi_device *ubi)
> +{
> +#ifdef CONFIG_MTD_UBI_FASTMAP
> +	int i;
> +
> +	flush_work(&ubi->fm_work);
> +	return_unused_pool_pebs(ubi, &ubi->fm_pool);
> +	return_unused_pool_pebs(ubi, &ubi->fm_wl_pool);
> +
> +	if (ubi->fm) {
> +		for (i = 0; i < ubi->fm->used_blocks; i++)
> +			kfree(ubi->fm->e[i]);
> +	}
> +	kfree(ubi->fm);

kfree(ubi->fm_buf)?

> +#endif
> +}
> +
>   /**
>    * ubi_wl_close - close the wear-leveling sub-system.
>    * @ubi: UBI device description object
> @@ -2071,9 +2088,7 @@ static void protection_queue_destroy(struct ubi_device *ubi)
>   void ubi_wl_close(struct ubi_device *ubi)
>   {
>   	dbg_wl("close the WL sub-system");
> -#ifdef CONFIG_MTD_UBI_FASTMAP
> -	flush_work(&ubi->fm_work);
> -#endif
> +	ubi_fastmap_close(ubi);
>   	shutdown_work(ubi);
>   	protection_queue_destroy(ubi);
>   	tree_destroy(&ubi->used);
>


Thanks,
Tanya Brokhman
-- 
Qualcomm Israel, on behalf of Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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