linux-kernel - Re: [PATCH] mmc: card: Don't show eMMC RPMB and BOOT areas in /proc/partitions

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Date:   Wed, 4 Apr 2018 14:46:21 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Harish Jenny K N <harish_kandiga@...tor.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: card: Don't show eMMC RPMB and BOOT areas in /proc/partitions

On 27 February 2018 at 12:33, Harish Jenny K N
<harish_kandiga@...tor.com> wrote:
> From: Andrew Gabbasov <andrew_gabbasov@...tor.com>
>
> Since RPMB area is accessible via special ioctl only and boot areas
> are unlikely to contain any partitions, exclude them all from listing
> in /proc/partitions. This will hide them from various user-level
> software (e.g. fdisk), thus avoiding unnecessary access attempts.
>
> Signed-off-by: Andrew Gabbasov <andrew_gabbasov@...tor.com>
> Signed-off-by: Harish Jenny K N <harish_kandiga@...tor.com>

Queued up for 3.18, thanks!

Kind regards
Uffe

> ---
>  drivers/mmc/core/block.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
> index 20135a5..376e47e 100644
> --- a/drivers/mmc/core/block.c
> +++ b/drivers/mmc/core/block.c
> @@ -2341,7 +2341,8 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
>         set_disk_ro(md->disk, md->read_only || default_ro);
>         md->disk->flags = GENHD_FL_EXT_DEVT;
>         if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
> -               md->disk->flags |= GENHD_FL_NO_PART_SCAN;
> +               md->disk->flags |= GENHD_FL_NO_PART_SCAN
> +                                  | GENHD_FL_SUPPRESS_PARTITION_INFO;
>
>         /*
>          * As discussed on lkml, GENHD_FL_REMOVABLE should:
> --
> 1.9.1
>