On Wed, Dec 28, 2011 at 5:46 AM, Shashidhar hiremath
<shashidharh@xxxxxxxxxxxxxxx> wrote:
> From: Shashidhar Hiremath <shashidharh@xxxxxxxxxxxxxxx>
>
> The Patch adds a check to disable the IOCTL from running when the card is mounted
> or device is opened elsewhere.
>
> Signed-off-by: Shashidhar Hiremath <shashidharh@xxxxxxxxxxxxxxx>
> ---
> drivers/mmc/card/block.c | 6 ++++++
> 1 files changed, 6 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
> index 0cad48a..e680929 100644
> --- a/drivers/mmc/card/block.c
> +++ b/drivers/mmc/card/block.c
> @@ -387,6 +387,12 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
> err = -EINVAL;
> goto cmd_done;
> }
> + /* Disallow the IOCTL run if card is already mounted or device is
> + * opened elsewhere */
Fix multi line comment
Can refer : Documentation/kernel-doc-nano-HOWTO.txt
> + if (md->usage > 3) {
> + err = -EINVAL;
> + goto cmd_done;
> + }
>
> card = md->queue.card;
> if (IS_ERR(card)) {
> --
> 1.7.6.4
>
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