Re: [PATCH] mmc: core: allow detection of locked cards

[Christian Loehle <christian.loehle@arm.com>]

On 5/21/24 22:04, linux-mmc@danman.eu wrote:
> From: Daniel Kucera <linux-mmc@danman.eu>
> 
> Signed-off-by: Daniel Kucera <linux-mmc@danman.eu>
> ---
>  drivers/mmc/core/sd.c | 19 ++++++++++++++++---
>  1 file changed, 16 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
> index 1c8148cdd..b22c30348 100644
> --- a/drivers/mmc/core/sd.c
> +++ b/drivers/mmc/core/sd.c
> @@ -1475,9 +1475,22 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
>  			goto free_card;
>  	}
>  
> -	err = mmc_sd_setup_card(host, card, oldcard != NULL);
> -	if (err)
> -		goto free_card;
> +        u32 card_status;
> +
> +        err = mmc_send_status(card, &card_status);
> +        if (err){
> +                pr_err("%s: unable to get card status\n",
> +                        mmc_hostname(host));
> +                goto free_card;
> +        }
> +
> +        if (card_status & R1_CARD_IS_LOCKED){
> +                pr_warn("%s: card is locked\n", mmc_hostname(host));
> +        } else {
> +                err = mmc_sd_setup_card(host, card, oldcard != NULL);
> +                if (err)
> +                        goto free_card;
> +        }
>  
>  	/*
>  	 * If the card has not been power cycled, it may still be using 1.8V

Does that work for you?
I vaguely remember adding some checks before the block device setup and some
recovery as well since the partition scan (will fail) already triggered resets.