On Mon, 22 Feb 2021 at 09:15, Seunghui Lee <sh043.lee@xxxxxxxxxxx> wrote:
>
> Some of SD cards sets permanent write protection
> due to lifespan or internal problem.
> Host can find out it's protected permanantly during initialization.
> Once set read only during initialization,
> it could prevent unnecessary write operation in it.
>
> Signed-off-by: Seunghui Lee <sh043.lee@xxxxxxxxxxx>
Applied for next and by adding a stable tag, thanks!
Kind regards
Uffe
> ---
> drivers/mmc/core/sd.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
> index 6fa51a6ed058..2c48d6504101 100644
> --- a/drivers/mmc/core/sd.c
> +++ b/drivers/mmc/core/sd.c
> @@ -135,6 +135,9 @@ static int mmc_decode_csd(struct mmc_card *card)
> csd->erase_size = UNSTUFF_BITS(resp, 39, 7) + 1;
> csd->erase_size <<= csd->write_blkbits - 9;
> }
> +
> + if (UNSTUFF_BITS(resp, 13, 1))
> + mmc_card_set_readonly(card);
> break;
> case 1:
> /*
> @@ -169,6 +172,9 @@ static int mmc_decode_csd(struct mmc_card *card)
> csd->write_blkbits = 9;
> csd->write_partial = 0;
> csd->erase_size = 1;
> +
> + if (UNSTUFF_BITS(resp, 13, 1))
> + mmc_card_set_readonly(card);
> break;
> default:
> pr_err("%s: unrecognised CSD structure version %d\n",
> --
> 2.29.0
>
