On 17/11/22 12:51, Christian Löhle wrote:
> Clean up the MMC_TRIM_ARGS define that became ambiguous with
> DISCARD introduction.
> While at it fix one usage where MMC_TRIM_ARGS falsely included
> DISCARD, too.
>
> Fixes: b3bf915308ca ("mmc: core: new discard feature support at eMMC v4.5")
>
A blank line is unusual here
> Signed-off-by: Christian Loehle <cloehle@xxxxxxxxxxxxxx>
One nitpick below otherwise:
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> Previously submitted as mmc: core: Do not require secure trim for discard
> drivers/mmc/core/core.c | 10 ++++++++--
> include/linux/mmc/mmc.h | 2 +-
> 2 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 95fa8fb1d45f..7ce26dbd5879 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -1478,6 +1478,11 @@ void mmc_init_erase(struct mmc_card *card)
> card->pref_erase = 0;
> }
>
> +static bool is_trim_arg(unsigned int arg)
> +{
> + return (arg & MMC_TRIM_OR_DISCARD_ARGS) && arg != MMC_DISCARD_ARG;
> +}
> +
> static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card,
> unsigned int arg, unsigned int qty)
> {
> @@ -1760,7 +1765,7 @@ int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
> !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN))
> return -EOPNOTSUPP;
>
> - if (mmc_card_mmc(card) && (arg & MMC_TRIM_ARGS) &&
> + if (mmc_card_mmc(card) && is_trim_arg(arg) &&
> !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN))
> return -EOPNOTSUPP;
>
> @@ -1790,7 +1795,8 @@ int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
> * identified by the card->eg_boundary flag.
> */
> rem = card->erase_size - (from % card->erase_size);
> - if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) {
> + if ((arg & MMC_TRIM_OR_DISCARD_ARGS) && (card->eg_boundary) &&
> + (nr > rem)) {
Parenthesis are not needed around "card->eg_boundary)" nor "nr > rem"
If you take them out, then the line doesn't need wrapping either.
> err = mmc_do_erase(card, from, from + rem - 1, arg);
> from += rem;
> if ((err) || (to <= from))
> diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h
> index 9c50bc40f8ff..6f7993803ee7 100644
> --- a/include/linux/mmc/mmc.h
> +++ b/include/linux/mmc/mmc.h
> @@ -451,7 +451,7 @@ static inline bool mmc_ready_for_data(u32 status)
> #define MMC_SECURE_TRIM1_ARG 0x80000001
> #define MMC_SECURE_TRIM2_ARG 0x80008000
> #define MMC_SECURE_ARGS 0x80000000
> -#define MMC_TRIM_ARGS 0x00008001
> +#define MMC_TRIM_OR_DISCARD_ARGS 0x00008003
>
> #define mmc_driver_type_mask(n) (1 << (n))
>
