linux-kernel - RE: [PATCH 1/3] mmc: block: ioctl: define rpmb reliable flag

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Date:   Thu, 20 Apr 2023 12:46:50 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Christian Löhle <CLoehle@...erstone.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/3] mmc: block: ioctl: define rpmb reliable flag

 
> Give a proper name to BIT 31 which is used as reliable write
> for RPMB.
> 
> Signed-off-by: Christian Loehle <cloehle@...erstone.com>
Reviewed-by: Avri Altman <avri.altman@....com>

Thanks (see nit below),
Avri

> ---
>  drivers/mmc/core/block.c       | 5 ++++-
>  include/uapi/linux/mmc/ioctl.h | 1 +
>  2 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
> index 672ab90c4b2d..16e262ddc954 100644
> --- a/drivers/mmc/core/block.c
> +++ b/drivers/mmc/core/block.c
> @@ -49,6 +49,8 @@
> 
>  #include <linux/uaccess.h>
> 
> +#include <uapi/linux/mmc/ioctl.h>
> +
>  #include "queue.h"
>  #include "block.h"
>  #include "core.h"
> @@ -538,7 +540,8 @@ static int __mmc_blk_ioctl_cmd(struct mmc_card
> *card, struct mmc_blk_data *md,
>                  * may be increased by a future standard. We just copy the
>                  * 'Reliable Write' bit here.
>                  */
> -               sbc.arg = data.blocks | (idata->ic.write_flag & BIT(31));
> +               sbc.arg = data.blocks |
> +                       (idata->ic.write_flag & MMC_RPMB_RELIABLE_WRITE);
>                 sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
>                 mrq.sbc = &sbc;
>         }
> diff --git a/include/uapi/linux/mmc/ioctl.h b/include/uapi/linux/mmc/ioctl.h
> index e7401ade6822..b2ff7f5be87b 100644
> --- a/include/uapi/linux/mmc/ioctl.h
> +++ b/include/uapi/linux/mmc/ioctl.h
> @@ -11,6 +11,7 @@ struct mmc_ioc_cmd {
>          * Bit 31 selects 'Reliable Write' for RPMB.
No longer needed.

Thanks,
Avri
>          */
>         int write_flag;
> +#define MMC_RPMB_RELIABLE_WRITE (1 << 31)
> 
>         /* Application-specific command.  true = precede with CMD55 */
>         int is_acmd;
> --
> 2.37.3
> 
> 
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