linux-kernel - Re: [PATCH V1 1/2] mmc: core: Define new vendor ops to enable internal features

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Date:   Sun, 2 Apr 2023 14:48:33 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Sarthak Garg <quic_sartgarg@...cinc.com>
Cc:     adrian.hunter@...el.com, ulf.hansson@...aro.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, quic_rampraka@...cinc.com,
        quic_bhaskarv@...cinc.com, quic_sachgupt@...cinc.com,
        quic_pragalla@...cinc.com, quic_sayalil@...cinc.com,
        Brian Norris <briannorris@...omium.org>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>
Subject: Re: [PATCH V1 1/2] mmc: core: Define new vendor ops to enable
 internal features

Hi Sarthak,

thanks for your patch!

On Sat, Apr 1, 2023 at 6:57 PM Sarthak Garg <quic_sartgarg@...cinc.com> wrote:

> Define new ops to let vendor enable internal features in
> mmc_suspend/resume paths like partial init feature.
>
> Signed-off-by: Sarthak Garg <quic_sartgarg@...cinc.com>
(...)

> --- a/include/linux/mmc/host.h
> +++ b/include/linux/mmc/host.h
> @@ -212,6 +212,10 @@ struct mmc_host_ops {
>
>         /* Initialize an SD express card, mandatory for MMC_CAP2_SD_EXP. */
>         int     (*init_sd_express)(struct mmc_host *host, struct mmc_ios *ios);
> +
> +       void    (*cache_card_properties)(struct mmc_host *host);
> +       bool    (*partial_init_card)(struct mmc_host *host);

These have confusing names, first it has nothing to do with
cards since the callbacks are to the host. Second the functions
are named after usecases in a certain host rather than function.

I would just call them .suspend() and .resume(), the use
is obvious and they are called from the driver .suspend()
and .resume() hooks.

Yours,
Linus Walleij