linux-kernel - Re: [PATCH V6 05/24] mmc: core: Add definitions for SD UHS-II cards

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Date:   Mon, 27 Feb 2023 16:29:27 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Victor Shih <victorshihgli@...il.com>
Cc:     adrian.hunter@...el.com, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, benchuanggli@...il.com,
        HL.Liu@...esyslogic.com.tw, Greg.tu@...esyslogic.com.tw,
        takahiro.akashi@...aro.org, dlunev@...omium.org,
        Victor Shih <victor.shih@...esyslogic.com.tw>,
        Jason Lai <jason.lai@...esyslogic.com.tw>
Subject: Re: [PATCH V6 05/24] mmc: core: Add definitions for SD UHS-II cards

[...]

> >
> > I think this better belongs in the struct mmc_host, please move it
> > there and then also rename it into "uhs2_app_cmd". Note that, there is
> > also one case in mmc_sd_num_wr_blocks() that sends an MMC_APP_CMD, but
> > without calling mmc_app_cmd(). This needs to be fixed.
> >
> > > +       unsigned int    power_delay_ms;         /* waiting for stable power */
> >
> > This seems to be unused, so let's drop it!
> >
>
> This power_delay_ms is used in the sd_uhs2_power_up function.
>

Correct. Although, the value isn't being set, which means it's always
0. Is that deliberate?

I realize that we are going to end up calling msleep(0) for this case,
so there is a delay being done anyway.

[...]

Kind regards
Uffe