linux-kernel - Re: [PATCH v3 62/62] mmc: f-sdh30: fix order of function calls in sdhci_f_sdh30

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Message-ID: <CAPDyKFpjPhgrn8E7WEmJeLeUVSb2es9bZRBV6WDVvMk6UR+QUA@mail.gmail.com>
Date:   Tue, 15 Aug 2023 13:32:09 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Adrian Hunter <adrian.hunter@...el.com>,
        Yangtao Li <frank.li@...o.com>
Cc:     Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 62/62] mmc: f-sdh30: fix order of function calls in sdhci_f_sdh30_remove

On Thu, 3 Aug 2023 at 07:46, Adrian Hunter <adrian.hunter@...el.com> wrote:
>
> On 27/07/23 16:55, Adrian Hunter wrote:
> > On 27/07/23 10:00, Yangtao Li wrote:
> >> The order of function calls in sdhci_f_sdh30_remove is wrong,
> >> let's call sdhci_pltfm_unregister first.
> >>
> >> Cc: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> >> Fixes: 5def5c1c15bf ("mmc: sdhci-f-sdh30: Replace with sdhci_pltfm")
> >> Signed-off-by: Yangtao Li <frank.li@...o.com>
> >> ---
> >>  drivers/mmc/host/sdhci_f_sdh30.c | 4 ++--
> >>  1 file changed, 2 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/drivers/mmc/host/sdhci_f_sdh30.c b/drivers/mmc/host/sdhci_f_sdh30.c
> >> index 840084ee72e6..964fa18a61a4 100644
> >> --- a/drivers/mmc/host/sdhci_f_sdh30.c
> >> +++ b/drivers/mmc/host/sdhci_f_sdh30.c
> >> @@ -211,11 +211,11 @@ static void sdhci_f_sdh30_remove(struct platform_device *pdev)
> >>      struct sdhci_host *host = platform_get_drvdata(pdev);
> >>      struct f_sdhost_priv *priv = sdhci_f_sdhost_priv(host);
> >>
> >> +    sdhci_pltfm_unregister(pdev);
> >
> > That also frees priv
> >
> >> +
> >>      reset_control_assert(priv->rst);
> >>      clk_disable_unprepare(priv->clk);
> >>      clk_disable_unprepare(priv->clk_iface);
> >> -
> >> -    sdhci_pltfm_unregister(pdev);
> >>  }
> >>
> >>  #ifdef CONFIG_OF
> >
>
> So it needs to end up looking something like below, right?
>
> diff --git a/drivers/mmc/host/sdhci_f_sdh30.c b/drivers/mmc/host/sdhci_f_sdh30.c
> index 840084ee72e6..47ae853f51aa 100644
> --- a/drivers/mmc/host/sdhci_f_sdh30.c
> +++ b/drivers/mmc/host/sdhci_f_sdh30.c
> @@ -210,12 +210,15 @@ static void sdhci_f_sdh30_remove(struct platform_device *pdev)
>  {
>         struct sdhci_host *host = platform_get_drvdata(pdev);
>         struct f_sdhost_priv *priv = sdhci_f_sdhost_priv(host);
> -
> -       reset_control_assert(priv->rst);
> -       clk_disable_unprepare(priv->clk);
> -       clk_disable_unprepare(priv->clk_iface);
> +       struct clk *clk_iface = priv->clk_iface;
> +       struct reset_control *rst = priv->rst;
> +       struct clk *clk = priv->clk;
>
>         sdhci_pltfm_unregister(pdev);
> +
> +       reset_control_assert(rst);
> +       clk_disable_unprepare(clk);
> +       clk_disable_unprepare(clk_iface);
>  }

I have amended the patch according to the above. Added Adrian's ack,
rebased it on top of the fixes branch, added a stable tag and applied
it for fixes.

Thanks to both of you!

Kind regards
Uffe