linux-kernel - Re: [PATCH v2] mmc: renesas_sdhi: register irqs before registering controller

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Message-ID: <CAPDyKFrPzLJ+bXfU-GhA5J6ybNRgAx0j7awUxd7uNbLpHhgAsQ@mail.gmail.com>
Date:   Thu, 13 Jul 2023 13:06:32 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc:     linux-renesas-soc@...r.kernel.org,
        Biju Das <biju.das.jz@...renesas.com>,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mmc: renesas_sdhi: register irqs before registering controller

On Wed, 12 Jul 2023 at 16:00, Wolfram Sang
<wsa+renesas@...g-engineering.com> wrote:
>
> IRQs should be ready to serve when we call mmc_add_host() via
> tmio_mmc_host_probe(). To achieve that, ensure that all irqs are masked
> before registering the handlers.
>
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> Tested-by: Biju Das <biju.das.jz@...renesas.com>

Applied for next and by adding a stable tag, thanks!


Kind regards
Uffe


> ---
>
> Additionally tested on a Renesas Ebisu board (R-Car E3).
>
> Changes since v1:
> * refactored setting sdcard_irq_mask_all (Thanks Geert!)
> * added tag
>
>  drivers/mmc/host/renesas_sdhi_core.c | 10 +++++++---
>  1 file changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
> index 345934e4f59e..2d5ef9c37d76 100644
> --- a/drivers/mmc/host/renesas_sdhi_core.c
> +++ b/drivers/mmc/host/renesas_sdhi_core.c
> @@ -1006,6 +1006,8 @@ int renesas_sdhi_probe(struct platform_device *pdev,
>                 host->sdcard_irq_setbit_mask = TMIO_STAT_ALWAYS_SET_27;
>                 host->sdcard_irq_mask_all = TMIO_MASK_ALL_RCAR2;
>                 host->reset = renesas_sdhi_reset;
> +       } else {
> +               host->sdcard_irq_mask_all = TMIO_MASK_ALL;
>         }
>
>         /* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
> @@ -1100,9 +1102,7 @@ int renesas_sdhi_probe(struct platform_device *pdev,
>                 host->ops.hs400_complete = renesas_sdhi_hs400_complete;
>         }
>
> -       ret = tmio_mmc_host_probe(host);
> -       if (ret < 0)
> -               goto edisclk;
> +       sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask_all);
>
>         num_irqs = platform_irq_count(pdev);
>         if (num_irqs < 0) {
> @@ -1129,6 +1129,10 @@ int renesas_sdhi_probe(struct platform_device *pdev,
>                         goto eirq;
>         }
>
> +       ret = tmio_mmc_host_probe(host);
> +       if (ret < 0)
> +               goto edisclk;
> +
>         dev_info(&pdev->dev, "%s base at %pa, max clock rate %u MHz\n",
>                  mmc_hostname(host->mmc), &res->start, host->mmc->f_max / 1000000);
>
> --
> 2.30.2
>