linux-kernel - Re: [PATCH 06/11] mmc: core: Clarify that the ->ack_sdio

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Date:   Thu, 5 Sep 2019 10:33:54 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     linux-mmc@...r.kernel.org, Adrian Hunter <adrian.hunter@...el.com>,
        Douglas Anderson <dianders@...omium.org>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Yong Mao <yong.mao@...iatek.com>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/11] mmc: core: Clarify that the ->ack_sdio_irq()
 callback is mandatory

On Tue, Sep 03, 2019 at 04:22:02PM +0200, Ulf Hansson wrote:
> For the MMC_CAP2_SDIO_IRQ_NOTHREAD case and when using sdio_signal_irq(),
> the ->ack_sdio_irq() is already mandatory, which was not the case for those
> host drivers that called sdio_run_irqs() directly.
> 
> As there are no longer any drivers calling sdio_run_irqs(), let's clarify
> the code by dropping the unnecessary check and explicitly state that the
> callback is mandatory in the header file.
> 
> Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
> ---
>  drivers/mmc/core/sdio_irq.c | 3 +--
>  include/linux/mmc/host.h    | 1 +
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
> index 0962a4357d54..d7965b53a6d2 100644
> --- a/drivers/mmc/core/sdio_irq.c
> +++ b/drivers/mmc/core/sdio_irq.c
> @@ -115,8 +115,7 @@ static void sdio_run_irqs(struct mmc_host *host)
>  	mmc_claim_host(host);
>  	if (host->sdio_irqs) {
>  		process_sdio_pending_irqs(host);
> -		if (host->ops->ack_sdio_irq)
> -			host->ops->ack_sdio_irq(host);
> +		host->ops->ack_sdio_irq(host);
>  	}
>  	mmc_release_host(host);
>  }
> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
> index 0c0a565c7ff1..ecdc1b0b1313 100644
> --- a/include/linux/mmc/host.h
> +++ b/include/linux/mmc/host.h
> @@ -128,6 +128,7 @@ struct mmc_host_ops {
>  	int	(*get_cd)(struct mmc_host *host);
>  
>  	void	(*enable_sdio_irq)(struct mmc_host *host, int enable);
> +	/* Mandatory callback when using MMC_CAP2_SDIO_IRQ_NOTHREAD. */
>  	void	(*ack_sdio_irq)(struct mmc_host *host);
>  
>  	/* optional callback for HC quirks */

Reviewed-by: Matthias Kaehlcke <mka@...omium.org>