linux-kernel - Re: [PATCH v3 10/10] mfd: mfd-core: Move pdev->mfd_cell creation back into mfd_add

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Date:   Fri, 25 Oct 2019 09:56:22 +0100
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     arnd@...db.de, broonie@...nel.org, linus.walleij@...aro.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        baohua@...nel.org, stephan@...hold.net
Subject: Re: [PATCH v3 10/10] mfd: mfd-core: Move pdev->mfd_cell creation
 back into mfd_add_device()

On Thu, Oct 24, 2019 at 05:38:32PM +0100, Lee Jones wrote:
> Most of the complexity of mfd_platform_add_cell() has been removed. The
> only functionality left duplicates cell memory into the child's platform
> device. Since it's only a few lines, moving it to the main thread and
> removing the superfluous function makes sense.
> 
> Signed-off-by: Lee Jones <lee.jones@...aro.org>

Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>


> ---
>  drivers/mfd/mfd-core.c | 21 ++++-----------------
>  1 file changed, 4 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
> index 2535dd3605c0..cb3e0a14bbdd 100644
> --- a/drivers/mfd/mfd-core.c
> +++ b/drivers/mfd/mfd-core.c
> @@ -49,19 +49,6 @@ int mfd_cell_disable(struct platform_device *pdev)
>  }
>  EXPORT_SYMBOL(mfd_cell_disable);
>  
> -static int mfd_platform_add_cell(struct platform_device *pdev,
> -				 const struct mfd_cell *cell)
> -{
> -	if (!cell)
> -		return 0;
> -
> -	pdev->mfd_cell = kmemdup(cell, sizeof(*cell), GFP_KERNEL);
> -	if (!pdev->mfd_cell)
> -		return -ENOMEM;
> -
> -	return 0;
> -}
> -
>  #if IS_ENABLED(CONFIG_ACPI)
>  static void mfd_acpi_add_device(const struct mfd_cell *cell,
>  				struct platform_device *pdev)
> @@ -141,6 +128,10 @@ static int mfd_add_device(struct device *parent, int id,
>  	if (!pdev)
>  		goto fail_alloc;
>  
> +	pdev->mfd_cell = kmemdup(cell, sizeof(*cell), GFP_KERNEL);
> +	if (!pdev->mfd_cell)
> +		goto fail_device;
> +
>  	res = kcalloc(cell->num_resources, sizeof(*res), GFP_KERNEL);
>  	if (!res)
>  		goto fail_device;
> @@ -183,10 +174,6 @@ static int mfd_add_device(struct device *parent, int id,
>  			goto fail_alias;
>  	}
>  
> -	ret = mfd_platform_add_cell(pdev, cell);
> -	if (ret)
> -		goto fail_alias;
> -
>  	for (r = 0; r < cell->num_resources; r++) {
>  		res[r].name = cell->resources[r].name;
>  		res[r].flags = cell->resources[r].flags;
> -- 
> 2.17.1
>