linux-kernel - Re: [PATCH 2/2] mmc: sdhci-of-at91: Fix module autoload

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Date:   Fri, 21 Oct 2016 08:48:19 +0200
From:   Ludovic Desroches <ludovic.desroches@...el.com>
To:     Javier Martinez Canillas <javier@....samsung.com>
CC:     <linux-kernel@...r.kernel.org>,
        Ludovic Desroches <ludovic.desroches@...el.com>,
        <linux-mmc@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [PATCH 2/2] mmc: sdhci-of-at91: Fix module autoload

On Mon, Oct 17, 2016 at 01:13:45PM -0300, Javier Martinez Canillas wrote:
> If the driver is built as a module, autoload won't work because the module
> alias information is not filled. So user-space can't match the registered
> device with the corresponding module.
> 
> Export the module alias information using the MODULE_DEVICE_TABLE() macro.
> 
> Before this patch:
> 
> $ modinfo drivers/mmc/host/sdhci-of-at91.ko | grep alias
> $
> 
> After this patch:
> 
> $ modinfo drivers/mmc/host/sdhci-of-at91.ko | grep alias
> alias:          of:N*T*Catmel,sama5d2-sdhciC*
> alias:          of:N*T*Catmel,sama5d2-sdhci
> 
> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
Acked-by: Ludovic Desroches <ludovic.desroches@...el.com>

Thanks
> ---
> 
>  drivers/mmc/host/sdhci-of-at91.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mmc/host/sdhci-of-at91.c b/drivers/mmc/host/sdhci-of-at91.c
> index a9b7fc06c434..2f9ad213377a 100644
> --- a/drivers/mmc/host/sdhci-of-at91.c
> +++ b/drivers/mmc/host/sdhci-of-at91.c
> @@ -100,6 +100,7 @@ static const struct of_device_id sdhci_at91_dt_match[] = {
>  	{ .compatible = "atmel,sama5d2-sdhci", .data = &soc_data_sama5d2 },
>  	{}
>  };
> +MODULE_DEVICE_TABLE(of, sdhci_at91_dt_match);
>  
>  #ifdef CONFIG_PM
>  static int sdhci_at91_runtime_suspend(struct device *dev)
> -- 
> 2.7.4
>