linux-kernel - Re: [PATCH 2/2] watchdog: max77620

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Message-ID: <20161014165610.GB21425@roeck-us.net>
Date:   Fri, 14 Oct 2016 09:56:10 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Javier Martinez Canillas <javier@....samsung.com>
Cc:     linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org,
        Wim Van Sebroeck <wim@...ana.be>
Subject: Re: [PATCH 2/2] watchdog: max77620_wdt: fix module autoload

On Fri, Oct 14, 2016 at 12:23:51PM -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/watchdog/max77620_wdt.ko | grep alias
> $
> 
> After this patch:
> 
> modinfo drivers/watchdog/max77620_wdt.ko | grep alias
> alias:          platform:max77620-watchdog
> 
> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
> 
>  drivers/watchdog/max77620_wdt.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/watchdog/max77620_wdt.c b/drivers/watchdog/max77620_wdt.c
> index 48b84df2afda..68c41fa2be27 100644
> --- a/drivers/watchdog/max77620_wdt.c
> +++ b/drivers/watchdog/max77620_wdt.c
> @@ -205,6 +205,7 @@ static struct platform_device_id max77620_wdt_devtype[] = {
>  	{ .name = "max77620-watchdog", },
>  	{ },
>  };
> +MODULE_DEVICE_TABLE(platform, max77620_wdt_devtype);
>  
>  static struct platform_driver max77620_wdt_driver = {
>  	.driver	= {
> -- 
> 2.7.4
>