linux-kernel - Re: [PATCH v8 1/5] serdev: Make .remove in struct serdev_device

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Date:   Sat, 21 Oct 2017 10:08:40 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Andrey Smirnov <andrew.smirnov@...il.com>,
        linux-kernel@...r.kernel.org
Cc:     linux-serial@...r.kernel.org, Rob Herring <robh@...nel.org>,
        cphealy@...il.com, Lucas Stach <l.stach@...gutronix.de>,
        Nikita Yushchenko <nikita.yoush@...entembedded.com>,
        Lee Jones <lee.jones@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Pavel Machek <pavel@....cz>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Johan Hovold <johan@...nel.org>
Subject: Re: [PATCH v8 1/5] serdev: Make .remove in struct
 serdev_device_driver optional

On 10/18/2017 10:01 AM, Andrey Smirnov wrote:
> Using devres infrastructure it is possible to wirte a serdev driver

s/wirte/write/

otherwise

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

> that doesn't have any code that needs to be called as a part of
> .remove. Add code to make .remove optional.
> 
> Cc: linux-kernel@...r.kernel.org
> Cc: linux-serial@...r.kernel.org
> Cc: Rob Herring <robh@...nel.org>
> Cc: cphealy@...il.com
> Cc: Guenter Roeck <linux@...ck-us.net>
> Cc: Lucas Stach <l.stach@...gutronix.de>
> Cc: Nikita Yushchenko <nikita.yoush@...entembedded.com>
> Cc: Lee Jones <lee.jones@...aro.org>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Pavel Machek <pavel@....cz>
> Cc: Andy Shevchenko <andy.shevchenko@...il.com>
> Cc: Johan Hovold <johan@...nel.org>
> Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
> ---
>   drivers/tty/serdev/core.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
> index c68fb3a8ea1c..f500f6a2ca88 100644
> --- a/drivers/tty/serdev/core.c
> +++ b/drivers/tty/serdev/core.c
> @@ -252,8 +252,8 @@ static int serdev_drv_probe(struct device *dev)
>   static int serdev_drv_remove(struct device *dev)
>   {
>   	const struct serdev_device_driver *sdrv = to_serdev_device_driver(dev->driver);
> -
> -	sdrv->remove(to_serdev_device(dev));
> +	if (sdrv->remove)
> +		sdrv->remove(to_serdev_device(dev));
>   	return 0;
>   }
>   
>