Re: [PATCH v10 2/5] serdev: Introduce devm_serdev_device_open()

[Andrey Smirnov <andrew.smirnov@gmail.com>]

On Sun, Nov 5, 2017 at 7:38 AM, Johan Hovold <johan@kernel.org> wrote:
> On Tue, Oct 31, 2017 at 09:36:53AM -0700, Andrey Smirnov wrote:
>> Add code implementing managed version of serdev_device_open() for
>> serdev device drivers that "open" the device during driver's lifecycle
>> only once (e.g. opened in .probe() and closed in .remove()).
>>
>> Cc: linux-kernel@vger.kernel.org
>> Cc: linux-serial@vger.kernel.org
>> Cc: Rob Herring <robh@kernel.org>
>> Cc: cphealy@gmail.com
>> Cc: Guenter Roeck <linux@roeck-us.net>
>> Cc: Lucas Stach <l.stach@pengutronix.de>
>> Cc: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
>> Cc: Lee Jones <lee.jones@linaro.org>
>> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
>> Cc: Pavel Machek <pavel@ucw.cz>
>> Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
>> Cc: Johan Hovold <johan@kernel.org>
>> Cc: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
>> Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
>> Reviewed-by: Guenter Roeck <linux@roeck-us.net>
>> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
>> ---
>>  Documentation/driver-model/devres.txt |  3 +++
>>  drivers/tty/serdev/core.c             | 27 +++++++++++++++++++++++++++
>>  include/linux/serdev.h                |  1 +
>>  3 files changed, 31 insertions(+)
>
>> +int devm_serdev_device_open(struct device *dev, struct serdev_device *serdev)
>> +{
>> +     struct serdev_device **dr;
>> +     int ret;
>> +
>> +     dr = devres_alloc(devm_serdev_device_release, sizeof(*dr), GFP_KERNEL);
>> +     if (!dr)
>> +             return -ENOMEM;
>> +
>> +     ret = serdev_device_open(serdev);
>> +     if (ret) {
>> +             devres_free(dr);
>> +             return ret;
>> +     }
>> +
>> +     *dr = serdev;
>> +     devres_add(dev, dr);
>> +
>> +     return ret;
>
> This would be more readable as return 0.

Sure, I'll change that in v11.

Thanks,
Andrey Smrinov