[PATCH v16 1/5] serdev: Make .remove in struct serdev_device_driver optional

From: Andrey Smirnov
Date: Wed Dec 20 2017 - 15:46:26 EST

Using devres infrastructure it is possible to write a serdev driver
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@xxxxxxxxxxxxxxx
Cc: linux-serial@xxxxxxxxxxxxxxx
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: cphealy@xxxxxxxxx
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Cc: Nikita Yushchenko <nikita.yoush@xxxxxxxxxxxxxxxxxx>
Cc: Lee Jones <lee.jones@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Pavel Machek <pavel@xxxxxx>
Cc: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Cc: Johan Hovold <johan@xxxxxxxxxx>
Cc: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxxxx>
Cc: Philippe Ombredanne <pombredanne@xxxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
Reviewed-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
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 1bef39828ca7..34050b439c1f 100644
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -268,8 +268,8 @@ 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;