diff mbox series

[05/21] gpiolib: add support for scope-based management to gpio_device

Message ID 20230905185309.131295-6-brgl@bgdev.pl
State Superseded
Headers show
Series gpio: convert users to gpio_device_find() and remove gpiochip_find() | expand

Commit Message

Bartosz Golaszewski Sept. 5, 2023, 6:52 p.m. UTC 
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

As the few users that need to get the reference to the GPIO device often
release it right after inspecting its properties, let's add support for
the automatic reference release to struct gpio_device.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 include/linux/gpio/driver.h | 2 ++
 1 file changed, 2 insertions(+)

Comments

Linus Walleij Sept. 7, 2023, 7:09 a.m. UTC | #1 
On Tue, Sep 5, 2023 at 8:53 PM Bartosz Golaszewski <brgl@bgdev.pl> wrote:

> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> As the few users that need to get the reference to the GPIO device often
> release it right after inspecting its properties, let's add support for
> the automatic reference release to struct gpio_device.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Needless to say, I'm a strong advocate for scoped resource management.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij
diff mbox series

Patch

diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index a769baf3d731..b2572b26c8e3 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -614,6 +614,8 @@  struct gpio_device *gpio_device_find_by_label(const char *label);
 struct gpio_device *gpio_device_get(struct gpio_device *gdev);
 void gpio_device_put(struct gpio_device *gdev);
 
+DEFINE_FREE(gpio_device_put, struct gpio_device *, if (_T) gpio_device_put(_T));
+
 bool gpiochip_line_is_irq(struct gpio_chip *gc, unsigned int offset);
 int gpiochip_reqres_irq(struct gpio_chip *gc, unsigned int offset);
 void gpiochip_relres_irq(struct gpio_chip *gc, unsigned int offset);