[PATCH 3/3] nvmem: increase the reference count of a gpio passed over config

[Bartosz Golaszewski <brgl@xxxxxxxx>]

From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>

We can obtain the write-protect GPIO in nvmem_register() by requesting
it ourselves or by storing the gpio_desc passed in nvmem_config. In the
latter case we need to increase the reference count so that it gets
freed correctly.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
---
 drivers/nvmem/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index c05c4f4a7b9e..790ec9b5552e 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -350,7 +350,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 	}
 
 	if (config->wp_gpio)
-		nvmem->wp_gpio = config->wp_gpio;
+		nvmem->wp_gpio = gpiod_ref(config->wp_gpio);
 	else
 		nvmem->wp_gpio = gpiod_get_optional(config->dev, "wp",
 						    GPIOD_OUT_HIGH);
-- 
2.25.0