diff mbox series

[v5,4/5] nvmem: increase the reference count of a gpio passed over config

Message ID 20200221154837.18845-5-brgl@bgdev.pl
State Superseded
Headers show
Series nvmem/gpio: fix resource management | expand

Commit Message

Bartosz Golaszewski Feb. 21, 2020, 3:48 p.m. UTC 
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

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@baylibre.com>
---
 drivers/nvmem/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 2758d90d63b7..4a4ef2049022 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -349,7 +349,7 @@  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);