[PATCH v4 1/4] nvmem: fix memory leak in error path

[Bartosz Golaszewski <brgl@bgdev.pl>]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

We need to free the ida mapping and nvmem struct if the write-protect
GPIO lookup fails.

Fixes: 2a127da461a9 ("nvmem: add support for the write-protect pin")
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/nvmem/core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 503da67dde06..948c7ebce340 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -353,8 +353,11 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 	else
 		nvmem->wp_gpio = gpiod_get_optional(config->dev, "wp",
 						    GPIOD_OUT_HIGH);
-	if (IS_ERR(nvmem->wp_gpio))
+	if (IS_ERR(nvmem->wp_gpio)) {
+		ida_simple_remove(&nvmem_ida, nvmem->id);
+		kfree(nvmem);
 		return ERR_CAST(nvmem->wp_gpio);
+	}
 
 	kref_init(&nvmem->refcnt);
 	INIT_LIST_HEAD(&nvmem->cells);
-- 
2.25.0