linux-kernel - [PATCH 5/6] nvmem: release the write-protect pin

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Message-Id: <20200217195435.9309-6-brgl@bgdev.pl>
Date:   Mon, 17 Feb 2020 20:54:34 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Khouloud Touil <ktouil@...libre.com>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        geert@...ux-m68k.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 5/6] nvmem: release the write-protect pin

From: Khouloud Touil <ktouil@...libre.com>

Put the write-protect GPIO descriptor in nvmem_release() and in the
error path in nvmem_register().

Fixes: 2a127da461a9 ("nvmem: add support for the write-protect pin")
Reported-by: geert@...ux-m68k.org
Signed-off-by: Khouloud Touil <ktouil@...libre.com>
[Bartosz:
    - also put the gpio in error path in nvmem_register(),
    - tweak the commit message: the GPIO is not auto-released]
Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 drivers/nvmem/core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 07af9edea9cf..096c7bae9e74 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -72,6 +72,7 @@ static void nvmem_release(struct device *dev)
 	struct nvmem_device *nvmem = to_nvmem_device(dev);
 
 	ida_simple_remove(&nvmem_ida, nvmem->id);
+	gpiod_put(nvmem->wp_gpio);
 	kfree(nvmem);
 }
 
@@ -430,6 +431,7 @@ struct nvmem_device *nvmem_register(const struct nvmem_config *config)
 	device_del(&nvmem->dev);
 err_put_device:
 	put_device(&nvmem->dev);
+	gpiod_put(nvmem->wp_gpio);
 err_ida_remove:
 	ida_simple_remove(&nvmem_ida, nvmem->id);
 
-- 
2.25.0