From cddf70d0bce71c2ad69b7bef7a9f20d8104cbfd8 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 17:00:44 +0100 Subject: [PATCH] i2c: dev: fix notifier return values We have a set of return values that notifier callbacks can return. They should not return 0, error codes or anything other than those predefined values. Make the i2c character device's callback return NOTIFY_DONE or NOTIFY_OK depending on the situation. Signed-off-by: Bartosz Golaszewski Signed-off-by: Wolfram Sang --- drivers/i2c/i2c-dev.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c index ab0adaa..107623c 100644 --- a/drivers/i2c/i2c-dev.c +++ b/drivers/i2c/i2c-dev.c @@ -653,12 +653,12 @@ static int i2cdev_attach_adapter(struct device *dev, void *dummy) int res; if (dev->type != &i2c_adapter_type) - return 0; + return NOTIFY_DONE; adap = to_i2c_adapter(dev); i2c_dev = get_free_i2c_dev(adap); if (IS_ERR(i2c_dev)) - return PTR_ERR(i2c_dev); + return NOTIFY_DONE; cdev_init(&i2c_dev->cdev, &i2cdev_fops); i2c_dev->cdev.owner = THIS_MODULE; @@ -678,11 +678,11 @@ static int i2cdev_attach_adapter(struct device *dev, void *dummy) goto err_put_i2c_dev; pr_debug("adapter [%s] registered as minor %d\n", adap->name, adap->nr); - return 0; + return NOTIFY_OK; err_put_i2c_dev: put_i2c_dev(i2c_dev, false); - return res; + return NOTIFY_DONE; } static int i2cdev_detach_adapter(struct device *dev, void *dummy) @@ -691,17 +691,17 @@ static int i2cdev_detach_adapter(struct device *dev, void *dummy) struct i2c_dev *i2c_dev; if (dev->type != &i2c_adapter_type) - return 0; + return NOTIFY_DONE; adap = to_i2c_adapter(dev); i2c_dev = i2c_dev_get_by_minor(adap->nr); if (!i2c_dev) /* attach_adapter must have failed */ - return 0; + return NOTIFY_DONE; put_i2c_dev(i2c_dev, true); pr_debug("adapter [%s] unregistered\n", adap->name); - return 0; + return NOTIFY_OK; } static int i2cdev_notifier_call(struct notifier_block *nb, unsigned long action, @@ -716,7 +716,7 @@ static int i2cdev_notifier_call(struct notifier_block *nb, unsigned long action, return i2cdev_detach_adapter(dev, NULL); } - return 0; + return NOTIFY_DONE; } static struct notifier_block i2cdev_notifier = { -- 2.7.4