lkml.org 
[lkml]   [2022]   [Dec]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v2 1/2] i2c: dev: fix notifier return values
    Date
    From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

    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 <bartosz.golaszewski@linaro.org>
    ---
    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 ab0adaa130da..107623c4cc14 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 = {
    --
    2.37.2
    \
     
     \ /
      Last update: 2023-03-26 23:23    [W:4.412 / U:0.164 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site