iio: core: simplify some devm functions

Use devm_add_action_or_reset() instead of devres_alloc() and
devres_add(), which works the same. This will simplify the
code. There is no functional changes.

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/1617881896-3164-6-git-send-email-yangyicong@hisilicon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 59efb36..3fdcf2d 100644 (file)
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1657,9 +1657,9 @@ void iio_device_free(struct iio_dev *dev)
 }
 EXPORT_SYMBOL(iio_device_free);
 
-static void devm_iio_device_release(struct device *dev, void *res)
+static void devm_iio_device_release(void *iio_dev)
 {
-       iio_device_free(*(struct iio_dev **)res);
+       iio_device_free(iio_dev);
 }
 
 /**
@@ -1675,20 +1675,17 @@ static void devm_iio_device_release(struct device *dev, void *res)
  */
 struct iio_dev *devm_iio_device_alloc(struct device *parent, int sizeof_priv)
 {
-       struct iio_dev **ptr, *iio_dev;
+       struct iio_dev *iio_dev;
+       int ret;
 
-       ptr = devres_alloc(devm_iio_device_release, sizeof(*ptr),
-                          GFP_KERNEL);
-       if (!ptr)
+       iio_dev = iio_device_alloc(parent, sizeof_priv);
+       if (!iio_dev)
                return NULL;
 
-       iio_dev = iio_device_alloc(parent, sizeof_priv);
-       if (iio_dev) {
-               *ptr = iio_dev;
-               devres_add(parent, ptr);
-       } else {
-               devres_free(ptr);
-       }
+       ret = devm_add_action_or_reset(parent, devm_iio_device_release,
+                                      iio_dev);
+       if (ret)
+               return ERR_PTR(ret);
 
        return iio_dev;
 }
@@ -1944,29 +1941,21 @@ void iio_device_unregister(struct iio_dev *indio_dev)
 }
 EXPORT_SYMBOL(iio_device_unregister);
 
-static void devm_iio_device_unreg(struct device *dev, void *res)
+static void devm_iio_device_unreg(void *indio_dev)
 {
-       iio_device_unregister(*(struct iio_dev **)res);
+       iio_device_unregister(indio_dev);
 }
 
 int __devm_iio_device_register(struct device *dev, struct iio_dev *indio_dev,
                               struct module *this_mod)
 {
-       struct iio_dev **ptr;
        int ret;
 
-       ptr = devres_alloc(devm_iio_device_unreg, sizeof(*ptr), GFP_KERNEL);
-       if (!ptr)
-               return -ENOMEM;
-
-       *ptr = indio_dev;
        ret = __iio_device_register(indio_dev, this_mod);
-       if (!ret)
-               devres_add(dev, ptr);
-       else
-               devres_free(ptr);
+       if (ret)
+               return ret;
 
-       return ret;
+       return devm_add_action_or_reset(dev, devm_iio_device_unreg, indio_dev);
 }
 EXPORT_SYMBOL_GPL(__devm_iio_device_register);