[PATCH 7/7] iio: inkern: simplify some devm functions

Yicong Yang
2021-04-08T11:41:04Z

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>
---
drivers/iio/inkern.c | 61 ++++++++++++++++++++--------------------------------
1 file changed, 23 insertions(+), 38 deletions(-)

diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index db77a2d..5de35cc 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -359,30 +359,24 @@ void iio_channel_release(struct iio_channel *channel)
}
EXPORT_SYMBOL_GPL(iio_channel_release);

-static void devm_iio_channel_free(struct device *dev, void *res)
+static void devm_iio_channel_free(void *iio_channel)
{
- struct iio_channel *channel = *(struct iio_channel **)res;
-
- iio_channel_release(channel);
+ iio_channel_release(iio_channel);
}

struct iio_channel *devm_iio_channel_get(struct device *dev,
const char *channel_name)
{
- struct iio_channel **ptr, *channel;
-
- ptr = devres_alloc(devm_iio_channel_free, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
+ struct iio_channel *channel;
+ int ret;

channel = iio_channel_get(dev, channel_name);
- if (IS_ERR(channel)) {
- devres_free(ptr);
+ if (IS_ERR(channel))
return channel;
- }

- *ptr = channel;
- devres_add(dev, ptr);
+ ret = devm_add_action_or_reset(dev, devm_iio_channel_free, channel);
+ if (ret)
+ return ERR_PTR(ret);

return channel;
}
@@ -392,20 +386,16 @@ struct iio_channel *devm_of_iio_channel_get_by_name(struct device *dev,
struct device_node *np,
const char *channel_name)
{
- struct iio_channel **ptr, *channel;
-
- ptr = devres_alloc(devm_iio_channel_free, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
+ struct iio_channel *channel;
+ int ret;

channel = of_iio_channel_get_by_name(np, channel_name);
- if (IS_ERR(channel)) {
- devres_free(ptr);
+ if (IS_ERR(channel))
return channel;
- }

- *ptr = channel;
- devres_add(dev, ptr);
+ ret = devm_add_action_or_reset(dev, devm_iio_channel_free, channel);
+ if (ret)
+ return ERR_PTR(ret);

return channel;
}
@@ -496,29 +486,24 @@ void iio_channel_release_all(struct iio_channel *channels)
}
EXPORT_SYMBOL_GPL(iio_channel_release_all);

-static void devm_iio_channel_free_all(struct device *dev, void *res)
+static void devm_iio_channel_free_all(void *iio_channels)
{
- struct iio_channel *channels = *(struct iio_channel **)res;
-
- iio_channel_release_all(channels);
+ iio_channel_release_all(iio_channels);
}

struct iio_channel *devm_iio_channel_get_all(struct device *dev)
{
- struct iio_channel **ptr, *channels;
-
- ptr = devres_alloc(devm_iio_channel_free_all, sizeof(*ptr), GFP_KERNEL);
- if (!ptr)
- return ERR_PTR(-ENOMEM);
+ struct iio_channel *channels;
+ int ret;

channels = iio_channel_get_all(dev);
- if (IS_ERR(channels)) {
- devres_free(ptr);
+ if (IS_ERR(channels))
return channels;
- }

- *ptr = channels;
- devres_add(dev, ptr);
+ ret = devm_add_action_or_reset(dev, devm_iio_channel_free_all,
+ channels);
+ if (ret)
+ return ERR_PTR(ret);

return channels;
}
--
2.8.1