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iio: kfifo: Add resource management devm_iio_kfifo_allocate/free

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iio kfifo allocate/free gained their devm_ wrappers.

Signed-off-by: Karol Wrona <k.wrona@samsung.com>
Suggested-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Karol Wrona 2014-12-19 18:39:25 +01:00 committed by Jonathan Cameron
parent 7ab374a053
commit 780103fef5
3 changed files with 59 additions and 0 deletions
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2
Documentation/driver-model/devres.txt
View file

@ -258,6 +258,8 @@ IIO
devm_iio_device_free()
devm_iio_device_register()
devm_iio_device_unregister()
devm_iio_kfifo_allocate()
devm_iio_kfifo_free()
devm_iio_trigger_alloc()
devm_iio_trigger_free()

54
drivers/iio/kfifo_buf.c
View file

@ -164,4 +164,58 @@ void iio_kfifo_free(struct iio_buffer *r)
}
EXPORT_SYMBOL(iio_kfifo_free);
static void devm_iio_kfifo_release(struct device *dev, void *res)
{
iio_kfifo_free(*(struct iio_buffer **)res);
}
static int devm_iio_kfifo_match(struct device *dev, void *res, void *data)
{
struct iio_buffer **r = res;
if (WARN_ON(!r || !*r))
return 0;
return *r == data;
}
/**
* devm_iio_fifo_allocate - Resource-managed iio_kfifo_allocate()
* @dev: Device to allocate kfifo buffer for
*
* RETURNS:
* Pointer to allocated iio_buffer on success, NULL on failure.
*/
struct iio_buffer *devm_iio_kfifo_allocate(struct device *dev)
{
struct iio_buffer **ptr, *r;
ptr = devres_alloc(devm_iio_kfifo_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return NULL;
r = iio_kfifo_allocate();
if (r) {
*ptr = r;
devres_add(dev, ptr);
} else {
devres_free(ptr);
}
return r;
}
EXPORT_SYMBOL(devm_iio_kfifo_allocate);
/**
* devm_iio_fifo_free - Resource-managed iio_kfifo_free()
* @dev: Device the buffer belongs to
* @r: The buffer associated with the device
*/
void devm_iio_kfifo_free(struct device *dev, struct iio_buffer *r)
{
WARN_ON(devres_release(dev, devm_iio_kfifo_release,
devm_iio_kfifo_match, r));
}
EXPORT_SYMBOL(devm_iio_kfifo_free);
MODULE_LICENSE("GPL");

3
include/linux/iio/kfifo_buf.h
View file

@ -8,4 +8,7 @@
struct iio_buffer *iio_kfifo_allocate(void);
void iio_kfifo_free(struct iio_buffer *r);
struct iio_buffer *devm_iio_kfifo_allocate(struct device *dev);
void devm_iio_kfifo_free(struct device *dev, struct iio_buffer *r);
#endif