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SubjectRe: [PATCH v2 2/3] iio: kfifo: Add resource management devm_iio_kfifo_allocate/free
On 19/12/14 17:39, Karol Wrona wrote:
> iio kfifo allocate/free gained their devm_ wrappers.
>
> Signed-off-by: Karol Wrona <k.wrona@samsung.com>
> Suggested-by: Jonathan Cameron <jic23@kernel.org>
Applied to the togreg branch of iio.git.

One addition - added to the list of devm functions in
Documentation/device-model/devres.txt


> ---
> drivers/iio/kfifo_buf.c | 54 +++++++++++++++++++++++++++++++++++++++++
> include/linux/iio/kfifo_buf.h | 3 +++
> 2 files changed, 57 insertions(+)
>
> diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c
> index a383291..5d44099 100644
> --- a/drivers/iio/kfifo_buf.c
> +++ b/drivers/iio/kfifo_buf.c
> @@ -191,4 +191,58 @@ 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");
> diff --git a/include/linux/iio/kfifo_buf.h b/include/linux/iio/kfifo_buf.h
> index 1a8d57a..1683bc7 100644
> --- a/include/linux/iio/kfifo_buf.h
> +++ b/include/linux/iio/kfifo_buf.h
> @@ -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
>



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