From 780103fef5c88a97fb9c8d0079bf326ed6147f1f Mon Sep 17 00:00:00 2001 From: Karol Wrona Date: Fri, 19 Dec 2014 18:39:25 +0100 Subject: iio: kfifo: Add resource management devm_iio_kfifo_allocate/free iio kfifo allocate/free gained their devm_ wrappers. Signed-off-by: Karol Wrona Suggested-by: Jonathan Cameron Signed-off-by: Jonathan Cameron --- drivers/iio/kfifo_buf.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) (limited to 'drivers/iio/kfifo_buf.c') diff --git a/drivers/iio/kfifo_buf.c b/drivers/iio/kfifo_buf.c index 7f6fad658e83..b2beea01c49b 100644 --- a/drivers/iio/kfifo_buf.c +++ b/drivers/iio/kfifo_buf.c @@ -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"); -- cgit v1.2.3