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Subject[PATCH v2 2/3] iio: kfifo: Add resource management devm_iio_kfifo_allocate/free
Date
iio kfifo allocate/free gained their devm_ wrappers.

Signed-off-by: Karol Wrona <k.wrona@samsung.com>
Suggested-by: Jonathan Cameron <jic23@kernel.org>
---
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
--
1.7.9.5


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