driver core: platform: Document return type of more functions
I can't always remember the return values of these functions, and so I
usually jump to the function to read the kernel-doc and see that it
doesn't tell me. Then I have to spend more time reading the code to jump
to the function that actually tells me the return values. Let's document
it here so that we don't all have to spend time digging through the code
to understand the return values.
Cc: <linux-doc@vger.kernel.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20200910060440.2302925-1-swboyd@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/lib/devres.c b/lib/devres.c
index 8bd3ed4..2a4ff5d 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -162,13 +162,15 @@ __devm_ioremap_resource(struct device *dev, const struct resource *res,
* region and ioremaps it. All operations are managed and will be undone
* on driver detach.
*
- * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
- * on failure. Usage example:
+ * Usage example:
*
* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
* base = devm_ioremap_resource(&pdev->dev, res);
* if (IS_ERR(base))
* return PTR_ERR(base);
+ *
+ * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure.
*/
void __iomem *devm_ioremap_resource(struct device *dev,
const struct resource *res)
@@ -183,8 +185,8 @@ EXPORT_SYMBOL(devm_ioremap_resource);
* @dev: generic device to handle the resource for
* @res: resource to be handled
*
- * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
- * on failure. Usage example:
+ * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
+ * on failure.
*/
void __iomem *devm_ioremap_resource_wc(struct device *dev,
const struct resource *res)
@@ -207,8 +209,8 @@ void __iomem *devm_ioremap_resource_wc(struct device *dev,
* @node: The device-tree node where the resource resides
* @index: index of the MMIO range in the "reg" property
* @size: Returns the size of the resource (pass NULL if not needed)
- * Returns a pointer to the requested and mapped memory or an ERR_PTR() encoded
- * error code on failure. Usage example:
+ *
+ * Usage example:
*
* base = devm_of_iomap(&pdev->dev, node, 0, NULL);
* if (IS_ERR(base))
@@ -219,6 +221,8 @@ void __iomem *devm_ioremap_resource_wc(struct device *dev,
* two drivers try to map the same memory, the of_iomap() function will succeed
* but the devm_of_iomap() function will return -EBUSY.
*
+ * Return: a pointer to the requested and mapped memory or an ERR_PTR() encoded
+ * error code on failure.
*/
void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
resource_size_t *size)
@@ -256,6 +260,8 @@ static int devm_ioport_map_match(struct device *dev, void *res,
*
* Managed ioport_map(). Map is automatically unmapped on driver
* detach.
+ *
+ * Return: a pointer to the remapped memory or NULL on failure.
*/
void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
unsigned int nr)
