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of/platform: clarify of_find_device_by_node refcounting

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Add comment clarifying that of_find_device_by_node() takes a reference
to the embedded struct device which needs to be dropped after use.

Note that most current users fail to do so.

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Johan Hovold 2016-11-01 11:53:22 +01:00 • committed by Rob Herring
parent 71ec6f4f73
commit 4fb373dfab
1 changed files with 3 additions and 0 deletions
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3
drivers/of/platform.c
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@ -45,6 +45,9 @@ static int of_dev_node_match(struct device *dev, void *data)
* of_find_device_by_node - Find the platform_device associated with a node
* @np: Pointer to device tree node
*
* Takes a reference to the embedded struct device which needs to be dropped
* after use.
*
* Returns platform_device pointer, or NULL if not found
*/
struct platform_device *of_find_device_by_node(struct device_node *np)