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USB: core: of: document reference taken by companion helper

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Document that the new companion-device lookup helper takes a reference
to the companion device which needs to be dropped after use.

Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2017-05-16 16:26:14 +02:00 committed by Greg Kroah-Hartman
parent a7415477a2
commit ef53b92ece
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/core/of.c
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@ -53,6 +53,9 @@ EXPORT_SYMBOL_GPL(usb_of_get_child_node);
*
* Find the companion device from platform bus.
*
* Takes a reference to the returned struct device which needs to be dropped
* after use.
*
* Return: On success, a pointer to the companion device, %NULL on failure.
*/
struct device *usb_of_get_companion_dev(struct device *dev)