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powerpc/vio: Clarify vio_find_node() reference counting

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

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Johan Hovold 2016-11-01 16:26:02 +01:00 committed by Michael Ellerman
parent 815a7141c4
commit e8cfb7e7c3
1 changed files with 3 additions and 0 deletions
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arch/powerpc/kernel/vio.c
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@ -1648,6 +1648,9 @@ static struct vio_dev *vio_find_name(const char *name)
/**
* vio_find_node - find an already-registered vio_dev
* @vnode: device_node of the virtual device we're looking for
*
* Takes a reference to the embedded struct device which needs to be dropped
* after use.
*/
struct vio_dev *vio_find_node(struct device_node *vnode)
{