From: Johan Hovold <johan@kernel.org>
Date: Tue, 1 Nov 2016 15:26:02 +0000 (+0100)
Subject: powerpc/vio: Clarify vio_find_node() reference counting
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e8cfb7e7c3b2be8a4c2241b5da2ae62bc1f4808f;p=linux-beck.git

powerpc/vio: Clarify vio_find_node() reference counting

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>
---

diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index b3813ddb2fb4..2c8fb3ec989e 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -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)
 {