linux-kernel - [PATCH 1/7] Input: synaptics-rmi4: Increment the refcount of the transport dev's of

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Message-ID: <1464979153-2386-1-git-send-email-aduggan@synaptics.com>
Date:	Fri, 3 Jun 2016 11:39:13 -0700
From:	Andrew Duggan <aduggan@...aptics.com>
To:	<linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:	Andrew Duggan <aduggan@...aptics.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Jiri Kosina <jikos@...nel.org>,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Vincent Huang <vincent.huang@...synaptics.com>,
	Nick Dyer <nick.dyer@...ev.co.uk>
Subject: [PATCH 1/7] Input: synaptics-rmi4: Increment the refcount of the transport dev's of_node

Increment the refcount for the transport device's of_node before calling
of_find_node_by_name(). Since of_find_node_by_name() assumes the refcount
was incremented by the caller and calls of_node_put() when it is done.

Signed-off-by: Andrew Duggan <aduggan@...aptics.com>
---
 drivers/input/rmi4/rmi_bus.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/input/rmi4/rmi_bus.c b/drivers/input/rmi4/rmi_bus.c
index b368b05..55b5336 100644
--- a/drivers/input/rmi4/rmi_bus.c
+++ b/drivers/input/rmi4/rmi_bus.c
@@ -157,11 +157,12 @@ static int rmi_function_match(struct device *dev, struct device_driver *drv)
 static void rmi_function_of_probe(struct rmi_function *fn)
 {
 	char of_name[9];
+	struct device_node *node = fn->rmi_dev->xport->dev->of_node;
 
 	snprintf(of_name, sizeof(of_name), "rmi4-f%02x",
 		fn->fd.function_number);
-	fn->dev.of_node = of_find_node_by_name(
-				fn->rmi_dev->xport->dev->of_node, of_name);
+	of_node_get(node);
+	fn->dev.of_node = of_find_node_by_name(node, of_name);
 }
 #else
 static inline void rmi_function_of_probe(struct rmi_function *fn)
-- 
2.5.0