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[v2,1/4] input: twl6040-vibra: fix DT node memory management

Message ID c2392b32fb29d82ca99833cd90132c9a7865d6ec.1461239029.git.hns@goldelico.com (mailing list archive)
State Accepted
Headers show

Commit Message

H. Nikolaus Schaller April 21, 2016, 11:43 a.m. UTC
commit e7ec014a47e4 ("Input: twl6040-vibra - update for device tree support")

made the separate vibra DT node to a subnode of the twl6040.

It now calls of_find_node_by_name() to locate the "vibra" subnode.
This function has a side effect to call of_node_put on() for the twl6040
parent node passed in as a parameter. This causes trouble later on.

Solution: we must call of_node_get() before of_find_node_by_name()

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
---
 drivers/input/misc/twl6040-vibra.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/drivers/input/misc/twl6040-vibra.c b/drivers/input/misc/twl6040-vibra.c
index 0c853c2..ad15498 100644
--- a/drivers/input/misc/twl6040-vibra.c
+++ b/drivers/input/misc/twl6040-vibra.c
@@ -257,6 +257,7 @@  static int twl6040_vibra_probe(struct platform_device *pdev)
 	int vddvibr_uV = 0;
 	int error;
 
+	of_node_get(twl6040_core_dev->of_node);
 	twl6040_core_node = of_find_node_by_name(twl6040_core_dev->of_node,
 						 "vibra");
 	if (!twl6040_core_node) {