[PATCH] drm/imx: Fix of_node ref counting

From: Christophe JAILLET
Date: Sun Sep 04 2016 - 02:46:03 EST


This code is spurious.
It takes a ref on a node, then call 'of_node_put' on it and then store
this node somewhere.

It is likely that taking the ref on the parent node and releasing the child
node was expected instead.

So, use 'of_get_next_parent' instead. It does all this in just one
function call.

Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
---
Un-tested
---
drivers/gpu/drm/imx/imx-drm-core.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/imx/imx-drm-core.c b/drivers/gpu/drm/imx/imx-drm-core.c
index 438bac8fbc2b..60fb388c80f8 100644
--- a/drivers/gpu/drm/imx/imx-drm-core.c
+++ b/drivers/gpu/drm/imx/imx-drm-core.c
@@ -449,10 +449,8 @@ static int compare_of(struct device *dev, void *data)
}

/* Special case for LDB, one device for two channels */
- if (of_node_cmp(np->name, "lvds-channel") == 0) {
- np = of_get_parent(np);
- of_node_put(np);
- }
+ if (of_node_cmp(np->name, "lvds-channel") == 0)
+ np = of_get_next_parent(np);

return dev->of_node == np;
}
--
2.7.4