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[PATCH 2/2] media: stm32-dcmi: add mandatory of_node_put() in success path




The endpoint allocated by of_graph_get_next_endpoint() needs an of_node_put()
in both error and success path. As  ep  is not used the refcount decrement
can be right after the last use of  ep.

Signed-off-by: Nicholas Mc Guire <hofrat@xxxxxxxxx>
Fixes: commit 37404f91ef8b ("[media] stm32-dcmi: STM32 DCMI camera interface driver")
---

Problem located with an experimental coccinelle script

Patch was compile tested with: x86_64_defconfig, MEDIA_SUPPORT=y
MEDIA_CAMERA_SUPPORT=y, V4L_PLATFORM_DRIVERS=y, OF=y, COMPILE_TEST=y
CONFIG_VIDEO_STM32_DCMI=y
(There are a number of sparse warnings - not related to the changes though)

Patch is on top of "[PATCH 1/2] media: stm32-dcmi: drop unneceeary while(1)
loop" against 4.17.0 (localversion-next is next-20180608)

 drivers/media/platform/stm32/stm32-dcmi.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
index 70b81d2..542d148 100644
--- a/drivers/media/platform/stm32/stm32-dcmi.c
+++ b/drivers/media/platform/stm32/stm32-dcmi.c
@@ -1610,10 +1610,9 @@ static int dcmi_graph_parse(struct stm32_dcmi *dcmi, struct device_node *node)
 		return -EINVAL;
 
 	remote = of_graph_get_remote_port_parent(ep);
-	if (!remote) {
-		of_node_put(ep);
+	of_node_put(ep);
+	if (!remote)
 		return -EINVAL;
-	}
 
 	/* Remote node to connect */
 	dcmi->entity.node = remote;
-- 
2.1.4