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Groups > linux.kernel > #1255203

[PATCH 3/9] leds: bcm6328: add missing of_node_put

From Julia Lawall <Julia.Lawall@lip6.fr>
Newsgroups linux.kernel
Subject [PATCH 3/9] leds: bcm6328: add missing of_node_put
Date 2015-10-24 17:00 +0200
Message-ID <qn8sy-3q2-21@gated-at.bofh.it> (permalink)
References <qn8sx-3q2-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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for_each_available_child_of_node performs an of_node_get on each iteration, so
a break out of the loop requires an of_node_put.

A simplified version of the semantic patch that fixes this problem is as
follows (http://coccinelle.lip6.fr):

// <smpl>
@@
expression root,e;
local idexpression child;
@@

 for_each_available_child_of_node(root, child) {
   ... when != of_node_put(child)
       when != e = child
(
   return child;
|
+  of_node_put(child);
?  return ...;
)
   ...
 }
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 drivers/leds/leds-bcm6328.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/leds/leds-bcm6328.c b/drivers/leds/leds-bcm6328.c
index 18de094..c7ea5c6 100644
--- a/drivers/leds/leds-bcm6328.c
+++ b/drivers/leds/leds-bcm6328.c
@@ -403,8 +403,10 @@ static int bcm6328_leds_probe(struct platform_device *pdev)
 			rc = bcm6328_led(dev, child, reg, mem, lock,
 					 blink_leds, blink_delay);
 
-		if (rc < 0)
+		if (rc < 0) {
+			of_node_put(child);
 			return rc;
+		}
 	}
 
 	return 0;

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Thread

[PATCH 0/9] add missing of_node_put Julia Lawall <Julia.Lawall@lip6.fr> - 2015-10-24 17:00 +0200
  [PATCH 4/9] leds: 88pm860x: add missing of_node_put Julia Lawall <Julia.Lawall@lip6.fr> - 2015-10-24 17:00 +0200
  [PATCH 2/9] leds: bcm6358: add missing of_node_put Julia Lawall <Julia.Lawall@lip6.fr> - 2015-10-24 17:00 +0200
  [PATCH 3/9] leds: bcm6328: add missing of_node_put Julia Lawall <Julia.Lawall@lip6.fr> - 2015-10-24 17:00 +0200
  [PATCH 7/9] gpu: host1x: add missing of_node_put Julia Lawall <Julia.Lawall@lip6.fr> - 2015-10-24 17:00 +0200
  [PATCH 8/9] soc: ti: knav_qmss_queue: add missing of_node_put Julia Lawall <Julia.Lawall@lip6.fr> - 2015-10-24 17:00 +0200
  Re: [PATCH 0/9] add missing of_node_put Jacek Anaszewski <j.anaszewski@samsung.com> - 2015-10-26 09:50 +0100

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