Oct 13 2015

soc: qcom: smd: delete unneeded of_node_put 

Author: Julia Lawall <Julia.Lawall@lip6.fr>

Device node iterators perform an of_node_put on each iteration, so putting
an of_node_put before a continue results in a double put.

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

// 
@@
expression root,e;
local idexpression child;
iterator i;
@@

 i(..., child, ...) {
   ... when != of_node_get(child)
*  of_node_put(child);
   ...
*  continue;
}
// 

Signed-off-by: Julia Lawall 
Signed-off-by: Andy Gross 

---
 drivers/soc/qcom/smd.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
 
diff --git a/drivers/soc/qcom/smd.c b/drivers/soc/qcom/smd.c
index ef5fed6..86b598c 100644
--- a/drivers/soc/qcom/smd.c
+++ b/drivers/soc/qcom/smd.c
@@ -921,10 +921,8 @@ static struct device_node *qcom_smd_match_channel(struct device_node *edge_node,
 	for_each_available_child_of_node(edge_node, child) {
 		key = "qcom,smd-channels";
 		ret = of_property_read_string(child, key, &name);
-		if (ret) {
-			of_node_put(child);
+		if (ret)
 			continue;
-		}
 
 		if (strcmp(name, channel) == 0)
 			return child;

qlambert