linux-kernel - [PATCH v2] of/base: release the node correctly in of_parse_phandle_with

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Date:	Wed, 10 Apr 2013 11:36:39 +0800
From:	<Yuantian.Tang@...escale.com>
To:	<grant.likely@...retlab.ca>
CC:	<rob.herring@...xeda.com>, <devicetree-discuss@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, <linuxppc-dev@...ts.ozlabs.org>,
	Tang Yuantian <yuantian.tang@...escale.com>,
	Tang Yuantian <Yuantian.Tang@...escale.com>
Subject: [PATCH v2] of/base: release the node correctly in of_parse_phandle_with_args()

From: Tang Yuantian <yuantian.tang@...escale.com>

Call of_node_put() only when the out_args is NULL on success,
or the node's reference count will not be correct because the caller
will call of_node_put() again.

Signed-off-by: Tang Yuantian <Yuantian.Tang@...escale.com>
---
v2:
	- modified the title and description. the 1st patch title is:
	  of: remove the unnecessary of_node_put for of_parse_phandle_with_args()
	  the 1st patch is not good enough.

 drivers/of/base.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 321d3ef..ee94f64 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1158,6 +1158,7 @@ static int __of_parse_phandle_with_args(const struct device_node *np,
 			if (!phandle)
 				goto err;
 
+			/* Found it! return success */
 			if (out_args) {
 				int i;
 				if (WARN_ON(count > MAX_PHANDLE_ARGS))
@@ -1166,11 +1167,10 @@ static int __of_parse_phandle_with_args(const struct device_node *np,
 				out_args->args_count = count;
 				for (i = 0; i < count; i++)
 					out_args->args[i] = be32_to_cpup(list++);
+			} else if (node) {
+				of_node_put(node);
 			}
 
-			/* Found it! return success */
-			if (node)
-				of_node_put(node);
 			return 0;
 		}
 
-- 
1.8.0


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