linux-kernel - [PATCH v1 1/3] device property: check fwnode type in to_of

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Date:	Mon, 10 Aug 2015 19:56:46 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/3] device property: check fwnode type in to_of_node()

Potentially one of platform can support both ACPI and OF. In that case when we
call to_of_node() for non-OF fwnode types we will get non-NULL result, which is
wrong. Check for the type and return a correspondent result.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 include/linux/of.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/of.h b/include/linux/of.h
index edc068d..2194b8c 100644
--- a/include/linux/of.h
+++ b/include/linux/of.h
@@ -136,7 +136,8 @@ static inline bool is_of_node(struct fwnode_handle *fwnode)
 
 static inline struct device_node *to_of_node(struct fwnode_handle *fwnode)
 {
-	return fwnode ? container_of(fwnode, struct device_node, fwnode) : NULL;
+	return is_of_node(fwnode) ?
+		container_of(fwnode, struct device_node, fwnode) : NULL;
 }
 
 static inline bool of_have_populated_dt(void)
-- 
2.5.0

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