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Date:   Fri, 12 Apr 2019 11:31:45 -0700
From:   Stephen Boyd <>
To:     Michael Turquette <>,
        Stephen Boyd <>
        Miquel Raynal <>,
        Jerome Brunet <>,
        Russell King <>,
        Jeffrey Hugo <>,
        Chen-Yu Tsai <>,
        Greg Kroah-Hartman <>,
        Rob Herring <>
Subject: [PATCH v4 4/9] driver core: Let dev_of_node() accept a NULL dev

We'd like to chain this in places where the 'dev' argument might be
NULL. Let this function take a NULL 'dev' so this can work.

Cc: Miquel Raynal <>
Cc: Jerome Brunet <>
Cc: Russell King <>
Cc: Michael Turquette <>
Cc: Jeffrey Hugo <>
Cc: Chen-Yu Tsai <>
Cc: Greg Kroah-Hartman <>
Cc: Rob Herring <>
Signed-off-by: Stephen Boyd <>

Please ack/review so I can take this through clk tree.

 include/linux/device.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/device.h b/include/linux/device.h
index b425a7ee04ce..0370dd0b3ae7 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -1231,7 +1231,7 @@ static inline void device_lock_assert(struct device *dev)
 static inline struct device_node *dev_of_node(struct device *dev)
+	if (!IS_ENABLED(CONFIG_OF) || !dev)
 		return NULL;
 	return dev->of_node;
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