Subject: [PATCH 2/4] pinctrl: kirkwood: Prevent NULL dereference if of_match_device returns NULL

From: [email-masked] (Axel Lin)
Date: Thu, 15 Nov 2012 12:52:39 +0800

of_match_device() may return NULL.

Signed-off-by: Axel Lin <[email-masked]>
---
 drivers/pinctrl/mvebu/pinctrl-kirkwood.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/mvebu/pinctrl-kirkwood.c b/drivers/pinctrl/mvebu/pinctrl-kirkwood.c
index 9a74ef6..fe885ca 100644
--- a/drivers/pinctrl/mvebu/pinctrl-kirkwood.c
+++ b/drivers/pinctrl/mvebu/pinctrl-kirkwood.c
@@ -444,8 +444,11 @@ static struct of_device_id kirkwood_pinctrl_of_match[] __devinitdata = {
 
 static int __devinit kirkwood_pinctrl_probe(struct platform_device *pdev)
 {
-	const struct of_device_id *match =
-		of_match_device(kirkwood_pinctrl_of_match, &pdev->dev);
+	const struct of_device_id *match;
+
+	match = of_match_device(kirkwood_pinctrl_of_match, &pdev->dev);
+	if (!match)
+		return -ENODEV;
 	pdev->dev.platform_data = match->data;
 	return mvebu_pinctrl_probe(pdev);
 }
-- 
1.7.9.5