linux-kernel - [PATCH 3.13 016/198] extcon: max8997: Fix NULL pointer exception on missing pdata

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Message-Id: <1405459868-15089-17-git-send-email-kamal@canonical.com>
Date:	Tue, 15 Jul 2014 14:28:06 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.13 016/198] extcon: max8997: Fix NULL pointer exception on missing pdata

3.13.11.5 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Krzysztof Kozlowski <k.kozlowski@...sung.com>

commit dfee4111febf3d9ef3a640b2cd6205c75f4e7e3d upstream.

Fix NULL pointer exception when platform data is not supplied. The
driver dereferenced pdata pointer where it could be NULL.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
Fixes: 810d601f07c
Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 drivers/extcon/extcon-max8997.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/extcon/extcon-max8997.c b/drivers/extcon/extcon-max8997.c
index 6a00464..5e1b88c 100644
--- a/drivers/extcon/extcon-max8997.c
+++ b/drivers/extcon/extcon-max8997.c
@@ -715,7 +715,7 @@ static int max8997_muic_probe(struct platform_device *pdev)
 		goto err_irq;
 	}
 
-	if (pdata->muic_pdata) {
+	if (pdata && pdata->muic_pdata) {
 		struct max8997_muic_platform_data *muic_pdata
 			= pdata->muic_pdata;
 
-- 
1.9.1

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