From 43c523bff7c3b47506d536c10637be8399dfd85f Mon Sep 17 00:00:00 2001
From: Tomasz Figa <t.figa@samsung.com>
Date: Fri, 24 May 2013 15:55:35 -0700
Subject: drivers/rtc/rtc-max8998.c: check for pdata presence before
 dereferencing

Currently the driver can crash with a NULL pointer dereference if no
pdata is provided, despite of successful registration of the MFD part.
This patch fixes the problem by adding a NULL check before dereferencing
the pdata pointer.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Sachin Kamat <sachin.kamat@linaro.org>
Reviewed-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/rtc/rtc-max8998.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'drivers')

diff --git a/drivers/rtc/rtc-max8998.c b/drivers/rtc/rtc-max8998.c
index 48b6612fae7f..d5af7baa48b5 100644
--- a/drivers/rtc/rtc-max8998.c
+++ b/drivers/rtc/rtc-max8998.c
@@ -285,7 +285,7 @@ static int max8998_rtc_probe(struct platform_device *pdev)
 			info->irq, ret);
 
 	dev_info(&pdev->dev, "RTC CHIP NAME: %s\n", pdev->id_entry->name);
-	if (pdata->rtc_delay) {
+	if (pdata && pdata->rtc_delay) {
 		info->lp3974_bug_workaround = true;
 		dev_warn(&pdev->dev, "LP3974 with RTC REGERR option."
 				" RTC updates will be extremely slow.\n");
-- 
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