From 16dfd10375011e0999ce9d96df2df08380edf001 Mon Sep 17 00:00:00 2001
From: Javier Martinez Canillas <javier@osg.samsung.com>
Date: Mon, 14 Sep 2015 11:07:56 +0200
Subject: [PATCH] mfd: wm831x: Fix possible NULL pointer dereference
The driver always checks for pdata being NULL except in one place.
Add a check to prevent a possible NULL pointer deference error.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mfd/wm831x-core.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index 28366a90e1ad..3e0e99ec5836 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -1626,7 +1626,9 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
mutex_init(&wm831x->io_lock);
mutex_init(&wm831x->key_lock);
dev_set_drvdata(wm831x->dev, wm831x);
- wm831x->soft_shutdown = pdata->soft_shutdown;
+
+ if (pdata)
+ wm831x->soft_shutdown = pdata->soft_shutdown;
ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID);
if (ret < 0) {