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mfd: wm831x: Fix possible NULL pointer dereference

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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>
This commit is contained in:
Javier Martinez Canillas 2015-09-14 11:07:56 +02:00 committed by Lee Jones
parent d785334a0d
commit 16dfd10375
1 changed files with 3 additions and 1 deletions
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4
drivers/mfd/wm831x-core.c
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@ -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) {