[PATCH 1/2] rdc321x-gpio: fix null pointer dereference while accessing platform_data

[Florian Fainelli <florian@openwrt.org>]

rdc321x-gpio currently fetches its driver specific data by using the platform_
device->platform_data pointer, this is wrong because the mfd device which
registers our platform_device has been added using mfd_add_device() which sets
the platform_device->driver_data pointer instead.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
CC: stable@kernel.org
---
This patch should be applied for the next 2.6.36 stable release.

diff --git a/drivers/gpio/rdc321x-gpio.c b/drivers/gpio/rdc321x-gpio.c
index 2762698..897e057 100644
--- a/drivers/gpio/rdc321x-gpio.c
+++ b/drivers/gpio/rdc321x-gpio.c
@@ -135,7 +135,7 @@ static int __devinit rdc321x_gpio_probe(struct platform_device *pdev)
 	struct rdc321x_gpio *rdc321x_gpio_dev;
 	struct rdc321x_gpio_pdata *pdata;
 
-	pdata = pdev->dev.platform_data;
+	pdata = platform_get_drvdata(pdev);
 	if (!pdata) {
 		dev_err(&pdev->dev, "no platform data supplied\n");
 		return -ENODEV;